York MFSI User manual

Mixed Flow Inline Fan, Model MFSI

3 Introduction,Certications&Listings
4 Features&Benets
5 Options&Accessories
6 DimensionalData
10 PerformanceData
27 SoundData
44 EngineeringSpecications
TABLE OF CONTENTS

YORK® MIXED FLOW, INLINE FAN, MODEL MFSI
3
INTRODUCTION
AMCA Certication
YORK®byJohnsonControlsMFSIcerti-
esthattheMFSIfansshownhereinare
licensedtobeartheAMCASeal.Theratings
shownarebasedontestsandprocedures
performedinaccordancewithAMCAPub-
lication211andAMCAPublication311and
complywiththerequirementsoftheAMCA
CertiedRatingsProgram.
Certifications & Listings
TheYORK®byJohnsonControlsMFSI,MixedFlowSilent
Inlinerfan,isarevolutioninthefanindustry.Itspatented
design,combinesthecompact,highvolumeadvantages
ofaxialfanswiththelowsound,highefciencyoftubular
centrifugalfans.Theoutstandingairandsoundperformance
ofthisfansetitapartfromthecompetition.Itsversatilityal-
lowsittocompetewithanyvaneaxial,mixedow,ortubular
centrifugalfan.WiththeMFSIInlinefan,YORKbringsits
innovationtomarketandsetsanewstandardforperfor-
mance.
Efficient
TheinnovativewheeloftheMFSIdischargesairatanangle
fromtheinlet,insteadofperpendicularly.Thisgivesthefan
amuchhigherefciency.Asignicantresultisthebroad
peakefciencycurvethatallowsforusingsmallerfanswith-
outsacricingsoundlevelsorhorsepower.Sincethehigh
volumetofansizeratioallowsforsmallerfansthanother
fantypes(Table1),theMFSIisalsoidealforreplacement
andretrotprojects.
Becauseofthehighefciency,thewheelcanrotatemore
slowly.Thelowspeedwheelgivesthebearingsover
120,000hoursL10(minimum)lifeforClassIIfans.Thisis
threetimesthetypicalbearinglifeofotheraxialorcentrifu-
galinlinefans.TheL10bearinglifeonClassIfansis40,000
hours.
Air Performance & Sound
Theoutstandingairandsoundperformanceofthisfanal-
lowsittooutperformawiderangeofcompetitors,including
axial,inlinecentrifugal,andmixedowfans.
Silent
Sincethemostefcientfanisalsothequiet-
est,theMFSIInlineFanexcelsinboth
measures.Becauseitdoesnotsacrice
thehighvolumeadvantagesofaxialfans,
theMFSIcanalsotakeadvantageofthe
highefciencyandlowsoundoftubular
centrifugalfans.Yougetthebestofboth.
Basically,yougetmoreCFMforthemoney
withoutalargepenaltyinnoise.Thecombina-
tionoflowspeed,lowhorsepower,lowsound,extralong
bearinglife,andhighefciencymakestheMFSIInlinefan
thebestselectionforlow,mediumorhighstaticpressure
inlinerequirements.
MFSIInlinefanscanbemountedhorizontallyorvertically.
TheyhandleCFMrangingfrom1,300-155,000andstatic
pressureupto7"W.G.
UL Certication
Mixed-FlowModelMFSIwillcarrythecUL
markforthefollowing:
•UL705PowerVentilators(ZACT,ZACT7):
File#E256857
•UL762PowerVentilatorsforRestaurantExhaust
Appliances(YZHW):File#MH10147
•ULPowerVentilatorsforSmokeControlSystems
(ZAXH,ZAXH7):File#MH10148
Fans are shown with cutaway sections to reveal interior and
wheel. Actual fan models have totally enclosed sides.

YORK® MIXED FLOW, INLINE FAN, MODEL MFSI
4
Static Efciency
Thestaticefciencycomparisontable(Figure1)graphically
illustratestheadvantageoftheMFSIdesignasairowin-
creases.Whileotherfantypesareefcientatthe“peak”of
thefancurve,theMFSIdesignmaintainsaveryhighstatic
efciencyacrossabroadvolumerange.
Forexample,comparingperformanceatastaticpressure
of2.5"W.G.,a365MFSIfanoperatingat16,000CFMhas
astaticefciencyof73.2%.Thesamefanhasastatic
efciencyof60.8%at32,000CFM.Atypicalmixedow
fansize44hasapeakstaticefciencyof65.4%at16,000
CFM.However,asthevolumeincreasesto32,000CFM,
theefciencydropsoffto17.7%.
FEATURES & BENEFITS
Product Type Size RPM BHP SE OV Octave Band LwA
12345678
YORKMFSI
365 769 8.60 73.2 1208 86 88 84 84 84 82 76 69 88
330 909 8.69 72.4 1476 84 89 84 84 84 82 77 70 88
300 1091 9.10 69.2 1795 83 91 84 84 84 83 78 72 89
TypicalAxial
36 1178 9.46 66.5 2232 92 96 101 100 93 87 83 79 100
32 1472 9.71 64.8 2820 92 92 92 91 88 84 80 76 93
28 1950 10.91 57.6 3675 93 92 92 92 89 85 82 78 94
TypicalInline
Centrifugal
365 903 10.20 61.9 1160 91 96 85 81 80 77 74 72 86
330 1101 11.10 57.0 1420 91 98 90 83 82 79 75 73 89
300 1406 13.70 46.0 1719 94 97 96 91 87 84 80 77 94
TypicalMixedFlow
44 870 10.10 62.3 1510 82 88 93 92 90 88 85 83 95
39 1089 10.85 58.0 1893 81 87 95 95 92 93 88 85 99
Figure 1
Static Efciency Comparison
Typical Inline Centrifugal
YORK MFSI
Typical Axial
Typical Mixed Flow

YORK® MIXED FLOW, INLINE FAN, MODEL MFSI
5
OPTIONS & ACCESSORIES
onthemaximumoperatingspeedofthefan’sAMCAclass,
theoperatingtemperatureofthefan,andthehorsepower.
Bearingsshallbeheavy-duty,self-aligningpillowblock
type.Pillowblockbearingsshallbeeithersinglerowballor
doublerowsphericalrollertype.Fansshallbeequipped
withgreaselinesextendingfromthebearingstoapointon
thefanexterior.
Companion Flanges
Providedasanaccessorytoaccommodateslipconnections
attheinletordischargewhenrequired.
Ceiling Brackets
Structuralanglesweldedtothefancasingareprovidedto
accommodaterodhangerswherethefanisintendedtobe
ceilingsuspended.
Access Doors
Locatedoverthewheel,positionisdeterminedbyinstalla-
tionrequirements.Doorsarequick-openinghingedtype.All
hardwareiscadmiumplatedtoresistcorrosion.
Variable Inlet Vanes
Externallymountedinletvanesandinletvanesthatare
“nested”insidetheinletconeareavailableasaccessories.
Suitableformanualormotorizedoperation.Constructed
withstainlesssteelrodsandfriction-freebearingstoassure
smoothandvibrationlessperformance.
Weather Cover
Providedwithventilationslots,affordingcompleteweather-
proofprotectionofmotoranddriveforoutdoorinstallation.
Lifting Lugs
TheseareastandardaccessoryonallYORKMFSIInline
fans,providedforconvenienceandeaseinhandlingduring
installation.
Totally Enclosed Belt Guard
Protectivecoversurroundingthemovingparts,providedfor
personnelsafety,areastandardaccessoryforMFSIfans.
Availablewithtachometeropeningwherespecied.
High Temperature Package
Standardunitswithoutaweathercoveraresuitablefor
airstreamtemperaturesupto200°F.Standardunitswitha
weathercoveraresuitableforairstreamtemperaturesupto
150°F.Seebelowforapplicationswithelevatedtempera-
tures,includingULSmokeControlSystems
UL Smoke Control
Forsmokecontrolsystems,HeatandSmokeRemoval
conguredfansarelistedperULforemergencysmoke
removal,referencingUL705,UL793,IndustrialRiskInsurers
(IRI),andSouthernBuildingCodeCongressInternational
(SBCCI).
TheULstandardrequiresthefantorunat500°Ffor4hours
(IRI)and1000°Ffor15minutes(SBCCI)YORKHeatand
SmokeRemovalconguredunitsarelistedat500°Ffor4
hoursand1000°F(300°C)for1hour.Theadditional45
minutesat1000°F(300°C)willbuyprecioustimeinthe
eventofare.
Spark Resistant Construction
TypeBandCarebothavailableinaccordancewithAMCA
specications.TypeBincludesanaluminumwheeland
nonferrousrubring.TypeCfanshavesteelwheelsbutare
constructedwithaluminuminletconesandrubringssothat
ashiftinthewheelwillnotallowtwoferrouspartstostrike.
Additional options:
• ShaftSeals
• VibrationIsolators
• Drains
• Inletand/orDischargeScreens
• SpecialPaintsorCoatings
• SpecialMetalssuchasStainlessSteelorAluminum
Fan Arrangement 9
Arrangement9fansarethemostversatiletypeofinlinefan.
Theycanbehorizontalbasemounted,horizontalceiling
hungorverticallymounted.Themotorismountedonthefan
housing,outoftheairstream.Verticalunitsareconstructed
withreinforcingendbracketsforeitheroororceiling
mounting.
BasemountedArrangement9MFSIInlinefansareavailable
insizes150through730.Ceilinghungfansandvertical
mountedfansareavailablefromsize150through660.
Single Row
Ball Bearing
Bearings
Bearingsshallbedesignedforheavy-dutyservicewith
aminimumL10lifeof40,000hoursforClassIfansand
120,000hoursforClassIIfans.Thisperformanceisbased

YORK® MIXED FLOW, INLINE FAN, MODEL MFSI
6
SIZE
DIMENSIONS - INCHES MAX.
MTR.
FRAME
ABCD E FGHJ SHAFT DIA. L M
Class I Class II
150 23 22 201/4 295/16 1411/16 11/4 16-Sep 223/4 —17/16 —271/16 215T
165 25 24 225/16 313/4 157/8 11/4 16-Sep 243/4 —17/16 —291/2 215T
182 28 263/4 2411/16 357/8 1715/16 11/2 16-Sep 271/8 13/16 17/16 —335/8 286T
200 305/16 291/8 271/16 393/16 195/8 11/2 16-Sep 30 17/16 111/16 —367/16 286T
222 333/8 321/8 301/16 431/8 219/16 11/2 16-Sep 33 17/16 111/16 —403/8 326T
245 363/8 351/8 331/8 477/8 2315/16 11/2 13/16 361/16 17/16 111/16 —451/8 326T
270 393/4 381/2 361/2 529/16 261/4 11/2 13/16 397/16 111/16 115/16 —4913/16 326T
300 447/8 431/8 409/16 573/4 287/8 213/16 439/16 115/16 23/16 —5415/16 365T
330 49 471/4 445/8 633/4 317/8 213/16 475/8 23/16 23/16 —6015/16 365T
365 533/4 52 493/8 701/2 351/4 213/16 523/8 23/16 27/16 —6711/16 365T
402 5911/16 571/2 543/8 771/8 389/16 21/2 13/16 577/8 23/16 211/16 349/16 691/8 365T
445 651/2 631/4 603/16 86 43 21/2 13/16 6311/16 27/16 211/16 39 78 365T
490 715/8 693/8 661/4 943/4 473/8 21/2 13/16 693/4 215/16 37/16 433/8 863/4 365T
542 793/4 77 733/8 1043/8 523/16 3 1 767/8 —315/16 313/4 —405T
600 871/2 843/4 813/16 1153/8 5711/16 3 1 8411/16 —47/16 339/16 —405T
660 955/8 927/8 895/16 1273/8 6311/16 3 1 9213/16 —47/16 371/8 —405T
FAN DATA | Horizontal Ceiling Hung - Arrangement 9, Class I & II
Notes:
1. Allunitsequippedwith“J”diametershaftandbearings.
2. Allunitsequippedwithadjustablemotorbase.
3. Size600anduparesplitintofrontandrearsections.
4. Beltguardisstandardonallsizes.
5. MotorisshownatpositionA.
6. Forsize730contactfactory.
7. Fanductmountingholes:
150-165=(8)9/16dia.holesequallyspacedabouta“B”dia.boltcircle.
182-270=(12)9/16dia.holesequallyspacedabouta“B”dia.boltcircle.
300-365=(16)9/16dia.holesequallyspacedabouta“B”dia.boltcircle.
402-445=(16)13/16dia.holesequallyspacedabouta“B”dia.boltcircle.
490-660=(24)13/16dia.holesequallyspacedabouta“B”dia.boltcircle.
8. Dimensionsshouldnotbeusedforconstruction.Certieddrawingsareavailable
uponrequest.
‘H’ (SUPPORT BRACKET MTG. C/C
SEE NOTE **
SEE NOTE †
DISCHARGE VIEW

YORK® MIXED FLOW, INLINE FAN, MODEL MFSI
7
SIZE
DIMENSIONS - INCHES MAX.
MTR.
FRAME
ABCD E FG
J SHAFT DIA.
NP Q R S TV
Class I Class II
150 23 22 201/4 295/16 1411/16 11/4 16-Jul —17/16 14 251/2 211/4 20 93/8 193/4 —215T
165 25 24 225/16 313/4 157/8 11/4 16-Dec — 17/16 15 271/2 241/4 22 103/8 223/4 —215T
182 28 263/4 2411/16 357/8 1715/16 11/2 16-Jul 11/5 17/16 16 30 27 211/4 10 127/8 —286T
200 305/16 291/8 271/16 393/16 195/8 11/2 16-Sep 17/16 111/16 18 331/8 30 233/4 11 141/8 —286T
222 333/8 321/8 301/16 431/8 219/16 11/2 16-Sep 17/16 111/16 20 3611/16 34 261/4 121/4 161/8 —326T
245 363/8 351/8 331/8 477/8 2315/16 11/2 16-Sep 17/16 111/16 21 393/16 38 283/4 131/2 181/8 —326T
270 393/4 381/2 361/2 529/16 261/4 11/2 16-Sep 111/16 115/16 23 427/8 42 301/4 141/4 201/8 —326T
300 447/8 431/8 409/16 573/4 287/8 2 16-Sep 115/16 23/16 25 477/16 471/2 351/8 1611/16 227/8 —365T
330 49 471/4 445/8 633/4 317/8 2 16-Sep 21/5 23/16 27 511/2 53 387/8 189/16 255/8 —365T
365 533/4 52 493/8 701/2 351/4 2 16-Sep 21/5 27/16 29 557/8 59 425/8 207/16 285/8 —365T
402 5911/16 571/2 543/8 771/8 389/16 21/2 13/16 21/5 211/16 33 627/8 653/4 471/2 225/8 317/8 —365T
445 651/2 631/4 603/16 86 43 21/2 13/16 27/16 211/16 36 683/4 73 52 247/8 353/8 —365T
490 715/8 693/8 661/4 943/4 473/8 21/2 13/16 3 37/16 39 744/5 81 58 277/8 393/8 —365T
542 793/4 77 733/8 1043/8 523/16 313/16 —315/16 43 827/8 88 67 321/8 391/2 —405T
600 871/2 843/4 813/16 1153/8 5711/16 313/16 —47/16 47 9011/32 1073/4 73 345/8 41 493/8 405T
660 955/8 927/8 895/16 1273/8 6311/16 313/16 —47/16 52 994/5 1193/4 81 385/8 47 553/8 405T
FAN DATA | Horizontal Base Mounted - Arrangement 9, Class I & II
Notes:
1. Allunitsequippedwith“J”diametershaftandbearings.
2. Allunitsequippedwithadjustablemotorbase.
3. Size600anduparesplitintofrontandrearsections.
4. Beltguardisstandardonallsizes.
5. MotorisshownatpositionA.
6. Forsize730contactfactory.
7. Fanductmountingholes:
150-165=(8)9/16dia.holesequallyspacedabout
a“B”dia.boltcircle.
182-270=(12)9/16dia.holesequallyspacedabout
a“B”dia.boltcircle.
300-365=(16)9/16dia.holesequallyspacedabout
a“B”dia.boltcircle.
402-445=(16)13/16dia.holesequallyspacedabouta
“B”dia.boltcircle.
490-660=(24)13/16dia.holesequallyspacedabouta
“B”dia.boltcircle.
8. Dimensionsshouldnotbeusedforconstruction.Certied
drawingsareavailableuponrequest.
(4) ‘G’ DIA.
MTG HOLES
PLAN VIEW
150 & 165
PLAN VIEW
182 & 542
PLAN VIEW
600 & 660
(6) ‘G’ DIA.
MTG HOLES
(8) ‘G’ DIA.
MTG HOLES
T
TT
SSSSSS
T
V
V
T
C
L
FAN
C
L
SHAFT
C
L
SHAFT
C
L
SHAFT
C
L
FAN C
L
FAN

YORK® MIXED FLOW, INLINE FAN, MODEL MFSI
8
FAN DATA | Vertical Mounted - Arrangement 9, Class II
Notes:
1. Upblastdischargeshown.Downblastsamebutinverted.
2. Allunitsequippedwith“J”dia.shaftandbearings.
3. Allunitsequippedwithadjustablemotorbase.
4. Beltguardisstandardonallsizes.
5. Forsize730contactfactory.
6. Fanductmountingholes:
150-165=(8)9/16dia.holesequallyspacedabouta“B”dia.boltcircle.
182-270=(12)9/16dia.holesequallyspacedabouta“B”dia.boltcircle.
300-365=(16)9/16dia.holesequallyspacedabouta“B”dia.boltcircle.
402-445=(16)13/16dia.holesequallyspacedabouta“B”dia.boltcircle.
490-660=(24)13/16dia.holesequallyspacedabouta“B”dia.boltcircle.
7. Dimensionsshouldnotbeusedforconstruction.Certieddrawingsare
availableuponrequest.
SIZE
DIMENSIONS - INCHES MAX.
MTR.
FRAME
ABCD E FGHJ SHAFT
DIA. L
150 23 22 201/4 295/16 1411/16 11/4 16-Jul 251/4 17/16 261/2 213T
165 25 24 225/16 313/4 157/8 11/2 16-Jul 271/5 17/16 2811/16 213T
182 28 263/4 2411/16 357/8 1715/16 11/2 16-Jul 293/4 17/16 31 213T
200 305/16 291/8 271/16 393/16 195/8 11/2 16-Jul 3311/16 111/16 357/16 215T
222 333/8 321/8 301/16 431/8 219/16 11/2 4-Mar 3611/16 111/16 387/16 254T
245 363/8 351/8 331/8 477/8 2315/16 11/2 4-Mar 395/8 111/16 413/8 254T
270 393/4 381/2 361/2 529/16 261/4 11/2 4-Mar 43/8 115/16 447/8 256T
300 447/8 431/8 409/16 573/4 287/8 24-Mar 473/8 23/16 491/8 256T
330 49 471/4 445/8 633/4 317/8 24-Mar 514/9 23/16 533/16 284T
365 533/4 52 493/8 701/2 351/4 24-Mar 561/5 211/16 5715/16 286T
402 5911/16 571/2 543/8 771/8 389/16 21/2 16-Sep 653/4 215/16 673/4 324T
445 651/2 631/2 603/16 86 43 21/2 16-Sep 711/2 37/16 731/2 324T
490 715/8 693/8 661/4 943/4 473/8 21/2 16-Sep 775/8 37/16 795/8 324T
542 793/4 77 733/8 1043/8 523/16 313/16 845/8 315/16 865/8 326T
600 871/2 843/4 813/16 1153/8 5711/16 34-Mar 941/4 47/16 991/4 405T
660 955/8 927/8 895/16 1273/8 6311/16 34-Mar 1021/2 47/16 1071/2 405T
‘H’ (SUPPORT BRACKET MTG. C/C
SEE NOTE **
SEE NOTE †
DISCHARGE VIEW
VIEW SHOWS STANDARD
MOUNTING CLIPS,
(4) WILL BE FURNISHED & MOUNTED
AS REQUIRED - (SIZE 150 & 165)
BELT GUARD BELT GUARD
AIRFLOW
3.19
3.19 3.19
‘G’ DIA.
MTG. HOLES
‘G’ DIA.
MTG. HOLES
‘G’ DIA.
MTG. HOLES
‘H’ B.C.
‘L’ O.D.
AIRFLOW AIRFLOW
BELT GUARD
VIEW SHOWS STANDARD
MOUNTING CLIPS,
(6) WILL BE FURNISHED & MOUNTED
AS REQUIRED - (SIZE 182 & 365)
VIEW SHOWS STANDARD
END BRACKETS,
(4) WILL BE FURNISHED
(SIZE 402 & 660)
‘H’ B.C.
‘L’ O.D.
‘H’ B.C.
‘L’ O.D.

YORK® MIXED FLOW, INLINE FAN, MODEL MFSI
9
FAN DATA | Vertical Roof Mounted - Arrangement 9, Class II
150-490CURBCAP 542-660CURBCAP
Notes:
1. Dimensionsshouldnotbeusedforconstruction.Certieddrawingsareavailableuponrequest.
SIZE
DIMENSIONS - INCHES MAX.
MTR.
FRAME
ABCD E FGH
150 285/8 201/4 54 303/8 11/4 203/4 5-Jan 303/8 213T
165 305/8 211/2 571/2 323/8 11/4 223/4 5-Jan 323/8 213T
182 335/8 221/2 627/8 333/4 11/2 251/5 61/2 347/8 213T
200 395/8 251/2 693/16 351/4 11/2 272/3 71/2 373/8 215T
222 395/8 251/2 731/8 383/4 11/2 302/3 81/2 403/8 254T
245 455/8 281/2 807/8 401/2 11/2 333/4 9-Jan 433/8 254T
270 515/8 281/2 854/7 421/4 11/2 371/8 10-Jan 463/4 256T
300 575/8 31 933/4 441/2 2 413/8 11-Jan 51 256T
330 635/8 34 1023/4 471/2 2 457/16 12-Jan 551/8 284T
365 695/8 37 1121/2 50 2 503/16 13-Jan 597/8 286T
402 755/8 401/2 1231/8 551/2 21/2 551/5 14-Jan 647/8 324T
445 845/8 421/2 134 583/4 21/2 61 151/2 695/8 324T
490 945/8 491/2 1443/4 613/4 21/2 67 17-Jan 763/8 324T
542 945/8 57 1683/8 673/4 3 741/4 15 863/4 326T
600 945/8 57 1793/8 731/2 3 82 171/4 961/4 405T
660 1045/8 66 2003/8 78 3 901/8 171/2 1051/4 405T

YORK® MIXED FLOW, INLINE FAN, MODEL MFSI
10
150
Wheel Dia. Outlet Area Tip Speed (FPM) Maximum BHP Max. Motor Frame Size
18.25in. 2.24sq.ft. 4.78xRPM .18(RPM/1000)3215T
PerformanceshownisforInstallationTypeB:freeinlet,ductedoutlet.Powerrating(BHP)doesnotincludebeltdrivelosses.Performanceratings
donotincludetheeffectsofappurtenancesintheairstream.Boldguresindicatemaximumstaticefciency.Approximatefanweightsareless
motorandaccessories.
CFM OV 1/4" SP 1/2" SP 3/4" SP 1" SP 1 1/4" SP 1 1/2" SP 1 3/4" SP 2" SP 2 1/4" SP 2 1/2" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1300 580 824 0.10 977 0.17 1118 0.25 --------------
1400 625 863 0.11 1008 0.19 1142 0.27 1269 0.36 - - ----------
1500 670 903 0.12 1042 0.20 1169 0.29 1290 0.38 1406 0.49 ----------
1600 714 944 0.14 1077 0.22 1199 0.31 1315 0.41 1426 0.51 ----------
1700 759 986 0.15 1113 0.24 1230 0.34 1341 0.44 1448 0.54 1551 0.66 --------
1800 804 1028 0.17 1151 0.26 1263 0.36 1370 0.47 1473 0.58 1572 0.69 1669 0.81 ------
1900 848 1071 0.19 1190 0.29 1298 0.39 1401 0.50 1499 0.61 1595 0.73 1689 0.85 1779 0.98 ----
2000 893 1114 0.21 1229 0.31 1334 0.42 1433 0.53 1528 0.65 1621 0.77 1711 0.90 1799 1.03 1885 1.17 - -
2100 938 1158 0.23 1269 0.34 1370 0.45 1466 0.57 1558 0.69 1648 0.81 1735 0.94 1820 1.08 1904 1.22 1985 1.36
2200 982 1202 0.26 1310 0.37 1408 0.48 1501 0.60 1590 0.73 1677 0.85 1761 0.99 1844 1.13 1924 1.27 2004 1.42
2500 1116 1335 0.34 1435 0.47 1525 0.59 1611 0.73 1692 0.86 1771 1.00 1849 1.14 1924 1.29 1998 1.44 2071 1.60
2800 1250 1471 0.45 1563 0.58 1648 0.72 1727 0.87 1803 1.02 1876 1.17 1947 1.32 2017 1.48 2085 1.64 2153 1.81
3100 1384 1608 0.58 1695 0.73 1774 0.88 1848 1.03 1919 1.19 1987 1.36 2053 1.52 2118 1.69 2182 1.87 2245 2.04
3400 1518 1746 0.73 1828 0.89 1902 1.06 1972 1.22 2039 1.40 2103 1.57 2166 1.75 2227 1.93 2287 2.12 2346 2.31
3700 1652 1886 0.91 1962 1.08 2033 1.26 2099 1.44 2163 1.63 2224 1.82 2283 2.01 2340 2.20 2397 2.40 2452 2.60
4000 1786 2026 1.12 2098 1.31 2165 1.49 2228 1.69 2289 1.89 2347 2.09 2403 2.29 2458 2.50 2512 2.71 2564 2.92
4300 1920 2167 1.36 2235 1.56 2299 1.76 2359 1.97 2417 2.18 2473 2.39 2526 2.61 2579 2.83 2630 3.05 2680 3.27
4600 2054 2308 1.64 2373 1.85 2434 2.06 2492 2.28 2547 2.50 2600 2.73 2652 2.96 2702 3.19 2751 3.42 2799 3.66
4900 2188 2450 1.95 2512 2.17 2570 2.40 2626 2.63 2679 2.87 2730 3.10 2779 3.34 2828 3.59 2875 3.84 2921 4.08
5200 2321 2593 2.30 2652 2.54 2707 2.78 2760 3.02 2811 3.27 2861 3.52 2908 3.77 2955 4.03 3000 4.29 3045 4.55
CFM OV 2 3/4" SP 3" SP 3 1/2" SP 4" SP 4 1/2" SP 5" SP 5 1/2" SP 6" SP 6 1/2" SP 7" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2600 1161 2167 1.83 2236 2.00 2370 2.34 --------------
2700 1205 2192 1.90 2259 2.07 2391 2.42 2519 2.79 ------------
2800 1250 2219 1.98 2284 2.15 2413 2.51 2538 2.88 ------------
2900 1295 2247 2.06 2311 2.23 2436 2.60 2559 2.98 2678 3.37 ----------
3000 1339 2276 2.14 2339 2.32 2461 2.69 2581 3.07 2698 3.47 2813 3.88 --------
3100 1384 2307 2.22 2368 2.41 2487 2.78 2604 3.17 2719 3.58 2832 3.99 --------
3200 1429 2338 2.31 2398 2.50 2515 2.88 2629 3.28 2742 3.69 2852 4.11 2960 4.54 ------
3300 1473 2370 2.40 2429 2.59 2543 2.98 2655 3.38 2765 3.80 2873 4.23 2979 4.67 3084 5.12 ----
3400 1518 2403 2.50 2461 2.69 2573 3.09 2683 3.50 2790 3.92 2896 4.35 3000 4.80 3103 5.26 3203 5.73 - -
3500 1563 2437 2.59 2493 2.79 2603 3.20 2711 3.61 2816 4.04 2920 4.48 3022 4.93 3123 5.39 3222 5.87 - -
3600 1607 2472 2.70 2527 2.90 2634 3.31 2740 3.73 2844 4.16 2945 4.61 3046 5.07 3144 5.53 3242 6.02 3337 6.51
3700 1652 2507 2.80 2561 3.00 2667 3.42 2770 3.85 2872 4.29 2972 4.74 3070 5.21 3167 5.68 3262 6.17 3357 6.67
3800 1696 2543 2.91 2596 3.12 2700 3.54 2801 3.98 2901 4.43 2999 4.88 3095 5.35 3191 5.83 3285 6.32 3377 6.83
3900 1741 2579 3.02 2631 3.23 2733 3.66 2833 4.11 2931 4.56 3027 5.03 3122 5.50 3215 5.99 3308 6.49 3399 6.99
4000 1786 2616 3.13 2667 3.35 2767 3.79 2865 4.24 2961 4.70 3056 5.17 3149 5.66 3241 6.15 3332 6.65 - -
4100 1830 2654 3.25 2704 3.47 2802 3.92 2898 4.38 2993 4.85 3086 5.33 3177 5.81 3268 6.31 3357 6.82 - -
4350 1942 2749 3.56 2797 3.79 2892 4.26 2984 4.74 3075 5.23 3164 5.72 3252 6.23 3338 6.75 ----
4600 2054 2846 3.90 2893 4.14 2984 4.63 3073 5.13 3160 5.63 3246 6.15 3330 6.67 ------
4850 2165 2946 4.26 2991 4.51 3079 5.02 3165 5.54 3249 6.07 3332 6.60 --------
5100 2277 3047 4.65 3091 4.91 3176 5.44 3259 5.98 3340 6.53 ----------
41 3/4
(MAX)
29 5/16
211/4
23
20
jWR2=InertialStartingForce
kMaximumRPMisbasedonoperatingtemperatureof100°F.
From101°Fthrough200°FmultiplyRPMby0.93.
Class Fan Weight
(Lbs.)
Wheel Weight
(Lbs.)
WR2j
(Lbs. Ft.2)
Max. Wheel RPMk
(Steel or Aluminum)
INA 31 6 2727
II 206 31 6 3409

YORK® MIXED FLOW, INLINE FAN, MODEL MFSI
11
165
Wheel Dia. Outlet Area Tip Speed (FPM) Maximum BHP Max. Motor Frame Size
20.0in. 2.72sq.ft. 5.74xRPM .29(RPM/1000)3215T
PerformanceshownisforInstallationTypeB:freeinlet,ductedoutlet.Powerrating(BHP)doesnotincludebeltdrivelosses.Performanceratings
donotincludetheeffectsofappurtenancesintheairstream.Boldguresindicatemaximumstaticefciency.Approximatefanweightsareless
motorandaccessories.
CFM OV 1/4" SP 1/2" SP 3/4" SP 1" SP 1 1/4" SP 1 1/2" SP 1 3/4" SP 2" SP 2 1/4" SP 2 1/2" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1500 551 734 0.11 878 0.19 1010 0.29 --------------
1650 607 778 0.13 912 0.22 1036 0.32 1153 0.43 ------------
1800 662 824 0.15 950 0.24 1067 0.35 1177 0.46 1283 0.58 ----------
1950 717 871 0.17 991 0.27 1101 0.38 1205 0.50 1306 0.63 1403 0.76 --------
2100 772 918 0.19 1033 0.30 1137 0.42 1236 0.54 1332 0.67 1425 0.81 --------
2250 827 967 0.22 1076 0.34 1176 0.46 1270 0.59 1362 0.72 1450 0.86 1536 1.01 1619 1.17 ----
2400 882 1016 0.25 1121 0.37 1216 0.50 1307 0.64 1394 0.78 1478 0.92 1561 1.07 1641 1.23 1719 1.40 - -
2550 938 1066 0.29 1167 0.42 1258 0.55 1345 0.69 1429 0.83 1510 0.99 1589 1.14 1666 1.31 1741 1.47 1815 1.65
2700 993 1116 0.33 1213 0.46 1302 0.60 1385 0.75 1465 0.90 1543 1.05 1619 1.21 1693 1.38 1766 1.56 1837 1.73
2850 1048 1167 0.37 1261 0.51 1346 0.65 1426 0.81 1504 0.96 1579 1.12 1652 1.29 1723 1.46 1793 1.64 1862 1.82
3200 1176 1286 0.48 1373 0.63 1453 0.80 1527 0.96 1599 1.13 1668 1.31 1735 1.49 1801 1.67 1866 1.86 1929 2.05
3500 1287 1390 0.60 1472 0.76 1547 0.94 1617 1.12 1685 1.30 1750 1.49 1813 1.68 1875 1.87 1936 2.07 1995 2.28
3800 1397 1494 0.73 1572 0.91 1643 1.10 1710 1.29 1774 1.48 1835 1.68 1895 1.89 1954 2.09 2011 2.30 2068 2.52
4100 1507 1599 0.89 1673 1.08 1741 1.28 1805 1.48 1866 1.69 1924 1.90 1981 2.12 2037 2.34 2091 2.56 2145 2.79
4400 1618 1705 1.07 1776 1.27 1840 1.48 1901 1.70 1960 1.92 2016 2.14 2070 2.37 2123 2.60 2175 2.84 2226 3.07
4700 1728 1812 1.27 1879 1.49 1941 1.71 1999 1.94 2055 2.17 2109 2.41 2161 2.65 2212 2.89 2261 3.14 2310 3.39
5000 1838 1919 1.50 1983 1.73 2042 1.96 2098 2.21 2152 2.45 2204 2.70 2254 2.95 2303 3.21 2350 3.47 2397 3.73
5300 1949 2026 1.76 2087 2.00 2144 2.25 2198 2.50 2250 2.76 2300 3.02 2348 3.28 2395 3.55 2441 3.83 2486 4.10
5600 2059 2134 2.04 2192 2.30 2247 2.56 2299 2.82 2349 3.09 2397 3.37 2444 3.65 2489 3.93 2534 4.21 2577 4.50
5900 2169 2241 2.36 2298 2.63 2351 2.90 2401 3.18 2449 3.46 2496 3.75 2541 4.04 2585 4.33 2628 4.63 2670 4.93
CFM OV 2 3/4" SP 3" SP 3 1/2" SP 4" SP 4 1/2" SP 5" SP 5 1/2" SP 6" SP 6 1/2" SP 7" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
3300 1213 2012 2.33 2072 2.53 2191 2.96 2307 3.41 ------------
3400 1250 2033 2.40 2092 2.61 2208 3.05 2322 3.50 2432 3.96 ----------
3500 1287 2054 2.48 2112 2.70 2226 3.13 2338 3.59 2447 4.06 ----------
3600 1324 2076 2.57 2133 2.78 2245 3.23 2355 3.69 2462 4.16 2566 4.66 --------
3700 1360 2099 2.65 2155 2.87 2265 3.32 2372 3.79 2477 4.27 2580 4.77 --------
3800 1397 2123 2.74 2178 2.96 2286 3.42 2391 3.89 2494 4.38 2596 4.88 2695 5.41 ------
3900 1434 2147 2.83 2201 3.05 2307 3.52 2410 4.00 2512 4.49 2611 5.00 2709 5.53 2805 6.07 ----
4000 1471 2172 2.92 2225 3.15 2329 3.62 2431 4.10 2530 4.61 2628 5.12 2724 5.65 2819 6.20 ----
4100 1507 2197 3.01 2249 3.25 2351 3.73 2451 4.22 2549 4.72 2646 5.25 2740 5.78 2834 6.33 2925 6.90 - -
4200 1544 2223 3.11 2274 3.35 2375 3.83 2473 4.33 2569 4.85 2664 5.37 2757 5.91 2849 6.47 2939 7.04 - -
4300 1581 2249 3.21 2300 3.45 2398 3.95 2495 4.45 2590 4.97 2683 5.50 2775 6.05 2865 6.61 2954 7.19 3042 7.78
4400 1618 2276 3.32 2325 3.56 2423 4.06 2518 4.57 2611 5.10 2703 5.64 2793 6.19 2882 6.76 2970 7.34 3056 7.94
4500 1654 2303 3.42 2352 3.67 2447 4.18 2541 4.70 2633 5.23 2723 5.78 2812 6.33 2900 6.91 2986 7.50 3072 8.10
4600 1691 2330 3.53 2378 3.78 2472 4.30 2565 4.82 2655 5.36 2744 5.92 2832 6.48 2918 7.06 3003 7.65 3088 8.26
4700 1728 2358 3.64 2405 3.90 2498 4.42 2589 4.96 2678 5.50 2766 6.06 2852 6.63 2937 7.22 3021 7.82 3104 8.43
4800 1765 2386 3.76 2433 4.02 2524 4.55 2614 5.09 2701 5.64 2788 6.21 2873 6.79 2957 7.38 3040 7.98 - -
5050 1857 2458 4.06 2503 4.33 2591 4.88 2677 5.44 2762 6.01 2845 6.59 2927 7.19 3008 7.80 3088 8.41 - -
5300 1949 2531 4.38 2574 4.66 2660 5.23 2743 5.81 2825 6.40 2906 7.00 2985 7.61 3063 8.24 ----
5550 2040 2605 4.72 2647 5.01 2730 5.60 2811 6.20 2890 6.81 2968 7.43 3045 8.06 ------
5800 2132 2681 5.08 2722 5.38 2802 5.99 2881 6.61 2958 7.24 3034 7.88 3108 8.53 ------
42 3/4
(MAX)
31 3/4
24 1/4
25
22
jWR2=InertialStartingForce
kMaximumRPMisbasedonoperatingtemperatureof100°F.
From101°Fthrough200°FmultiplyRPMby0.93.
Class Fan Weight
(Lbs.)
Wheel Weight
(Lbs.)
WR2j
(Lbs. Ft.2)
Max. Wheel RPMk
(Steel or Aluminum)
INA 38 92488
II 248 38 93111

YORK® MIXED FLOW, INLINE FAN, MODEL MFSI
12
182
Wheel Dia. Outlet Area Tip Speed (FPM) Maximum BHP Max. Motor Frame Size
22.25in. 3.32sq.ft. 5.83xRPM .43(RPM/1000)3286T
PerformanceshownisforInstallationTypeB:freeinlet,ductedoutlet.Powerrating(BHP)doesnotincludebeltdrivelosses.Performanceratings
donotincludetheeffectsofappurtenancesintheairstream.Boldguresindicatemaximumstaticefciency.Approximatefanweightsareless
motorandaccessories.
CFM OV 1/4" SP 1/2" SP 3/4" SP 1" SP 1 1/4" SP 1 1/2" SP 1 3/4" SP 2" SP 2 1/4" SP 2 1/2" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
1750 527 668 0.12 803 0.22 921 0.33 --------------
1900 572 701 0.14 830 0.24 943 0.36 1048 0.49 - - ----------
2050 617 734 0.15 859 0.27 968 0.39 1068 0.52 1163 0.66 ----------
2200 663 767 0.17 888 0.29 994 0.42 1090 0.56 1182 0.70 ----------
2350 708 802 0.19 919 0.32 1021 0.45 1114 0.59 1202 0.74 1287 0.90 --------
2500 753 837 0.22 951 0.35 1050 0.49 1140 0.63 1225 0.79 1307 0.95 1385 1.12 ------
2650 798 872 0.24 983 0.38 1079 0.53 1167 0.68 1250 0.84 1328 1.00 1404 1.18 1478 1.36 ----
2800 843 908 0.27 1016 0.41 1109 0.56 1195 0.72 1276 0.89 1352 1.06 1426 1.24 1497 1.42 1566 1.62 - -
2950 889 944 0.30 1049 0.45 1141 0.61 1224 0.77 1302 0.94 1377 1.12 1448 1.30 1518 1.49 1585 1.69 1651 1.89
3100 934 980 0.33 1083 0.49 1172 0.65 1254 0.82 1330 1.00 1403 1.18 1473 1.37 1540 1.56 1606 1.77 1669 1.97
3500 1054 1079 0.42 1175 0.60 1259 0.78 1337 0.97 1409 1.16 1477 1.36 1543 1.57 1606 1.77 1667 1.99 1727 2.21
3900 1175 1180 0.54 1269 0.73 1349 0.93 1423 1.14 1492 1.35 1557 1.57 1619 1.78 1679 2.01 1737 2.24 1793 2.47
4300 1295 1282 0.68 1366 0.89 1442 1.11 1512 1.33 1578 1.56 1640 1.79 1699 2.03 1757 2.27 1812 2.51 1866 2.76
4700 1416 1385 0.85 1464 1.07 1536 1.31 1603 1.55 1666 1.79 1726 2.04 1783 2.30 1838 2.55 1891 2.81 1943 3.08
5100 1536 1490 1.04 1564 1.28 1632 1.53 1697 1.79 1757 2.05 1815 2.32 1870 2.59 1922 2.87 1974 3.14 2023 3.43
5500 1657 1595 1.27 1665 1.52 1730 1.79 1791 2.07 1850 2.35 1905 2.63 1958 2.92 2009 3.21 2058 3.51 2106 3.80
5900 1777 1701 1.52 1767 1.80 1829 2.08 1888 2.37 1944 2.67 1997 2.97 2048 3.28 2098 3.59 2146 3.90 2192 4.21
6300 1898 1807 1.81 1870 2.10 1929 2.40 1985 2.71 2039 3.03 2091 3.34 2140 3.67 2188 3.99 2234 4.33 2279 4.66
6700 2018 1914 2.14 1973 2.45 2030 2.76 2084 3.09 2136 3.42 2185 3.76 2233 4.10 2280 4.44 2325 4.79 2369 5.14
7100 2139 2021 2.51 2078 2.83 2131 3.16 2183 3.51 2233 3.85 2281 4.21 2328 4.56 2373 4.92 2417 5.29 2459 5.66
CFM OV 2 3/4" SP 3" SP 3 1/2" SP 4" SP 4 1/2" SP 5" SP 5 1/2" SP 6" SP 6 1/2" SP 7" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
3700 1114 1816 2.57 1872 2.80 1980 3.29 2084 3.81 ------------
3800 1145 1832 2.64 1887 2.88 1993 3.37 2096 3.89 ------------
3900 1175 1849 2.71 1902 2.95 2007 3.45 2109 3.98 2208 4.52 ----------
4000 1205 1865 2.78 1919 3.03 2022 3.54 2122 4.06 2220 4.61 ----------
4100 1235 1883 2.86 1935 3.11 2037 3.62 2136 4.15 2232 4.71 2326 5.28 --------
4200 1265 1900 2.93 1952 3.19 2053 3.71 2150 4.25 2245 4.81 2338 5.38 --------
4300 1295 1918 3.01 1969 3.27 2069 3.80 2165 4.34 2259 4.91 2350 5.49 2439 6.09 ------
4400 1325 1936 3.09 1987 3.35 2085 3.89 2181 4.44 2273 5.01 2363 5.60 2451 6.21 ------
4500 1355 1955 3.18 2005 3.44 2102 3.98 2196 4.54 2288 5.12 2376 5.71 2463 6.32 2549 6.95 ----
4600 1386 1974 3.26 2023 3.53 2119 4.08 2212 4.64 2303 5.22 2390 5.82 2476 6.44 2561 7.08 ----
4700 1416 1993 3.35 2042 3.62 2137 4.17 2229 4.75 2318 5.34 2405 5.94 2490 6.56 2573 7.20 2655 7.86 - -
4800 1446 2012 3.44 2061 3.71 2155 4.27 2246 4.85 2334 5.45 2420 6.06 2504 6.69 2586 7.33 2667 8.00 - -
4900 1476 2032 3.53 2080 3.80 2173 4.38 2263 4.96 2350 5.56 2435 6.18 2518 6.82 2599 7.47 2679 8.13 2758 8.82
5000 1506 2051 3.62 2099 3.90 2191 4.48 2280 5.07 2366 5.68 2451 6.31 2533 6.95 2613 7.60 2692 8.27 2770 8.96
5100 1536 2071 3.71 2119 4.00 2210 4.59 2298 5.19 2383 5.80 2466 6.43 2548 7.08 2627 7.74 2705 8.42 2782 9.11
5200 1566 2092 3.81 2138 4.10 2229 4.69 2316 5.30 2400 5.92 2483 6.56 2563 7.21 2642 7.88 2719 8.57 2795 9.26
5450 1642 2143 4.05 2188 4.36 2277 4.97 2362 5.60 2445 6.24 2525 6.90 2603 7.56 2680 8.25 2755 8.95 - -
5700 1717 2195 4.32 2240 4.63 2326 5.26 2410 5.91 2490 6.57 2569 7.24 2645 7.93 2720 8.63 2794 9.34 - -
5950 1792 2248 4.59 2292 4.91 2377 5.57 2458 6.24 2537 6.92 2614 7.61 2689 8.31 2762 9.03 ----
6200 1867 2302 4.88 2345 5.21 2428 5.89 2508 6.58 2586 7.28 2661 7.99 2734 8.71 ------
jWR2=InertialStartingForce
kMaximumRPMisbasedonoperatingtemperatureof100°F.
From101°Fthrough200°FmultiplyRPMby0.93.
Class Fan Weight
(Lbs.)
Wheel Weight
(Lbs.)
WR2j
(Lbs. Ft.2)
Max. Wheel RPMk
(Steel or Aluminum)
I282 38 13 2236
II 297 49 15 2796
48 7/8
(MAX)
35 7/8
27
28
21 1/4

YORK® MIXED FLOW, INLINE FAN, MODEL MFSI
13
200
Wheel Dia. Outlet Area Tip Speed (FPM) Maximum BHP Max. Motor Frame Size
24.5in. 4.00sq.ft. 6.41xRPM .69(RPM/1000)3286T
CFM OV 1/4" SP 1/2" SP 3/4" SP 1" SP 1 1/4" SP 1 1/2" SP 1 3/4" SP 2" SP 2 1/4" SP 2 1/2" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2400 600 652 0.18 767 0.31 868 0.45 961 0.61 ------------
2600 650 685 0.20 797 0.34 893 0.49 982 0.66 1066 0.83 ----------
2800 700 720 0.23 827 0.38 920 0.54 1006 0.71 1087 0.89 1164 1.08 --------
3000 750 754 0.26 858 0.42 949 0.58 1031 0.76 1109 0.95 1183 1.14 1255 1.35 ------
3200 800 790 0.29 890 0.46 978 0.63 1058 0.82 1133 1.01 1205 1.21 1274 1.42 1341 1.64 ----
3400 850 825 0.33 923 0.50 1008 0.69 1086 0.88 1159 1.08 1228 1.29 1295 1.50 1360 1.73 1423 1.96 - -
3600 900 861 0.36 956 0.55 1039 0.74 1115 0.94 1186 1.15 1253 1.37 1318 1.59 1381 1.82 1442 2.06 1501 2.31
3800 950 898 0.41 990 0.60 1071 0.80 1145 1.01 1214 1.23 1280 1.45 1343 1.68 1403 1.92 1463 2.16 1520 2.42
4000 1000 935 0.45 1025 0.66 1104 0.87 1176 1.08 1243 1.31 1307 1.54 1368 1.78 1428 2.02 1485 2.27 1541 2.53
4500 1125 1028 0.59 1112 0.81 1187 1.04 1255 1.28 1319 1.53 1379 1.78 1437 2.03 1493 2.30 1547 2.57 1600 2.84
5000 1250 1123 0.75 1202 0.99 1272 1.25 1337 1.51 1398 1.78 1456 2.05 1511 2.32 1564 2.61 1615 2.89 1665 3.19
5500 1375 1220 0.94 1293 1.21 1360 1.48 1422 1.77 1480 2.05 1535 2.35 1588 2.65 1639 2.95 1688 3.26 1735 3.57
6000 1500 1317 1.17 1386 1.46 1449 1.75 1509 2.06 1564 2.37 1617 2.68 1668 3.00 1717 3.33 1764 3.66 1809 3.99
6500 1625 1415 1.44 1480 1.74 1540 2.06 1597 2.38 1650 2.72 1701 3.05 1750 3.40 1797 3.74 1842 4.09 1886 4.45
7000 1750 1514 1.74 1575 2.07 1632 2.41 1686 2.75 1738 3.11 1787 3.47 1834 3.83 1879 4.20 1923 4.57 1966 4.95
7500 1875 1614 2.09 1671 2.44 1726 2.80 1777 3.16 1827 3.54 1874 3.92 1920 4.31 1964 4.70 2006 5.09 2047 5.49
8000 2000 1713 2.49 1768 2.86 1820 3.24 1869 3.62 1917 4.02 1963 4.42 2007 4.83 2049 5.24 2090 5.66 2130 6.08
8500 2125 1814 2.94 1865 3.33 1915 3.72 1963 4.13 2008 4.55 2052 4.97 2095 5.40 2136 5.84 2176 6.27 2215 6.72
9000 2250 1914 3.44 1964 3.85 2011 4.27 2056 4.69 2100 5.13 2143 5.58 2184 6.03 2224 6.48 2263 6.94 2301 7.41
9500 2375 2015 4.00 2062 4.43 2107 4.86 2151 5.31 2194 5.77 2235 6.24 2274 6.71 2313 7.18 2351 7.66 2388 8.15
CFM OV 2 3/4" SP 3" SP 3 1/2" SP 4" SP 4 1/2" SP 5" SP 5 1/2" SP 6" SP 6 1/2" SP 7" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
4400 1100 1639 3.05 1690 3.34 1789 3.93 --------------
4550 1138 1657 3.16 1707 3.45 1804 4.04 1898 4.67 ------------
4700 1175 1675 3.26 1724 3.56 1820 4.16 1912 4.79 2002 5.45 ----------
4850 1213 1694 3.37 1742 3.67 1836 4.29 1927 4.93 2016 5.59 ----------
5000 1250 1713 3.49 1761 3.79 1854 4.41 1943 5.06 2030 5.74 2115 6.43 --------
5150 1288 1733 3.60 1780 3.91 1871 4.55 1959 5.20 2045 5.88 2128 6.59 --------
5300 1325 1754 3.72 1800 4.04 1890 4.68 1976 5.35 2060 6.04 2143 6.75 2223 7.48 ------
5450 1363 1775 3.85 1820 4.17 1908 4.82 1994 5.50 2077 6.20 2158 6.92 2237 7.66 2314 8.42 ----
5600 1400 1796 3.97 1841 4.30 1928 4.97 2012 5.65 2094 6.36 2173 7.09 2251 7.84 2327 8.61 ----
5750 1438 1817 4.10 1862 4.43 1948 5.11 2031 5.81 2111 6.53 2190 7.26 2266 8.02 2342 8.80 2415 9.60 - -
5900 1475 1839 4.24 1883 4.57 1968 5.26 2050 5.97 2129 6.70 2207 7.44 2282 8.21 2356 9.00 2429 9.80 2501 10.63
6050 1513 1861 4.37 1904 4.72 1988 5.42 2069 6.14 2148 6.87 2224 7.63 2299 8.41 2372 9.20 2444 10.02 2514 10.85
6200 1550 1884 4.51 1926 4.86 2009 5.58 2089 6.31 2167 7.05 2242 7.82 2316 8.60 2388 9.41 2459 10.23 2528 11.07
6350 1588 1906 4.66 1949 5.02 2030 5.74 2109 6.48 2186 7.24 2260 8.01 2333 8.81 2404 9.62 2474 10.45 2543 11.30
6500 1625 1929 4.81 1971 5.17 2052 5.91 2130 6.66 2206 7.43 2279 8.21 2351 9.02 2421 9.84 2490 10.68 - -
6800 1700 1976 5.11 2017 5.49 2096 6.25 2172 7.03 2246 7.82 2318 8.63 2388 9.45 2457 10.29 2524 11.15 - -
7100 1775 2023 5.44 2063 5.82 2141 6.61 2216 7.41 2288 8.23 2358 9.06 2427 9.90 2494 10.77 ----
7400 1850 2071 5.78 2111 6.18 2187 6.99 2260 7.81 2331 8.65 2400 9.51 2467 10.37 2533 11.26 ----
7700 1925 2120 6.13 2159 6.54 2233 7.38 2305 8.23 2375 9.10 2443 9.97 2509 10.87 ------
8000 2000 2169 6.50 2207 6.93 2281 7.79 2352 8.67 2420 9.56 2486 10.46 --------
jWR2=InertialStartingForce
kMaximumRPMisbasedonoperatingtemperatureof100°F.
From101°Fthrough200°FmultiplyRPMby0.93.
Class Fan Weight
(Lbs.)
Wheel Weight
(Lbs.)
WR2j
(Lbs. Ft.2)
Max. Wheel RPMk
(Steel or Aluminum)
I 335 52 22 2041
II 353 65 28 2551
56 3/8
(MAX)
39 3/16
30
30 5/16
23 3/4
PerformanceshownisforInstallationTypeB:freeinlet,ductedoutlet.Powerrating(BHP)doesnotincludebeltdrivelosses.Performanceratings
donotincludetheeffectsofappurtenancesintheairstream.Boldguresindicatemaximumstaticefciency.Approximatefanweightsareless
motorandaccessories.

YORK® MIXED FLOW, INLINE FAN, MODEL MFSI
14
222
Wheel Dia. Outlet Area Tip Speed (FPM) Maximum BHP Max. Motor Frame Size
27.0in. 4.93sq.ft. 7.07xRPM 1.26(RPM/1000)3326T
PerformanceshownisforInstallationTypeB:freeinlet,ductedoutlet.Powerrating(BHP)doesnotincludebeltdrivelosses.Performanceratings
donotincludetheeffectsofappurtenancesintheairstream.Boldguresindicatemaximumstaticefciency.Approximatefanweightsareless
motorandaccessories.
CFM OV 1/4" SP 1/2" SP 3/4" SP 1" SP 1 1/4" SP 1 1/2" SP 1 3/4" SP 2" SP 2 1/4" SP 2 1/2" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
3000 609 534 0.18 645 0.33 741 0.50 --------------
3500 710 585 0.23 686 0.39 776 0.58 858 0.77 ------------
4000 811 639 0.28 732 0.47 816 0.67 893 0.88 965 1.10 1032 1.34 --------
4500 913 695 0.35 780 0.55 859 0.77 932 1.00 1001 1.24 1065 1.49 1126 1.75 1185 2.01 ----
5000 1014 753 0.43 832 0.65 906 0.88 975 1.13 1040 1.39 1102 1.65 1160 1.93 1217 2.21 1271 2.50 1323 2.80
5500 1116 813 0.52 886 0.76 955 1.01 1020 1.27 1082 1.55 1141 1.83 1198 2.12 1252 2.42 1304 2.73 1354 3.04
6000 1217 873 0.63 941 0.88 1006 1.15 1068 1.43 1127 1.72 1183 2.03 1237 2.34 1290 2.65 1340 2.98 1389 3.31
6500 1318 935 0.75 998 1.02 1059 1.31 1117 1.61 1173 1.92 1227 2.24 1279 2.56 1330 2.90 1378 3.24 1426 3.58
7000 1420 997 0.89 1057 1.18 1114 1.49 1169 1.80 1222 2.13 1274 2.46 1324 2.81 1372 3.16 1419 3.52 1465 3.88
7500 1521 1060 1.05 1116 1.36 1170 1.68 1222 2.02 1273 2.36 1322 2.71 1370 3.07 1417 3.44 1462 3.81 1506 4.20
8000 1623 1123 1.23 1176 1.56 1227 1.90 1277 2.25 1325 2.61 1373 2.98 1418 3.35 1463 3.74 1507 4.13 1549 4.53
8500 1724 1187 1.44 1237 1.78 1286 2.14 1333 2.50 1379 2.88 1424 3.27 1468 3.66 1511 4.06 1553 4.47 1594 4.89
9000 1826 1251 1.66 1298 2.03 1345 2.40 1390 2.78 1434 3.18 1477 3.58 1519 3.99 1561 4.41 1601 4.84 1641 5.27
9500 1927 1315 1.91 1360 2.29 1404 2.69 1448 3.09 1490 3.50 1531 3.92 1572 4.35 1612 4.78 1651 5.22 1689 5.67
10000 2028 1379 2.19 1423 2.59 1465 3.00 1506 3.42 1547 3.85 1586 4.28 1626 4.73 1664 5.18 1702 5.64 1739 6.11
10500 2130 1444 2.49 1485 2.91 1526 3.34 1565 3.77 1604 4.22 1643 4.67 1680 5.14 1717 5.60 1754 6.08 1789 6.57
11000 2231 1509 2.82 1548 3.26 1587 3.71 1625 4.16 1663 4.62 1700 5.09 1736 5.57 1771 6.06 1807 6.55 1841 7.05
12000 2434 1639 3.57 1675 4.05 1711 4.53 1747 5.02 1781 5.52 1816 6.03 1849 6.54 1883 7.06 1916 7.59 1948 8.12
13000 2637 1769 4.45 1803 4.96 1837 5.49 1870 6.01 1902 6.55 1934 7.09 1966 7.64 1997 8.20 2028 8.76 2058 9.33
14000 2840 1900 5.47 1932 6.02 1963 6.58 1994 7.15 2024 7.72 2054 8.30 2084 8.88 2113 9.47 2142 10.07 2171 10.67
CFM OV 2 3/4" SP 3" SP 3 1/2" SP 4" SP 4 1/2" SP 5" SP 5 1/2" SP 6" SP 6 1/2" SP 7" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
6000 1217 1436 3.64 1482 3.99 1570 4.69 --------------
6300 1278 1457 3.82 1502 4.17 1589 4.90 --------------
6600 1339 1479 4.00 1523 4.36 1609 5.11 1690 5.87 ------------
6900 1400 1502 4.19 1545 4.56 1629 5.33 1709 6.11 1786 6.92 ----------
7200 1460 1525 4.38 1568 4.77 1650 5.55 1729 6.36 1805 7.19 1878 8.04 --------
7500 1521 1549 4.59 1591 4.98 1672 5.79 1750 6.61 1825 7.46 1897 8.33 1967 9.22 ------
7800 1582 1574 4.79 1615 5.20 1695 6.03 1772 6.87 1846 7.74 1917 8.63 1986 9.54 2052 10.46 ----
8100 1643 1600 5.01 1640 5.43 1719 6.27 1794 7.14 1867 8.03 1937 8.94 2005 9.87 2071 10.81 2135 11.77 - -
8400 1704 1626 5.24 1666 5.66 1743 6.53 1817 7.42 1889 8.33 1958 9.26 2025 10.21 2090 11.17 2154 12.15 2215 13.15
8700 1765 1653 5.47 1692 5.90 1768 6.79 1841 7.71 1911 8.64 1979 9.59 2046 10.55 2110 11.54 2173 12.54 2234 13.56
9000 1826 1680 5.71 1718 6.16 1793 7.07 1865 8.00 1934 8.95 2002 9.92 2067 10.91 2131 11.91 2193 12.93 2253 13.97
9300 1886 1708 5.96 1746 6.42 1819 7.35 1890 8.30 1958 9.27 2024 10.26 2089 11.27 2152 12.30 2213 13.34 2273 14.40
9600 1947 1737 6.22 1773 6.69 1845 7.64 1915 8.61 1982 9.61 2048 10.62 2111 11.65 2173 12.69 2234 13.75 2293 14.83
10100 2049 1785 6.67 1821 7.16 1891 8.14 1958 9.15 2024 10.18 2088 11.23 2150 12.29 2211 13.37 2270 14.47 - -
10600 2150 1835 7.16 1869 7.66 1937 8.68 2003 9.72 2067 10.78 2130 11.86 2190 12.96 2250 14.08 ----
11100 2252 1886 7.67 1919 8.18 1985 9.24 2049 10.31 2112 11.41 2173 12.53 2232 13.66 2290 14.81 ----
11600 2353 1938 8.21 1970 8.74 2034 9.83 2096 10.94 2157 12.07 2217 13.22 2275 14.39 ------
12100 2454 1991 8.78 2022 9.33 2084 10.45 2145 11.60 2204 12.76 2262 13.95 --------
12600 2556 2045 9.39 2075 9.96 2135 11.11 2194 12.29 2252 13.49 ----------
13100 2657 2099 10.03 2129 10.62 2188 11.81 2245 13.02 ------------
jWR2=InertialStartingForce
kMaximumRPMisbasedonoperatingtemperatureof100°F.
From101°Fthrough200°FmultiplyRPMby0.93.
Class Fan Weight
(Lbs.)
Wheel Weight
(Lbs.)
WR2j
(Lbs. Ft.2)
Max. Wheel RPMk
(Steel or Aluminum)
I408 66 34 1825
II 430 78 41 2294
60 3/4
(MAX)
43 1/8
34
33 3/8
26 1/4

YORK® MIXED FLOW, INLINE FAN, MODEL MFSI
15
245
Wheel Dia. Outlet Area Tip Speed (FPM) Maximum BHP Max. Motor Frame Size
30.0in. 5.98sq.ft. 7.86xRPM 2.66(RPM/1000)3326T
CFM OV 1/4" SP 1/2" SP 3/4" SP 1" SP 1 1/4" SP 1 1/2" SP 1 3/4" SP 2" SP 2 1/4" SP 2 1/2" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
3000 502 403 0.17 520 0.36 ----------------
3750 627 443 0.23 548 0.43 639 0.66 714 0.89 ------------
4500 753 488 0.29 582 0.52 666 0.77 741 1.04 810 1.33 872 1.62 --------
5250 878 540 0.38 623 0.63 700 0.91 772 1.20 836 1.50 903 1.87 955 2.17 1008 2.51 ----
6000 1003 594 0.49 667 0.76 739 1.07 806 1.38 870 1.73 925 2.05 982 2.42 1040 2.84 1085 3.18 1131 3.56
6750 1129 649 0.62 716 0.92 781 1.24 843 1.59 903 1.95 962 2.35 1011 2.69 1061 3.08 1112 3.52 1165 4.00
7500 1254 706 0.78 769 1.10 827 1.44 885 1.82 940 2.20 994 2.60 1049 3.05 1095 3.44 1139 3.84 1184 4.28
8250 1380 769 0.99 823 1.31 876 1.69 929 2.06 982 2.49 1032 2.91 1081 3.34 1130 3.81 1178 4.30 1217 4.72
9000 1505 832 1.23 877 1.55 928 1.95 977 2.36 1025 2.79 1074 3.26 1119 3.71 1164 4.17 1209 4.67 1255 5.22
9750 1630 894 1.52 933 1.83 982 2.25 1027 2.69 1072 3.14 1117 3.61 1161 4.12 1204 4.62 1245 5.10 1286 5.63
10500 1756 957 1.84 990 2.15 1036 2.59 1079 3.06 1121 3.54 1163 4.02 1204 4.53 1246 5.08 1286 5.63 1324 6.14
11250 1881 1020 2.21 1053 2.55 1091 2.97 1133 3.46 1172 3.97 1211 4.48 1250 5.00 1289 5.55 1328 6.14 1366 6.75
12000 2007 1083 2.62 1115 3.00 1147 3.40 1187 3.91 1225 4.44 1262 4.99 1298 5.53 1335 6.09 1371 6.67 1407 7.29
12750 2132 1146 3.08 1178 3.50 1203 3.86 1242 4.41 1279 4.96 1314 5.53 1348 6.12 1383 6.69 1417 7.28 1451 7.90
13500 2258 1209 3.60 1241 4.06 1266 4.45 1298 4.95 1334 5.54 1368 6.13 1400 6.74 1432 7.36 1465 7.96 1498 8.59
14250 2383 1272 4.17 1304 4.67 1328 5.10 1354 5.55 1389 6.16 1422 6.78 1453 7.41 1484 8.05 1515 8.71 1546 9.35
15000 2508 1336 4.79 1366 5.34 1391 5.80 1413 6.23 1444 6.83 1476 7.48 1507 8.14 1537 8.80 1566 9.49 1595 10.18
15750 2634 1399 5.48 1429 6.07 1454 6.57 1475 7.03 1500 7.56 1532 8.24 1562 8.92 1591 9.61 1619 10.32 1647 11.04
16500 2759 1462 6.23 1492 6.87 1517 7.41 1538 7.90 1557 8.36 1587 9.06 1617 9.77 1645 10.49 1673 11.21 1699 11.96
17250 2885 1525 7.04 1555 7.74 1580 8.32 1600 8.84 1619 9.33 1643 9.94 1672 10.68 1700 11.43 1727 12.18 1753 12.94
CFM OV 2 3/4" SP 3" SP 3 1/2" SP 4" SP 4 1/2" SP 5" SP 5 1/2" SP 6" SP 6 1/2" SP 7" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
7500 1254 1231 4.77 1278 5.30 1354 6.19 1428 7.14 ------------
8000 1338 1247 5.01 1290 5.51 1379 6.65 1447 7.55 1516 8.55 ----------
8500 1421 1269 5.33 1308 5.80 1389 6.86 1472 8.06 1535 9.02 1600 10.08 --------
9000 1505 1295 5.71 1332 6.17 1406 7.18 1483 8.33 1560 9.60 1620 10.61 1681 11.72 1744 12.93 ----
9500 1589 1319 6.05 1358 6.60 1427 7.57 1498 8.67 1572 9.91 1645 11.26 1702 12.32 1760 13.47 1819 14.72 - -
10000 1672 1339 6.34 1380 6.94 1453 8.04 1519 9.10 1587 10.28 1656 11.60 1728 13.05 1781 14.15 1836 15.34 1892 16.62
10500 1756 1362 6.68 1401 7.26 1480 8.55 1543 9.61 1606 10.75 1671 12.01 1738 13.39 1806 14.94 1858 16.11 1910 17.34
11000 1839 1388 7.08 1424 7.64 1499 8.89 1570 10.19 1630 11.30 1690 12.51 1752 13.84 1816 15.29 1881 16.89 1934 18.19
11500 1923 1415 7.51 1450 8.07 1520 9.29 1592 10.65 1656 11.94 1713 13.12 1771 14.39 1830 15.78 1891 17.29 1953 18.93
12000 2007 1444 7.95 1478 8.55 1544 9.74 1612 11.07 1681 12.54 1739 13.80 1794 15.05 1849 16.38 1906 17.83 1964 19.39
12500 2090 1471 8.34 1506 9.03 1571 10.25 1635 11.55 1700 12.98 1767 14.56 1819 15.79 1872 17.09 1925 18.49 1980 19.99
13000 2174 1500 8.77 1533 9.45 1598 10.82 1660 12.10 1722 13.50 1785 15.02 1847 16.61 1897 17.89 1948 19.26 1999 20.71
13500 2258 1530 9.24 1562 9.92 1627 11.38 1686 12.70 1746 14.07 1806 15.57 1867 17.19 1925 18.78 1973 20.12 2022 21.54
14000 2341 1561 9.74 1592 10.42 1654 11.87 1715 13.35 1772 14.71 1829 16.18 1887 17.76 1947 19.47 2000 21.07 2047 22.47
14500 2425 1592 10.28 1623 10.96 1683 12.41 1743 13.97 1799 15.41 1854 16.86 1910 18.41 1966 20.07 2023 21.87 2074 23.49
15000 2508 1625 10.85 1654 11.54 1712 12.99 1770 14.54 1827 16.16 1880 17.60 1934 19.13 1988 20.76 2043 22.51 - -
15500 2592 1658 11.45 1686 12.15 1743 13.60 1799 15.16 1855 16.82 1908 18.40 1960 19.92 2012 21.53 2064 23.24 - -
16000 2676 1691 12.08 1719 12.80 1774 14.26 1828 15.82 1883 17.47 1937 19.24 1987 20.77 2037 22.36 ----
16500 2759 1726 12.71 1752 13.48 1806 14.96 1859 16.52 1911 18.17 1964 19.93 2015 21.68 2064 23.26 ----
17000 2843 1761 13.37 1786 14.16 1838 15.69 1890 17.26 1941 18.92 1992 20.67 2043 22.53 ------
jWR2=InertialStartingForce
kMaximumRPMisbasedonoperatingtemperatureof100°F.
From101°Fthrough200°FmultiplyRPMby0.93.
Class Fan Weight
(Lbs.)
Wheel Weight
(Lbs.)
WR2j
(Lbs. Ft.2)
Max. Wheel RPMk
(Steel or Aluminum)
I482 81 52 1665
II 507 93 58 2082
PerformanceshownisforInstallationTypeB:freeinlet,ductedoutlet.Powerrating(BHP)doesnotincludebeltdrivelosses.Performanceratings
donotincludetheeffectsofappurtenancesintheairstream.Boldguresindicatemaximumstaticefciency.Approximatefanweightsareless
motorandaccessories.
63 3/4
(MAX)
47 7/8
38
36 3/8
28 3/4

YORK® MIXED FLOW, INLINE FAN, MODEL MFSI
16
270
Wheel Dia. Outlet Area Tip Speed (FPM) Maximum BHP Max. Motor Frame Size
33.0in. 7.27sq.ft. 8.64xRPM 4.32(RPM/1000)3326T
PerformanceshownisforInstallationTypeB:freeinlet,ductedoutlet.Powerrating(BHP)doesnotincludebeltdrivelosses.Performanceratings
donotincludetheeffectsofappurtenancesintheairstream.Boldguresindicatemaximumstaticefciency.Approximatefanweightsareless
motorandaccessories.
CFM OV 1/4" SP 1/2" SP 3/4" SP 1" SP 1 1/4" SP 1 1/2" SP 1 3/4" SP 2" SP 2 1/4" SP 2 1/2" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
4500 619 398 0.26 484 0.48 558 0.73 --------------
5000 688 420 0.31 504 0.55 574 0.81 639 1.09 ------------
5500 757 444 0.35 525 0.61 592 0.89 653 1.18 ------------
6000 825 469 0.41 546 0.69 612 0.98 671 1.29 726 1.62 ----------
6500 894 496 0.47 568 0.77 633 1.08 689 1.40 742 1.74 793 2.11 --------
7000 963 523 0.54 591 0.85 654 1.19 710 1.53 761 1.88 809 2.26 856 2.65 ------
7500 1032 552 0.62 615 0.95 676 1.30 730 1.66 780 2.03 827 2.42 872 2.82 916 3.24 959 3.68 - -
8000 1100 581 0.71 639 1.05 698 1.42 751 1.80 800 2.19 846 2.59 889 3.01 931 3.44 972 3.89 1013 4.36
8500 1169 611 0.82 665 1.16 721 1.55 773 1.95 821 2.36 866 2.78 908 3.21 949 3.65 988 4.11 1027 4.58
9000 1238 641 0.93 691 1.28 744 1.68 795 2.11 843 2.54 887 2.98 928 3.42 968 3.88 1006 4.35 1043 4.83
10000 1376 703 1.19 746 1.56 793 1.99 841 2.45 886 2.92 929 3.40 969 3.88 1008 4.37 1044 4.87 1079 5.38
11000 1513 765 1.51 803 1.90 845 2.35 888 2.83 932 3.34 973 3.86 1012 4.39 1049 4.92 1085 5.45 1119 6.00
12000 1651 829 1.88 863 2.30 900 2.76 939 3.27 979 3.81 1018 4.36 1056 4.93 1092 5.50 1127 6.08 1161 6.66
13000 1788 893 2.32 923 2.76 956 3.24 992 3.77 1028 4.33 1065 4.92 1101 5.52 1137 6.14 1171 6.75 1203 7.38
14000 1926 957 2.83 985 3.29 1015 3.79 1047 4.34 1080 4.92 1114 5.53 1149 6.17 1182 6.82 1215 7.48 1247 8.14
15000 2063 1022 3.41 1047 3.89 1075 4.42 1104 4.98 1134 5.59 1166 6.22 1197 6.88 1229 7.56 1261 8.26 1292 8.96
16000 2201 1086 4.06 1110 4.58 1136 5.13 1162 5.71 1190 6.33 1219 6.99 1248 7.67 1278 8.38 1308 9.10 1338 9.84
17000 2338 1151 4.81 1174 5.35 1197 5.92 1222 6.52 1247 7.16 1274 7.84 1301 8.54 1329 9.27 1357 10.03 1386 10.80
18000 2476 1217 5.64 1238 6.21 1260 6.80 1282 7.43 1306 8.09 1330 8.78 1356 9.50 1382 10.26 1408 11.03 1435 11.83
19000 2613 1282 6.57 1302 7.16 1322 7.78 1344 8.43 1366 9.11 1388 9.82 1412 10.56 1436 11.33 1461 12.13 1486 12.95
CFM OV 2 3/4" SP 3" SP 3 1/2" SP 4" SP 4 1/2" SP 5" SP 5 1/2" SP 6" SP 6 1/2" SP 7" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
9400 1293 1093 5.55 1128 6.08 1197 7.18 --------------
9800 1348 1107 5.79 1141 6.32 1208 7.43 --------------
10200 1403 1121 6.03 1155 6.57 1220 7.69 1283 8.87 ------------
10600 1458 1136 6.28 1169 6.83 1233 7.97 1295 9.16 ------------
11000 1513 1152 6.55 1184 7.11 1246 8.27 1307 9.47 1366 10.73 ----------
11500 1582 1172 6.89 1204 7.47 1265 8.65 1323 9.88 1381 11.16 1437 12.49 --------
12000 1651 1193 7.25 1224 7.84 1284 9.06 1341 10.31 1397 11.60 1452 12.95 1506 14.34 ------
12500 1719 1214 7.62 1244 8.23 1303 9.48 1360 10.76 1414 12.08 1468 13.44 1520 14.85 1572 16.31 ----
13000 1788 1235 8.01 1265 8.64 1323 9.92 1379 11.23 1433 12.57 1485 13.96 1536 15.38 1586 16.86 1636 18.38 - -
13500 1857 1256 8.40 1286 9.06 1344 10.37 1399 11.72 1451 13.09 1503 14.50 1552 15.95 1601 17.43 1650 18.97 1698 20.55
14000 1926 1278 8.81 1308 9.49 1365 10.85 1419 12.22 1471 13.63 1521 15.06 1570 16.53 1618 18.04 1665 19.59 1712 21.19
14500 1994 1300 9.24 1329 9.93 1386 11.33 1440 12.75 1491 14.19 1540 15.65 1588 17.15 1635 18.68 1682 20.25 1727 21.86
15000 2063 1322 9.67 1351 10.39 1407 11.83 1461 13.29 1511 14.76 1560 16.26 1608 17.79 1654 19.34 1699 20.93 1744 22.56
15500 2132 1344 10.13 1373 10.86 1429 12.34 1482 13.84 1532 15.36 1580 16.89 1627 18.45 1673 20.03 1717 21.65 1761 23.30
16000 2201 1367 10.59 1396 11.35 1451 12.87 1503 14.41 1553 15.97 1601 17.54 1647 19.13 1692 20.74 1736 22.39 1779 24.06
16500 2270 1390 11.08 1418 11.85 1473 13.42 1525 15.00 1574 16.59 1622 18.20 1667 19.83 1712 21.48 1755 23.15 1797 24.85
17000 2338 1414 11.58 1441 12.37 1495 13.98 1546 15.60 1595 17.24 1643 18.88 1688 20.55 1732 22.23 1775 23.94 1817 25.67
17500 2407 1437 12.10 1464 12.91 1517 14.56 1568 16.22 1617 17.90 1664 19.59 1709 21.29 1752 23.01 1795 24.75 1836 26.51
18000 2476 1461 12.64 1488 13.47 1540 15.15 1590 16.85 1639 18.57 1685 20.30 1730 22.05 1773 23.81 1815 25.58 - -
18500 2545 1486 13.21 1512 14.05 1563 15.76 1613 17.51 1661 19.27 1707 21.04 1751 22.82 1794 24.62 1836 26.43 - -
jWR2=InertialStartingForce
kMaximumRPMisbasedonoperatingtemperatureof100°F.
From101°Fthrough200°FmultiplyRPMby0.93.
Class Fan Weight
(Lbs.)
Wheel Weight
(Lbs.)
WR2j
(Lbs. Ft.2)
Max. Wheel RPMk
(Steel or Aluminum)
I 623 99 80 1476
II 656 114 88 1846
67 13/16
(MAX)
52 9/16
42
39 3/4
30 1/4

YORK® MIXED FLOW, INLINE FAN, MODEL MFSI
17
300
Wheel Dia. Outlet Area Tip Speed (FPM) Maximum BHP Max. Motor Frame Size
36.5in. 8.97sq.ft. 9.55xRPM 7.16(RPM/1000)3365T
CFM OV 1/4" SP 1/2" SP 3/4" SP 1" SP 1 1/4" SP 1 1/2" SP 1 3/4" SP 2" SP 2 1/4" SP 2 1/2" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
5200 580 350 0.30 429 0.56 ----------------
5800 647 369 0.35 446 0.63 511 0.94 - - ------------
6400 713 390 0.40 464 0.71 526 1.03 583 1.39 ------------
7000 780 412 0.46 483 0.79 543 1.14 597 1.50 649 1.90 ----------
7600 847 434 0.53 502 0.88 561 1.25 613 1.63 662 2.04 710 2.48 --------
8200 914 458 0.61 522 0.98 580 1.37 631 1.78 678 2.20 723 2.65 766 3.12 ------
8800 981 483 0.70 543 1.09 599 1.50 649 1.93 694 2.37 738 2.83 779 3.32 820 3.83 ----
9400 1048 509 0.80 564 1.20 618 1.64 667 2.09 712 2.56 754 3.03 794 3.53 833 4.05 871 4.60 - -
10000 1115 535 0.92 586 1.33 638 1.79 686 2.27 730 2.75 771 3.25 810 3.76 847 4.29 884 4.85 920 5.42
11000 1226 579 1.13 624 1.57 672 2.06 719 2.57 761 3.10 801 3.64 839 4.18 875 4.74 909 5.32 943 5.91
12000 1338 625 1.39 665 1.84 708 2.36 752 2.91 794 3.48 833 4.05 869 4.64 904 5.23 937 5.83 969 6.45
13000 1449 671 1.69 707 2.16 746 2.70 787 3.28 827 3.89 865 4.50 900 5.13 934 5.76 967 6.40 998 7.05
14000 1561 717 2.04 750 2.53 786 3.09 823 3.69 861 4.33 898 4.99 933 5.65 966 6.33 998 7.00 1028 7.69
15000 1672 764 2.43 794 2.95 827 3.52 861 4.15 896 4.82 931 5.51 965 6.22 998 6.93 1029 7.65 1059 8.37
16000 1784 812 2.88 839 3.42 869 4.02 900 4.66 933 5.35 966 6.07 999 6.82 1031 7.57 1062 8.33 1091 9.10
17000 1895 859 3.39 885 3.95 912 4.57 941 5.23 972 5.94 1003 6.69 1034 7.46 1065 8.25 1094 9.05 1123 9.86
18000 2007 907 3.95 931 4.54 956 5.18 983 5.86 1011 6.59 1040 7.36 1070 8.16 1099 8.98 1128 9.82 1156 10.67
19000 2118 955 4.58 977 5.20 1001 5.85 1026 6.56 1052 7.31 1079 8.09 1107 8.92 1135 9.77 1163 10.64 1190 11.53
20000 2230 1003 5.28 1024 5.92 1046 6.60 1069 7.32 1094 8.09 1119 8.90 1145 9.74 1172 10.62 1198 11.52 1225 12.44
21000 2341 1051 6.04 1071 6.71 1092 7.41 1114 8.16 1136 8.94 1160 9.77 1185 10.64 1209 11.54 1235 12.46 1260 13.41
CFM OV 2 3/4" SP 3" SP 3 1/2" SP 4" SP 4 1/2" SP 5" SP 5 1/2" SP 6" SP 6 1/2" SP 7" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
11500 1282 988 6.80 1020 7.44 1082 8.78 --------------
12000 1338 1001 7.09 1032 7.74 1092 9.09 --------------
12500 1394 1014 7.39 1044 8.05 1103 9.42 1161 10.87 ------------
13000 1449 1028 7.71 1058 8.38 1115 9.78 1171 11.24 1226 12.77 ----------
13500 1505 1043 8.04 1072 8.73 1128 10.14 1183 11.62 1236 13.17 ----------
14000 1561 1058 8.38 1086 9.09 1142 10.53 1195 12.03 1247 13.59 1298 15.21 --------
14500 1616 1073 8.74 1101 9.46 1155 10.93 1208 12.45 1259 14.03 1309 15.67 1358 17.38 ------
15000 1672 1088 9.10 1116 9.84 1170 11.35 1221 12.90 1271 14.49 1320 16.15 1368 17.87 1416 19.65 ----
15500 1728 1104 9.48 1131 10.24 1184 11.78 1235 13.36 1284 14.98 1332 16.65 1379 18.38 1425 20.17 ----
16000 1784 1119 9.87 1147 10.65 1199 12.22 1250 13.83 1298 15.48 1345 17.18 1391 18.92 1436 20.73 1481 22.59 - -
16500 1839 1135 10.27 1163 11.06 1215 12.68 1264 14.32 1312 16.00 1358 17.72 1403 19.49 1448 21.31 1491 23.19 1535 25.12
17000 1895 1151 10.68 1178 11.49 1230 13.15 1279 14.82 1326 16.53 1372 18.28 1416 20.08 1460 21.92 1503 23.81 1545 25.75
17500 1951 1167 11.10 1194 11.93 1246 13.63 1294 15.34 1341 17.09 1386 18.86 1430 20.68 1472 22.54 1514 24.45 1556 26.41
18000 2007 1184 11.53 1210 12.39 1261 14.12 1310 15.87 1356 17.65 1400 19.46 1443 21.31 1486 23.19 1527 25.12 1568 27.10
19000 2118 1217 12.42 1243 13.32 1293 15.14 1341 16.98 1386 18.83 1430 20.71 1472 22.62 1513 24.56 1553 26.54 1593 28.56
20000 2230 1251 13.37 1276 14.31 1325 16.21 1372 18.13 1417 20.06 1460 22.02 1502 23.99 1542 26.00 1581 28.03 1620 30.10
21000 2341 1285 14.38 1310 15.35 1358 17.33 1405 19.33 1449 21.35 1491 23.38 1532 25.44 1572 27.51 1611 29.61 1648 31.74
22000 2453 1321 15.44 1345 16.45 1392 18.51 1437 20.59 1481 22.69 1523 24.81 1563 26.94 1603 29.09 1641 31.26 - -
23000 2564 1357 16.58 1380 17.62 1426 19.75 1470 21.91 1513 24.09 1555 26.29 1595 28.50 1634 30.73 ----
24000 2676 1394 17.80 1417 18.86 1461 21.05 1504 23.28 1546 25.55 1587 27.83 1627 30.13 ------
jWR2=InertialStartingForce
kMaximumRPMisbasedonoperatingtemperatureof100°F.
From101°Fthrough200°FmultiplyRPMby0.93.
Class Fan Weight
(Lbs.)
Wheel Weight
(Lbs.)
WR2j
(Lbs. Ft.2)
Max. Wheel RPMk
(Steel or Aluminum)
I853 140 130 1330
II 898 165 144 1662
PerformanceshownisforInstallationTypeB:freeinlet,ductedoutlet.Powerrating(BHP)doesnotincludebeltdrivelosses.Performanceratings
donotincludetheeffectsofappurtenancesintheairstream.Boldguresindicatemaximumstaticefciency.Approximatefanweightsareless
motorandaccessories.
74 3/8
(MAX)
57 3/4
47 1/2
44 7/8
35 1/8

YORK® MIXED FLOW, INLINE FAN, MODEL MFSI
18
330
Wheel Dia. Outlet Area Tip Speed (FPM) Maximum BHP Max. Motor Frame Size
40.25in. 10.8sq.ft. 10.54xRPM 11.68(RPM/1000)3365T
PerformanceshownisforInstallationTypeB:freeinlet,ductedoutlet.Powerrating(BHP)doesnotincludebeltdrivelosses.Performanceratings
donotincludetheeffectsofappurtenancesintheairstream.Boldguresindicatemaximumstaticefciency.Approximatefanweightsareless
motorandaccessories.
CFM OV 1/4" SP 1/2" SP 3/4" SP 1" SP 1 1/4" SP 1 1/2" SP 1 3/4" SP 2" SP 2 1/4" SP 2 1/2" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
6500 602 321 0.38 393 0.70 455 1.06 --------------
7200 667 339 0.43 408 0.78 466 1.16 --------------
7900 731 357 0.50 424 0.87 480 1.27 531 1.71 ------------
8600 796 376 0.57 440 0.97 494 1.40 543 1.85 590 2.33 ----------
9300 861 396 0.65 457 1.08 510 1.53 557 2.00 602 2.50 644 3.03 --------
10000 926 416 0.75 474 1.20 526 1.68 572 2.17 615 2.68 656 3.23 695 3.81 ------
11000 1019 447 0.90 500 1.38 550 1.90 595 2.43 636 2.98 675 3.54 712 4.14 748 4.76 ----
12000 1111 480 1.08 527 1.58 575 2.14 618 2.71 658 3.29 696 3.89 731 4.51 765 5.16 799 5.83 832 6.52
13000 1204 513 1.29 555 1.81 600 2.40 642 3.01 682 3.64 718 4.27 752 4.92 785 5.59 817 6.28 848 6.99
14000 1296 546 1.53 585 2.07 626 2.68 667 3.34 705 4.00 741 4.68 775 5.36 807 6.06 837 6.78 867 7.52
15000 1389 580 1.81 615 2.37 654 3.00 692 3.69 730 4.39 765 5.11 798 5.84 829 6.57 859 7.32 888 8.08
16000 1481 615 2.12 647 2.70 682 3.35 719 4.07 755 4.81 789 5.57 821 6.34 852 7.11 881 7.89 909 8.69
17000 1574 650 2.47 679 3.07 712 3.74 746 4.48 780 5.26 813 6.05 845 6.86 875 7.68 904 8.50 932 9.33
18000 1667 685 2.86 712 3.48 742 4.18 774 4.93 806 5.74 839 6.57 870 7.42 899 8.28 928 9.14 955 10.01
19000 1759 720 3.29 746 3.94 773 4.65 803 5.43 834 6.26 864 7.12 894 8.01 924 8.91 952 9.81 979 10.73
20000 1852 755 3.77 779 4.44 805 5.17 833 5.97 862 6.82 891 7.71 920 8.63 948 9.57 976 10.52 1002 11.47
21000 1944 791 4.30 813 4.99 838 5.74 864 6.56 891 7.43 918 8.35 946 9.30 974 10.27 1001 11.26 1027 12.25
22000 2037 826 4.87 848 5.59 871 6.37 895 7.20 920 8.09 947 9.03 973 10.01 1000 11.01 1026 12.03 1051 13.07
23000 2130 862 5.50 882 6.25 904 7.04 927 7.90 951 8.81 976 9.76 1001 10.76 1026 11.80 1052 12.85 1076 13.93
24000 2222 898 6.19 917 6.95 938 7.78 959 8.65 982 9.58 1005 10.55 1029 11.58 1054 12.63 1078 13.72 1102 14.83
CFM OV 2 3/4" SP 3" SP 3 1/2" SP 4" SP 4 1/2" SP 5" SP 5 1/2" SP 6" SP 6 1/2" SP 7" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
15000 1389 916 8.86 943 9.66 997 11.32 1050 13.08 ------------
15500 1435 926 9.18 953 9.99 1006 11.67 1057 13.43 ------------
16000 1481 937 9.50 963 10.32 1015 12.03 1065 13.81 1115 15.68 ----------
16500 1528 948 9.83 974 10.67 1025 12.40 1074 14.20 1122 16.08 ----------
17000 1574 959 10.18 985 11.03 1035 12.79 1083 14.61 1130 16.50 1177 18.48 --------
17500 1620 970 10.53 996 11.40 1045 13.19 1093 15.03 1139 16.94 1185 18.93 1230 21.00 ------
18000 1667 981 10.89 1007 11.78 1056 13.60 1103 15.47 1148 17.40 1193 19.40 1237 21.49 ------
18500 1713 993 11.27 1018 12.17 1066 14.02 1113 15.92 1158 17.87 1202 19.90 1245 21.99 1287 24.16 ----
19000 1759 1004 11.65 1029 12.57 1077 14.46 1123 16.38 1168 18.36 1211 20.41 1253 22.52 1295 24.70 1336 26.96 - -
20000 1852 1028 12.43 1053 13.40 1100 15.36 1145 17.35 1188 19.39 1230 21.48 1271 23.63 1312 25.84 1351 28.12 1391 30.47
21000 1944 1052 13.26 1076 14.26 1123 16.30 1167 18.36 1210 20.47 1251 22.61 1291 24.81 1330 27.06 1368 29.37 1406 31.74
22000 2037 1076 14.11 1100 15.16 1146 17.28 1190 19.42 1232 21.60 1272 23.80 1311 26.05 1349 28.35 1387 30.71 1424 33.11
23000 2130 1101 15.01 1125 16.10 1170 18.30 1213 20.53 1255 22.77 1294 25.05 1333 27.36 1370 29.72 1407 32.12 1442 34.57
24000 2222 1126 15.95 1149 17.08 1194 19.37 1237 21.67 1278 24.00 1317 26.35 1355 28.73 1391 31.14 1427 33.60 1462 36.10
25000 2315 1151 16.93 1174 18.10 1218 20.47 1261 22.86 1301 25.26 1340 27.69 1377 30.15 1414 32.63 1449 35.15 1483 37.70
26000 2407 1178 17.97 1200 19.17 1243 21.61 1285 24.09 1325 26.58 1363 29.09 1400 31.62 1436 34.18 1471 36.76 1505 39.38
27000 2500 1204 19.05 1226 20.29 1268 22.81 1309 25.36 1349 27.94 1387 30.53 1424 33.14 1459 35.77 1493 38.43 - -
28000 2593 1231 20.20 1252 21.47 1294 24.05 1334 26.68 1373 29.34 1411 32.02 1447 34.71 1482 37.42 ----
29000 2685 1259 21.41 1279 22.70 1320 25.35 1359 28.06 1398 30.79 1435 33.55 1471 36.33 1506 39.13 ----
30000 2778 1288 22.69 1307 24.01 1346 26.71 1385 29.48 1423 32.30 1459 35.14 1495 38.00 ------
jWR2=InertialStartingForce
kMaximumRPMisbasedonoperatingtemperatureof100°F.
From101°Fthrough200°FmultiplyRPMby0.93.
Class Fan Weight
(Lbs.)
Wheel Weight
(Lbs.)
WR2j
(Lbs. Ft.2)
Max. Wheel RPMk
(Steel or Aluminum)
I 999 184 221 1208
II 1052 212 230 1510
78 7/16
(MAX)
63 3/4
53
49
38 7/8

YORK® MIXED FLOW, INLINE FAN, MODEL MFSI
19
365
Wheel Dia. Outlet Area Tip Speed (FPM) Maximum BHP Max. Motor Frame Size
44.5in. 13.3sq.ft. 11.65xRPM 19.3(RPM/1000)3365T
CFM OV 1/4" SP 1/2" SP 3/4" SP 1" SP 1 1/4" SP 1 1/2" SP 1 3/4" SP 2" SP 2 1/4" SP 2 1/2" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
8000 602 292 0.46 356 0.86 412 1.31 --------------
9000 677 310 0.55 372 0.98 424 1.45 --------------
10000 752 329 0.64 389 1.12 439 1.62 485 2.15 ------------
11000 827 350 0.75 407 1.26 455 1.80 499 2.36 539 2.96 ----------
12000 902 372 0.88 425 1.42 472 2.00 514 2.60 553 3.22 590 3.88 --------
13000 977 394 1.03 444 1.60 490 2.22 531 2.85 568 3.50 604 4.19 638 4.91 672 5.66 ----
14000 1053 418 1.20 463 1.79 508 2.45 548 3.12 584 3.81 619 4.52 652 5.26 683 6.03 715 6.84 - -
15000 1128 442 1.39 483 2.00 526 2.69 565 3.41 601 4.14 635 4.88 666 5.65 697 6.44 727 7.27 756 8.12
16500 1241 479 1.72 515 2.37 554 3.10 592 3.87 627 4.66 660 5.47 690 6.28 720 7.12 748 7.97 775 8.86
18000 1353 516 2.11 549 2.79 584 3.56 620 4.38 654 5.24 686 6.10 716 6.97 744 7.86 771 8.76 798 9.68
19500 1466 555 2.57 584 3.28 616 4.08 649 4.95 681 5.85 712 6.78 742 7.71 770 8.66 796 9.62 822 10.59
21000 1579 593 3.10 620 3.84 649 4.67 679 5.57 710 6.53 740 7.51 768 8.51 796 9.52 822 10.53 847 11.56
22500 1692 632 3.71 656 4.48 683 5.33 711 6.27 739 7.27 768 8.30 796 9.36 822 10.43 848 11.50 872 12.59
24000 1805 671 4.39 694 5.20 718 6.08 743 7.05 770 8.08 797 9.16 824 10.27 850 11.40 875 12.54 899 13.69
25500 1917 711 5.16 731 6.00 754 6.92 777 7.91 802 8.98 827 10.09 853 11.25 878 12.43 902 13.63 926 14.84
27000 2030 750 6.02 770 6.90 790 7.85 812 8.88 835 9.96 858 11.11 882 12.31 906 13.54 930 14.80 953 16.07
28500 2143 790 6.98 808 7.90 827 8.88 848 9.94 869 11.05 891 12.23 913 13.46 936 14.74 959 16.04 981 17.36
30000 2256 830 8.04 847 9.00 865 10.02 884 11.10 903 12.25 924 13.45 945 14.72 967 16.03 988 17.37 1010 18.75
31500 2368 870 9.21 886 10.21 903 11.26 920 12.38 939 13.55 958 14.79 978 16.08 998 17.42 1019 18.80 1039 20.22
33000 2481 909 10.49 925 11.53 941 12.62 958 13.77 975 14.97 993 16.24 1011 17.56 1031 18.93 1050 20.34 1070 21.80
CFM OV 2 3/4" SP 3" SP 3 1/2" SP 4" SP 4 1/2" SP 5" SP 5 1/2" SP 6" SP 6 1/2" SP 7" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
18000 1353 823 10.63 848 11.60 898 13.62 --------------
19000 1429 838 11.25 863 12.24 910 14.30 957 16.46 ------------
20000 1504 854 11.91 878 12.93 924 15.03 969 17.22 1013 19.52 ----------
21000 1579 871 12.59 894 13.65 939 15.80 983 18.04 1025 20.36 1067 22.78 --------
22000 1654 888 13.31 911 14.40 955 16.62 997 18.90 1038 21.27 1079 23.72 1119 26.26 ------
23000 1729 905 14.06 927 15.19 971 17.47 1013 19.81 1053 22.22 1092 24.71 1131 27.28 1169 29.95 ----
24000 1805 922 14.84 944 16.01 987 18.36 1028 20.77 1068 23.23 1106 25.76 1144 28.37 1181 31.06 1217 33.84 - -
25000 1880 940 15.65 962 16.85 1004 19.29 1045 21.76 1083 24.29 1121 26.87 1158 29.52 1194 32.25 1229 35.05 1264 37.93
26000 1955 957 16.48 979 17.73 1021 20.24 1061 22.79 1100 25.38 1137 28.03 1172 30.73 1208 33.49 1242 36.33 1276 39.24
27000 2030 975 17.35 997 18.64 1039 21.23 1078 23.86 1116 26.52 1152 29.23 1188 31.99 1222 34.80 1256 37.68 1289 40.63
28000 2105 994 18.24 1015 19.57 1056 22.26 1096 24.96 1133 27.70 1169 30.47 1204 33.29 1237 36.17 1271 39.09 1303 42.08
29000 2180 1012 19.17 1033 20.54 1074 23.31 1113 26.10 1150 28.91 1186 31.76 1220 34.65 1253 37.58 1286 40.56 1318 43.60
30000 2256 1031 20.14 1052 21.55 1092 24.40 1130 27.27 1167 30.17 1202 33.09 1236 36.05 1269 39.05 1301 42.09 1333 45.18
31000 2331 1050 21.15 1070 22.59 1110 25.52 1148 28.48 1185 31.46 1220 34.46 1253 37.49 1286 40.56 1318 43.67 - -
32000 2406 1069 22.19 1089 23.67 1128 26.68 1166 29.72 1202 32.78 1237 35.87 1270 38.98 1303 42.12 1334 45.29 - -
33000 2481 1089 23.29 1109 24.80 1147 27.87 1184 30.99 1220 34.14 1254 37.31 1288 40.50 1320 43.72 ----
34000 2556 1109 24.43 1128 25.97 1166 29.11 1203 32.31 1238 35.54 1272 38.80 1305 42.07 1337 45.37 ----
35000 2632 1130 25.62 1148 27.19 1185 30.40 1221 33.67 1256 36.98 1290 40.32 1322 43.68 ------
36000 2707 1151 26.87 1169 28.46 1204 31.73 1240 35.07 1274 38.46 1308 41.88 1340 45.32 ------
37000 2782 1172 28.17 1189 29.79 1224 33.11 1259 36.52 1293 39.99 1326 43.49 --------
jWR2=InertialStartingForce
kMaximumRPMisbasedonoperatingtemperatureof100°F.
From101°Fthrough200°FmultiplyRPMby0.93.
Class Fan Weight
(Lbs.)
Wheel Weight
(Lbs.)
WR2j
(Lbs. Ft.2)
Max. Wheel RPMk
(Steel or Aluminum)
I 1101 239 338 1072
II 1159 257 348 1341
PerformanceshownisforInstallationTypeB:freeinlet,ductedoutlet.Powerrating(BHP)doesnotincludebeltdrivelosses.Performanceratings
donotincludetheeffectsofappurtenancesintheairstream.Boldguresindicatemaximumstaticefciency.Approximatefanweightsareless
motorandaccessories.
83 1/8
(MAX)
70 1/2
59
53 3/4
42 5/8

YORK® MIXED FLOW, INLINE FAN, MODEL MFSI
20
402
Wheel Dia. Outlet Area Tip Speed (FPM) Maximum BHP Max. Motor Frame Size
49.0in. 16.1sq.ft. 12.83xRPM 31.26(RPM/1000)3365T
PerformanceshownisforInstallationTypeB:freeinlet,ductedoutlet.Powerrating(BHP)doesnotincludebeltdrivelosses.Performanceratings
donotincludetheeffectsofappurtenancesintheairstream.Boldguresindicatemaximumstaticefciency.Approximatefanweightsareless
motorandaccessories.
CFM OV 1/4" SP 1/2" SP 3/4" SP 1" SP 1 1/4" SP 1 1/2" SP 1 3/4" SP 2" SP 2 1/4" SP 2 1/2" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
10000 621 269 0.59 327 1.08 376 1.62 --------------
11200 696 286 0.69 341 1.23 388 1.80 432 2.44 ------------
12400 770 303 0.81 357 1.39 402 2.01 443 2.67 482 3.38 ----------
13600 845 322 0.95 373 1.57 417 2.23 456 2.92 492 3.66 528 4.45 --------
14800 919 342 1.10 389 1.77 432 2.48 470 3.21 505 3.97 538 4.78 571 5.64 ------
16000 994 362 1.28 406 1.98 448 2.74 485 3.52 519 4.32 551 5.15 582 6.03 612 6.95 ----
18000 1118 398 1.64 436 2.39 475 3.22 511 4.08 544 4.95 574 5.85 603 6.77 631 7.73 658 8.73 685 9.76
20000 1242 435 2.09 468 2.87 503 3.76 538 4.70 570 5.65 599 6.62 627 7.61 654 8.63 679 9.67 704 10.74
22000 1366 472 2.61 501 3.43 533 4.37 565 5.38 596 6.42 625 7.47 652 8.54 678 9.62 703 10.72 726 11.84
24000 1491 511 3.24 537 4.10 565 5.08 595 6.14 624 7.25 652 8.39 678 9.54 703 10.70 727 11.87 751 13.06
26000 1615 549 3.97 573 4.87 598 5.89 625 7.00 652 8.17 679 9.38 705 10.61 730 11.86 753 13.11 776 14.38
28000 1739 588 4.81 609 5.76 632 6.81 657 7.96 682 9.19 708 10.46 733 11.77 757 13.10 780 14.44 802 15.78
30000 1863 627 5.77 647 6.77 668 7.87 690 9.05 714 10.32 737 11.65 761 13.03 784 14.43 807 15.85 828 17.28
32000 1988 667 6.87 685 7.92 704 9.05 725 10.27 746 11.58 768 12.96 790 14.39 812 15.86 834 17.36 855 18.87
34000 2112 706 8.10 723 9.20 741 10.38 760 11.64 779 12.99 800 14.40 821 15.88 842 17.41 863 18.98 883 20.56
36000 2236 746 9.48 762 10.63 778 11.85 796 13.16 814 14.54 833 16.00 852 17.52 872 19.10 892 20.72 911 22.38
38000 2360 786 11.01 801 12.22 816 13.49 832 14.84 849 16.26 867 17.75 885 19.31 903 20.94 922 22.61 941 24.32
40000 2484 826 12.71 840 13.97 854 15.29 869 16.68 885 18.14 902 19.67 918 21.27 936 22.94 953 24.65 971 26.42
42000 2609 866 14.59 879 15.89 893 17.27 907 18.70 922 20.21 937 21.78 953 23.41 969 25.11 986 26.87 1002 28.68
44000 2733 906 16.64 918 18.00 931 19.42 945 20.91 959 22.45 973 24.06 988 25.74 1003 27.48 1019 29.28 1034 31.13
CFM OV 2 3/4" SP 3" SP 3 1/2" SP 4" SP 4 1/2" SP 5" SP 5 1/2" SP 6" SP 6 1/2" SP 7" SP
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
21000 1304 739 12.40 762 13.56 808 15.99 --------------
22200 1379 752 13.12 774 14.30 819 16.76 862 19.36 ------------
23400 1453 766 13.87 788 15.09 830 17.60 872 20.23 913 22.99 ----------
24600 1528 780 14.67 802 15.92 843 18.49 884 21.16 923 23.95 ----------
25800 1602 795 15.51 816 16.80 857 19.43 896 22.16 934 24.99 972 27.93 --------
27000 1677 810 16.38 831 17.71 871 20.42 909 23.21 947 26.09 983 29.07 1019 32.17
28200 1752 826 17.29 846 18.67 886 21.46 923 24.32 960 27.26 995 30.29 1030 33.41 1064 36.65 1098 40.00
29400 1826 841 18.23 862 19.66 901 22.54 938 25.47 973 28.48 1008 31.57 1042 34.74 1075 38.01 1108 41.38 1140 44.86
30600 1901 857 19.21 877 20.68 916 23.66 952 26.68 987 29.76 1021 32.91 1054 36.14 1087 39.45 1119 42.86 1151 46.36
31800 1975 873 20.22 893 21.74 931 24.81 967 27.93 1002 31.09 1035 34.31 1068 37.60 1100 40.97 1131 44.42 1162 47.96
33000 2050 889 21.27 909 22.84 947 26.01 983 29.22 1017 32.46 1050 35.76 1082 39.12 1113 42.55 1143 46.05 1173 49.64
34200 2124 906 22.35 925 23.97 963 27.24 998 30.55 1032 33.89 1065 37.27 1096 40.70 1127 44.20 1157 47.76 1186 51.40
35400 2199 922 23.48 942 25.15 979 28.52 1014 31.92 1047 35.35 1080 38.82 1111 42.34 1141 45.91 1170 49.54 1199 53.24
36600 2273 939 24.64 958 26.36 995 29.83 1030 33.33 1063 36.86 1095 40.43 1126 44.03 1156 47.68 1185 51.38 1213 55.14
37800 2348 957 25.86 975 27.62 1011 31.18 1046 34.79 1079 38.42 1110 42.08 1141 45.77 1170 49.51 1199 53.29 - -
39000 2422 974 27.13 992 28.93 1028 32.58 1062 36.28 1094 40.02 1126 43.78 1156 47.56 1185 51.39 1214 55.25 - -
40200 2497 992 28.45 1010 30.28 1044 34.03 1078 37.83 1110 41.66 1142 45.52 1172 49.40 1201 53.32 ----
41400 2571 1010 29.82 1027 31.70 1061 35.52 1095 39.41 1127 43.34 1158 47.30 1187 51.29 ------
42600 2646 1029 31.26 1045 33.17 1079 37.07 1111 41.05 1143 45.08 1174 49.14 1203 53.22 ------
43800 2720 1047 32.77 1064 34.71 1096 38.68 1128 42.74 1159 46.86 1190 51.02 --------
jWR2=InertialStartingForce
kMaximumRPMisbasedonoperatingtemperatureof100°F.
From101°Fthrough200°FmultiplyRPMby0.93.
Class Fan Weight
(Lbs.)
Wheel Weight
(Lbs.)
WR2j
(Lbs. Ft.2)
Max. Wheel RPMk
(Steel or Aluminum)
I4583 286 491 973
II 1666 324 506 1216
89 3/4
(MAX)
77 1/8
65 3/4
59 11/16
47 1/2