Heatilator BIR50-B User manual

1
Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
WOODBURNING FIREPLACE
Fire Risk.
WARNING
For use with solid wood fuel only.
Other fuels may overre and generate poisonous
gases (i.e. carbon monoxide).
Model(s):
Installation Manual
Installation and Fireplace Setup
WARNING
HOT SURFACES!
Glass and other surfaces are hot during
operation AND cool down.
Hot glass will cause burns.
• DO NOT touch glass until it is cooled
• NEVERallowchildrentotouchglass
• Keepchildrenaway
• CAREFULLY SUPERVISE children in same room as
replace.
• Alertchildrenandadultstohazardsofhightemperatures.
High temperatures may ignite clothing or other ammable
materials.
• Keep clothing, furniture, draperies and other ammable
materialsaway.
INSTALLER: Leave this manual with party responsible for use and operation.
OWNER: Retain this manual for future reference.
BIR50-B
NOTICE: DO NOT discard this manual!
• DO NOTstoreorusegasolineorotheram-
mablevaporsandliquidsinthevicinityofthis
oranyotherappliance.
• DO NOToverre.Overringwillvoidyour
warranty.
• Complywithallminimumclearancestocom-
bustiblesasspecied.Failuretocomplymay
causehousere.
WARNING: If the information in these
instructions is not followed exactly, a re
or explosion may result causing property
damage, personal injury, or death.
Installation and service of this
appliance should be performed by
qualiedpersonnel.Hearth&Home
Technologies recommends HHT
Factory Trained or NFI certified
professionals.

2Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
Safety Alert Key:
• DANGER! Indicatesahazardoussituationwhich,ifnotavoidedwillresultindeathorseriousinjury.
• WARNING!Indicatesahazardoussituationwhich,ifnotavoidedcouldresultindeathorseriousinjury.
• CAUTION! Indicatesahazardoussituationwhich,ifnotavoided,couldresultinminorormoderateinjury.
• NOTICE:Indicatespracticeswhichmaycausedamagetothereplaceortoproperty.
Table of Contents
1 Product Specic & Important Safety Information
A.ApplianceCertication 4
B.Non-CombustibleMaterials 4
C.CombustibleMaterials 4
2 Getting Started
A.TypicalFireplaceSystem 5
B.DesignandInstallationConsiderations 6
1.SelectingFireplaceLocations 6
2.LocatingFireplace&Chimney 7
C.ToolsandSuppliesNeeded 8
D.InspectFireplaceandComponents 8
E.FireplaceSystemRequirements 8
3 Framing and Clearances
A.FireplaceDimensions 9
B.Clearances 10
MinimumClearancestoCombustibles 10
C.ConstructtheChase 11
D.FrametheFireplace 12
E.SecureandLeveltheFireplace 13
F. ProtectiveMetalHearthStrips 13
G.OutsideAirKit 14
4 Chimney and Termination Installation
A.ChimneyRequirements 15
B.Clearances 17
C.InstallationNotes 17
D.FrameOpenings 17
E.CutRoofOpening 17
F. InstallFirestop 17
G.AssembleChimneySections 18
H.UsingOffsets/Returns 18
I. OffsetElbowInstallation 19
J. SupplementarySupport&Stabilizer 19
K.InstallAtticInsulationShield 20
L. InstallRoofRadiationShields 20
M.AttachFlashing 20
Field-ConstructedChaseTopFlashing 21
N.FinishTop 22
O.ChimneyTerminationRequirements 23
5 Shrouds
A.ShroudRequirements 24
B.HouseStyleShroud 25
C.Arch/MailboxStyleShroud 26
D.PyramidStyleShroud 26
6 Finishing
A.FinishingMaterial 27
B.HearthExtension,BuildingandFinishing 29
1.FireplaceInstalledFlushontheFloor
 andHearthExtensionRaisedto
 BottomofFireboxOpening 29
2.RaisedHearthExtensionandRaisedFireplace 30
3.FireplaceOpeningandHearthExtensionFlush
 withtheFloor 31
C.Non-CombustibleSealantMaterial 31
D.Sidewalls/Surrounds 32
E.MantelandWallProjections 32
7 Fireplace Setup
A.InstallHearthMoldedBrickPanel 33
B.InstallBackMoldedBrickPanel 33
C.InstallSideMoldedBrickPanel 33
D.InstallScreens 34
E.InstallMortar(Optional) 34
F.Grate 34
G.GasLog/LighterProvision 35
H.WoodBurningInserts 35
8 Reference Materials
A.ChimneyComponents 36
B.OptionalComponents 36
►

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Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
Customer:
Lot/Address
Model (circle one): BIR50-B
YES IF NO, WHY?
WARNING! Risk of Fire or Explosion! Failure to install fireplace acording to these instructions can lead to a fire or
explosion.
Verifiedthatthechaseisinsulatedandventilated(Pg.11)
Verifiedclearancestocombustibles.(Pg.10)
Fireplaceisleveledandsecured.(Pg.13)
Hearthextensionsize/heightdecided.(Pg.29)
Outsideairkitinstalled.(Pg.14)
Chimneyconfigurationcomplieswithdiagrams.
Firestopsinstalled.
Roofflashinginstalled.
Chimneyinstalled,lockedandsecuredinplacewithproperclearance.
Terminationsinstalled.
Installer:
Shrouds Section 5 (Pg. 24)
Shroudsproperlyinstalledperinstructions.
Dealer/Distributor Phone #
Serial #:
Chimney Section 4 (Pg. 15)
Fireplace Install
Protectivehearthstripsinstalledpermanualrequirements.(Pg.13)
Attic insulation shield installed.
ATTENTION INSTALLER:
Follow this Standard Work Checklist
Thisstandardworkchecklististobeusedbytheinstallerinconjuctionwith,notinsteadof,theinstructionscontainedinthis installation
manual.
Date Installed:
Location of Fireplace:
4059-704•RevC•4-17-13
Commentscommunicatedtopartyresponsible
Combustiblematerialsnotinstalledinnon-combustibleareas.
Verifiedallclearancesmeetinstallationmanualrequirements.
Mantelsandwallprojectionscomplywithinstallationmanualrequirements.
Allpackagingandprotectivematerialsremoved.
Fireplace Setup Section 7 (Pg. 33)
__________________________by______________________on________
Moldedbrickpanelsinstalledcorrectly.
Optionaldoorsproperlyinstalled.
•Photographingtheinstallationandcopyingthischecklistforyourfile.
•Thatthischecklistremainvisibleatalltimesonthefireplaceuntiltheinstallationiscomplete.
Hearth & Home Technologies recommends the following:
Grateproperlyinstalled
Firescreeninstalledproperly.
(Builder/Gen.Contractor)(Installer)(Date)
Comments:Furtherdescriptionoftheissues,whoisresponsible(Installer/Builder/OtherTrades,etc.)andcorrectiveaction
needed:_________________________________________________________________________________________________
Manualbagandallofitscontentsareremovedfromthefireplaceandgiventotheparty
responsibleforuseandoperation.
________________________________________________________________________________________________________
________________________________________________________________________________________________________
Hearthextensioninstalledpermanualrequirements.
Finishing Section 6 (Pg. 27)

4Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
WARNING! Risk of Fire! Hearth & Home Technologies
disclaims any responsibility for, and the warranty and
agency listing will be voided by the following actions.
DO NOT:
• installoroperatedamagedreplace
• modifyreplace
• install other than as instructed by Hearth & Home
Technologies
• operate the fireplace without fully assembling all
components
• overre
• installunventedgaslogsets
• installanycomponentnotapprovedbyHearth&Home
Technologies
• installpartsorcomponentsnotListedorapproved
Improper installation, adjustment, alteration, service or
maintenance can cause injury or property damage. For
assistance or additional information, consult a qualied
installer, service agency or your dealer.
B. Non-Combustible Materials
• Materialswhich willnot igniteand burn,composed of
anycombinationofthefollowing:
- Steel - Iron
- Brick - Tile
- Concrete - Slate
- Glass - Plasters
• MaterialsreportedaspassingASTM E 136, Standard
Test Method for Behavior of Metals, in a Vertical Tube
Furnace at 750° C
C. Combustible Materials
• Materialsmadeoforsurfacedwithanyofthefollowing
materials:
- Wood - Compressedpaper
- Plantbers - Plastic
- Plywood/OSB - Sheetrock(drywall)
• Anymaterialthatcanigniteandburn;ameproofedor
not,plasteredorun-plastered
1 Product Specic & Important Safety Information
A. Appliance Certication
Thisreplacesystemhasbeentestedandlistedinac-
cordancewithUL127standardsbyUnderwritersLabo-
ratoriesInc.forinstallationandoperationintheUnited
States.
ThisreplacemaybeinstalledinsleepingroomsEX-
CEPTinmanufacturedhomes.Ifinstalledwithagaslog
set,provisionsfortheNationalFuelGasCodemustbe
met.
Thisreplacehasbeentestedandlistedforusewith
theoptionalcomponentsspeciedinthismanual.These
optionalcomponentsmaybepurchasedseparatelyand
installedatalaterdate.Theoutsideairkitsmustbe
installedatthetimeofreplaceinstallation.
HeatilatorisaregisteredtrademarkofHearth&Home
Technologies.

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Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
2 Getting Started
Additional lateral
support for chimney
above roof (or enclosed
in chase) if needed
Ceiling firestop
on floor of attic
Support straps
on rafter supports
chimney (not shown)
Termination cap
Chimney penetrates roof
preferably without affecting
roof rafters
Framing headed off
in ceiling joists
Enclosed space above
and around fireplace
Mantel and surround
Decorative facing
and trim
Hearth extension
Factory-built fireplace
Protective metal
hearth strip(s)
Combustible
framing/header
on top of
V-shaped
standoffs
(spacers)
Chimney system
Attic insulation shield must be used
here to keep insulation away
from chimney if attic is insulated
Attic Shield Collar
Storm Collar
Outside Air
(both sides)
Chase Top Flashing
(4) Roof Radiation Shields
A. Typical Fireplace System
Figure 2.1 Typical Fireplace System

6Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
A*
F
D
BC
1/2 in. (13 mm) all
configurations
1-1/2 in. min. air space
from fireplace to
combustible materials.
1/2 in. min. air space at
nailing flanges.
Note:
In an exterior chase
or projecting into a
garage
Across a
corner
As a
room
divider Along a wall
92 in.
(2337 mm)
G
B
E
48 in.
(1219 mm)
MINIMUM
24 in. (610 mm)
from fireplace opening to
any perpendicular wall
A
B
G
G
B
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Model # A B C D E F G
in. 85 7/8 61 7/8 103 1/4 51 5/8 25 1/4 73 28 1/2
mm 2181 1572 2623 1311 641 1854 724
BIR-50
*12 in. (305 mm) extra space
included for each outside air
connection. If outside air duct has
no bend, this dimension may be
reduced as long as minimum
clearances are met.
Figure 2.2 Fireplace Locations
NOTICE:
• Illustrationsandphotosreecttypicalinstallationsand
are FORDESIGNPURPOSESONLY.
• Illustrations/diagramsarenotdrawntoscale.
• Actualinstallation/appearancemayvaryduetoindividual
design preference.
• Hearth&HomeTechnologiesreservestherighttoalter
its products.
NOTICE: In addition to these framing dimensions, also
reference the following section:
• Framing and Clearances (Section 3).
NOTICE:
Aminimum1-1/2in.airclearanceatthebackand
sidesofthereplaceassemblymustbemain-
tained.
Chimneysectionsatanylevelrequirea2in.mini-
mum air space clearance between the framing
and chimney sections.
B. Design and Installation Considerations
NOTICE: Checkbuildingcodespriortoinstallation.
• InstallationMUSTcomplywithlocal,regional,stateand
national codes and regulations.
• Consultinsurancecarrier,localbuildinginspector,re
ofcialsorauthoritieshavingjurisdictionoverrestrictions,
installationinspectionandpermits.
• Before installing,determinethefollowing:
- Wherethereplaceistobeinstalled.
- Theventsystemcongurationtobeused.
- Gassupplypiping.
- Electricalwiring.
- Framingandnishingdetails.
- Whetheroptionalaccessories-devicessuchasa
fan,wallswitchorremotecontrol-aredesired
1. Selecting Fireplace Locations
Thisreplacemaybeusedasaroomdivider,installed
alongawall,acrossacornerorusedinanexteriorchase.
SeeFigure2.2.
Locatingthereplaceinabasementshouldbeavoided.
Locatingnearfrequentlyopeneddoors,centralheat
outletsorreturns,orotherlocationsofconsiderableair
movementcanaffecttheperformance.
Considerationshouldbegiventothesefactorsbefore
deciding on a location.

7
Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
2. Locating Fireplace & Chimney
Locationofthereplaceandchimneywillaffectperfor-
mance.
• Installwithinthewarmairspaceenclosedbythebuilding
envelope.Thishelpstoproducemoredraft,especially
duringlightinganddie-downofthere.
• Installingthereplaceinabasementisnotrecommended.
• Penetratethehighestpartoftheroof.Thisminimizes
the effects of wind loading.
• Locate termination cap away from trees, adjacent
structures,unevenrooflinesandotherobstructions.
• Minimizetheuseofchimneyoffsets.
• Considerthereplacelocationrelativetooorandceiling
and attic joists.
• Takeintoconsiderationtheterminationrequirementsin
Section4.
Marginal Location:
• Below peak
Location NOT recommended:
• Not the highest point of the roof
• Wind loading possible
Multi-level Roofs
Windward
Leeward
Recommended Location:
• Above peak
Recommended:
• Insulated exterior chase
in cooler climates
Recommended Location:
• Above peak
• Inside heated space
Location NOT recommended:
• Too close to tree
• Below adjacent structure
• Lower roof line
• Avoid outside wall
Marginal Location:
• Wind loading possible
Figure 2.3 Recommended Chimney Locations
• Installtheoutsideairkitwiththeintakefacingprevailing
winds during the heating season.
• Ensure adequate outdoor air for all combustion
appliancesandexhaustequipment.
• Ensurefurnaceandairconditioningreturnventsarenot
locatedintheimmediatevicinityofthereplace.
• Avoidinstallingthereplaceneardoors,walkwaysor
smallisolatedspaces.
• Recessedlightingshouldbea“sealedcan”design.
• Attichatchesweatherstrippedorsealed.
• Atticmountedductworkandairhandlerjointsandseams
taped or sealed.

8Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
C. Tools and Supplies Needed
Beforebeginningtheinstallationbesurethefollowing
toolsandbuildingsuppliesareavailable:
Reciprocatingsaw Framingmaterial
Pliers Non-combustiblesealant
Hammer Gloves
Phillipsscrewdriver Framingsquare
Flatbladescrewdriver Electricdrillandbits
Plumbline Safetyglasses
Level Tapemeasure
1/2-3/4in.length,#6or#8self-drillingscrews
Misc.screwsandnails
D. Inspect Fireplace and Components
WARNING! Risk of Fire and/or Explosion! Damaged
parts could impair safe operation. DO NOT install dam-
aged,incompleteorsubstitutecomponents.Keepre-
place dry.
• Removereplaceandcomponentsfrompackagingand
inspectfordamage.
• Vent system components and doors are shipped in
separatepackages.
• Reporttoyourdealeranypartsdamagedinshipment.
• Read all the instructions before starting the
installation. Follow these instructions carefully
during the installation to ensure maximum safety
and benet.
E. Fireplace System Requirements
TheHeatilatorreplacesystemrequirementsconsistof
the following:
• Fireplace
- Molded brick panels (hearth panel Included with
replace,sideandbackpanelssoldseparately)
- Firescreen(includedwithreplace)
- HearthExtension(soldseparately)
- Grate(includedwithreplace)
• OutsideAirSystem
- AirInletHood(includedwithreplace)
- Flex(required,soldseparately)
• ChimneySystem
- AtticInsulationShield(soldseparately)
- Chimneyterminationcap(soldseparately)
• Non-combustiblenishmaterial

9
Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
3 Framing and Clearances
A. Fireplace Dimensions
16 1/8 in.
408 mm
Gas Line
Knockout
11 1/8 in.
282 mm
6 7/8 in.
175 mm
5 in.
129 mm
50 in.
1270 mm
60 7/8 in.
1546 mm
3 3/4 in.
97 mm
38 in.
965 mm
54 in.
1372 mm
74 1/8 in.
1883 mm
70 3/4 in.
1797 mm
16 1/8 in.
408 mm
11 1/8 in.
282 mm
6 7/8 in.
175 mm
5 in.
129 mm
45 1/8 in.
1146 mm
11 in.
281 mm
27 1/2 in.
699 mm
74° TYP.
Gas Line
Knockout
22 1/2 in.
572 mm
61 7/8 in.
1572 mm
5 1/2 in.
140 mm
Figure 3.1 Fireplace Dimensions

10 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
1/2 in. air space
established by
spacers
Chase Top
Flashing
Roof
Radiation Shield
1/2 in.
Air Space
Spacers furnished with
complete Chase Top Flashing
(May be field-fabricated)
1/2
Storm collar must
be installed 1 in.
off chase top
CHASE TOP CLEARANCES
1 1/2” Ventilation Opening
around Chimney Pipe
(insulation)
0 in. to level
of standoffs
Attic
Insulation Shield
(ceiling)
(roof)
(attic)
(ceiling)
Attic Shield Collar
Ceiling Firestop
Storm Collar
Chase Top Flashing
1-1/2 in. (38 mm)
to back & sides
of appliance
(except at nailing
flanges where it is
1/2 in. [13 mm])
Must have 2 in. (51 mm)
minimum clearance
to any combustible materials
including header
0 in.
to floor
2 in. (51 mm) min.
Shaded areas
represent
2 in. (51 mm) min.
air space clearance
required around pipe
Combustible Object
48 in.
1219 mm
1 in.
B. Clearances
WARNING! Risk of Fire!
You must comply with all minimum air space clearances
tocombustiblesasspeciedinFigure3.2.DO NOTpack
required air spaces with insulation or other materials.
Framing or nishing material used on the front of, or in
frontof,thereplacecloserthantheminimumslistedmust
beconstructedentirelyofnon-combustiblematerials(i.e.,
steel studs, concrete board, etc.). Failure to comply may
causere.
Figure 3.2 Clearances to Combustible Materials
Minimum Clearances to Combustibles
WITHIN ENCLOSURE AREA
Fireplacetobackwall 1-1/2in.(38mm)
Fireplacetosidewall 1-1/2in.(38mm)
Top standoffs to header 0in.(0mm)
Door opening to sidewall 24in.(610mm)
MANTEL
Mantelminimumheight 63-3/4in.(1619mm)
Maximummanteldepth 12in.(305mm)

11
Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
C. Construct the Chase
Achaseisaverticalboxlikestructurebuilttoenclosethe
replaceand/oritsventsystem.Verticalchimneysthat
runontheoutsideofabuildingmustbeinstalledinsidea
chase.
Incoldclimates,Hearth&HomeTechnologiesrecom-
mendsthatthechasebewellinsulatedusingbatttype
insulationbetweenthejoists.
Constructionofthechasemayvarywiththetypeofbuild-
ing.Theseinstructionsarenotsubstitutesfortherequire-
mentsoflocalbuildingcodes.LocalbuildingcodesMUST
bechecked.
Chasesshouldbeconstructedinthemannerofalloutside
wallsofthehometopreventcoldairdraftingproblems.
Thechaseshouldnotbreaktheoutsidebuildingenvelope
inanymanner.Allouterwallsneedtobeinsulated.
Buildingcodesrequirefalseceilingandceilingrestops/
atticshieldsateachoorofthechaseorevery10ft(3048
mm)ofclearspacetocontrolspreadofre.
Walls,ceiling,baseplateandcantileveroorattherst
levelofthechaseshouldbeinsulated(seeFigure3.3.)
Vaporandairinltrationbarriersshouldbeinstalledinthe
chaseasperregionalcodesfortherestofthehome.Ad-
ditionally,Hearth&HomeTechnologiesrecommendsthat
theinsidesurfacesbedrywalledandtaped(ortheuseof
anequivalentmethod)formaximumairtightness.
Holesandotheropeningsshouldbecaulkedwithhigh
temperaturecaulkorstuffedwithunfacedberglass
insulation.
Ceiling
Firestop
Metal Chase Top
Round Termination Cap
False Ceiling
Insulation in the
outside walls
of the chase
Attic
Insulation
Shield
Chimney
Ceiling
Firestop
Tabs
False Ceiling
False Ceiling
Insulation
Insulation
Storm Collar
Figure 3.3 Chase Assembly
1 2 3
All outside walls should be insulated.
Figure 3.4 Chase Constructions
1. Fireplaceandchimneyenclosedinanexteriorchase.
 2. Chimneyoffsetthroughexteriorwallandenclosedinchase.
 3. Chaseconstructedonroof.
• Thechaseisconstructedusingframingmaterialsmuch
thesameasthewallsinyourhome.Avarietyofsiding
materials may be used including brick, stone, veneer
brick,orstandardsidingmaterials.
• In constructing the chase, several factors must be
considered:
- Maintain a 2 in. (51 mm) air space around the
chimney.
- The chase top must be constructed of non-
combustiblematerial.
- Incoldclimates,arestopspacerandatticinsulation
shieldshouldbeinstalledinaninsulatedfalseceiling
at the 8 ft. (2438 mm) level above the replace
assembly.Thisreducesheatlossthroughthechase.
- Incold climates, the walls of the chase shouldbe
insulatedtothelevelofthefalseceilingasshownin
Figure3.3.Thiswillhelpreduceheatlossfromthe
homearoundthereplace.
ThreeexamplesofchaseapplicationsareshowninFig-
ure3.4.
WARNING! You must install false ceilings and ceil-


WARNING! Risk of Fire! DO NOT sealareabetweenre
stop opening and chimney pipe except where they enter
the attic or leave the warm air envelope of the home (use
600° F sealant).
WARNING! Risk of Fire! Youmust maintain a minimum
2in.(51mm)airspaceclearancetoinsulationandother
materials surrounding the chimney system.
• Insulationandothermaterialsmustbermlysecuredto
prevent accidental contact with chimney system.
• Thechasemustbeproperlyblockedtopreventblown
insulation or other combustibles from entering and
makingcontactwithreplaceorchimney.
• Failuretopreventcontactbetween insulationorother
materials and chimney system may cause overheating
andre.

12 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
WARNING! Risk of Fire! Youmustcomplywithall
minimum air space clearances to combustibles. DO NOT
packrequiredairspaceswithinsulationorothermateri-
als.
WARNING! Risk of Fire! Comply with all minimum clear-
ancesspecied.
• A minimum 1-1/2 in. (38 mm) air clearance must be
maintained at the back and sides of the fireplace
assembly.
• Chimneysectionsatanylevelrequirea2in.(51mm)
minimum air space clearance between the framing and
chimney section.
CAUTION! RiskofCuts/Abrasions.Wearprotectivegloves
and safety glasses during installation. Sheet metal edges
are sharp.
B
C
A
2 in. (51 mm)
min. air space
clearance
from chimney.
Note: Framing must be extended straight up,
all the way to the ceiling.
Header MUST NOT be notched!
D
D = extra space needed for outside air connection.
If outside air duct has no bend, this dimension may be
reduced as long as minimum clearances are met.
D
E
A B * C ** D E min.
in. 61 7/8 28 1/2 74 1/2 12 21
mm 1572 724 1892 305 533
Model #
** Adjust header height for raised floor under fireplace.
RUTH50-B
* If interior of chase will be drywalled, add the thickness to this measurement.
The header cannot be positioned until
after the fireplace assembly is in place.
1/2 in.
(13 mm)
Fireplace must be set out
1/2 in. (13 mm) in front of
the face of the framing
material.
Figure 3.5 Framing the Fireplace
D. Frame the Fireplace
NOTICE: Hearth extension design must be determined
beforeinstallationofreplace.
Ifthereplaceisplacedontheoor,themaximumheight
ofanishedraisedhearthis3-3/4”,ifyouwantahigher
raisedhearththereplacemustbeplacedonaplatform.
Figure3.5showsatypicalframing(using2x4lumber)of
thereplace,assumingcombustiblematerialsareused.
Allrequiredclearancestocombustiblesaroundthere-
placemustbeadheredto.SeeFigure3.2.Anyframing
acrossthetopofthereplacemustbeabovethelevelof
thetopstandoffs.(Norecessabovestandoffs.)
The nishedcavitydepthmustbenolessthan28-1/2in.
(673mm)fromthenishedbackwalltotheoutsideoffront
wallframing.Framingmustextendstraightupalltheway
to the ceiling.

13
Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
E. Secure and Level the Fireplace
Thisreplacemaybeplacedoneitheracombustibleor
noncombustiblecontinuousatsurface.Slidethereplace
intoposition.Besuretoprovidetheminimum1-1/2in.air
clearanceatthesidesandbackofthereplace.
Thereplaceshouldbepositionedsothefaceofthenon-
combustiblematerialonthereplacewillbeushwiththe
faceofthedrywallonthewalls.
Levelthereplaceandshimasnecessary.
1 in. (25 mm)
overlap
Protective metal strips are placed 2 in. (51 mm) under
the front of the fireplace and must extend beyond the
front and sides of fireplace opening by 2 in. (51 mm).
Raised Platform
Floor
2 in.
(51 mm)
1 in. (25 mm) min.
overlap
2 in.
(51 mm)
Top piece must overlap
bottom piece
Figure 3.7 Protect the Front of an Elevated Platform
F. Protective Metal Hearth Strips
Figure 3.6 Position the Protective Metal Hearth Strips
• Locatethetwoprotectivemetalhearthstripsmeasuring
approximately26in.x4in.(660mmx102mm)included
withthisreplace.
• Slideeachmetalstrip2in.(51mm)underfrontedgeof
replace.
• Overlapstripsinthemiddleofreplaceopeningby1in.
(25mm)minimum.
• Metal strips must extend beyond the front and sides
of the replace opening by at least 2 in. (51 mm),
Figure3.6).
• Protectthefrontofaplatformelevatedabovethehearth
extensionwithmetalstrips(notincludedwithreplace)
per Figure 3.7. See Section 6 for hearth extension
instructions.
WARNING! Risk of Fire! Protective metal hearth
strips MUST be installed on combustible surfaces. DO
NOT cover metal strips with combustible materials.
Sparksorembersmayigniteooring.
WARNING! Hightemperatures,sparks,
embers or other burning material falling from the
replacemayigniteooringorconcealedcombustible
surfaces.
• ProtectivemetalhearthstripsMUSTbeinstalled.
• Hearth extensions MUST be installed exactly as
specied.
WARNING! Risk of Fire! Prevent contact with sagging,
loose insulation.
• DO NOT install against vapor barriers or exposed
insulation.
• Secureinsulationandvaporbarriers.
• Provideminimumairspaceclearancesatthesidesand
backofthereplaceassembly.

14 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
3 ft min. from
top of uppermost
chimney section
to air inlet.
G. Outside Air Kit
Outsideairkitsmustbeusedforcombustionandtopro-
videcoolingairtopreventoverheating.Hearth&Home
Technologiesrecommendsyouutilizetheshortestduct
runtooptimizetheperformanceoftheoutsideairkit.The
outsideairinlethoodsshouldbepositionedinamanner
thatwillnotallowsnow,leaves,etc.toblocktheinlet.In
someinstallationstheairductmayneedtoberunverti-
cally.Insuchaninstallation,a3ft(914mm)heightdiffer-
encemustbemaintainedfromthetopoftheuppermost
chimneysectiontotheoutsidecombustionairinlethood.
RefertoFigures3.8and3.9whenplacingtheoutsideair
inlet hood.
WARNING! Risk of Fire! Theoutsideairkitsareinstalled
onthebothsidesofthereplacetopreventoverheating
andre.
• Cuta6in.(152mm)holeinoutsidewalltoaccommodate
air piping.
• Use6in.(152mm)ex(notsupplied)todirectlyconnect
outsideairtoreplaceintake.Insulatethepipetoprevent
frost condensation.
• Usethesuppliedoutsideairinlethoods.
• Seal between the wall and the pipe with silicone to
preventmoisturepenetrationandairleaks.
• Sealbetweentheoutsideairinlethoodsandthehouse
withsiliconetopreventairinltration.
CAUTION! Risk of Cuts/Abrasions. Wearprotective
gloves and safety glasses during installation. Sheet metal
edges are sharp.
CAUTION! DO NOT draw
outsidecombustionairfromwall,oororceilingcavity,or
enclosed spaces such as an attic or garage.
• DO NOT place outside air inlet hood close to exhaust
vents or chimneys. Fumes or odor could be drawn into
theroomthroughthereplace.
• Locateoutsideairinlethoodtopreventblockagefrom
leaves,snow/ice,orotherdebris.Blockagescouldcause
combustion air starvation.
Figure 3.8 Outside Air Inlet Locations
Outlet placed
higher than 3 ft
below the
termination cap
Attic space
Garage or
combustible
liquids storage
Outlet blocked by
snow, leaves, etc.
Clear area
outside
house or in
ventilated
crawl space
YES
NO
NO
NO
NO
Factory-built
fireplace
• Use UL181 Class 0 or Class 1 rigid or flexible ducting.
• Install with short run or mainly straight duct, except small
dip for cold air trap which will help prevent flow of cold air.
• Secure flex duct with screws or wire ties.
Figure 3.9 Outside Air Installation
Outside air in-
stalled on both
sides (right side
not shown)
NOTICE: The fireplace provides some outside air for
combustion. Other methods may be necessary if more air
is required.

15
Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
4 Chimney and Termination Installation
NOTICE: Chimney performance may vary.
• Trees,buildings,rooflinesandwindconditionsaffect
performance.
• Chimney height may need adjustment if smoking or
overdraft occurs.
A. Chimney Requirements
Measureverticaldistancesfromthebaseofthereplace.
WARNING! Risk of Fire! Youmustmaintain2in.(51mm)
air space clearance to insulation and other combustible
materials around the chimney system. Failure to do so
maycauseoverheatingandre.
Feet Meters
• Minimumoverallstraightheight 18 5.49
• Minimumheightwithoffset/return 18.5 5.64
• Maximumheight 50 15.24
• Maximumchimneylengthbetweenanoffset
and return
20 6.10
• Maximumdistancebetweenchimney
stabilizers
25 7.62
• Maximumunsupportedchimneylength
betweentheoffsetandreturn
6 1.83
• Maximumunsupportedchimneyheightabove
thereplace
25 7.62
• Maximumunsupportedchimneyaboveroof 6 1.83
• Minimumheightwithdoubleoffset/return 22.5 6.86
Height of Chimney Components in. mm
Stabilizer
14DCA-ST
Firestop
14DCA-FS
Elbows
14DCA-E15-15°Elbow
14DCA-E30-30°Elbow
Miscellaneous
14DCA-ES-ElbowStrap
14DCA-SS-SupplementarySupport
14DCA-IS-InsulationShield
14DCA-RRS-RoofRadiationShield
14DCA-CTF-ChaseTopFlashing
14DCA-CTC-ChaseTopCollar
14DCA-VC-ChimneyCap
14DCA-SC-StormCollar
14DCA-WS-WallStrap
Chimney Sections*
14DCA-12 101/2 267
14DCA-18 161/2 419
14DCA-36 341/2 876
14DCA-48 461/2 1181
*Dimensionsreecteffectiveheight.
Table 4.1

16 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
(4) Roof
Radiation
Shields
Chimney Section
Chimney Section
Attic Insulation
Shield & Collar
Square Frame
Firestop
Square Frame
Firestop
Chimney Section
74 1/8 in.
(1883 mm)
Effective
Height
Termination
Cap
Storm
Collar
Chase Top
Flashing
Figure 4.1
Determinethechimneycomponentsneededtocomplete
yourparticularinstallation:
• Measure the total vertical height of the fireplace
installationfromthebaseofthereplaceassemblyto
theapproximatelocationofthebottomofthetermination
cap.
• Subtracttheeffectiveheightofthereplaceassembly
(seeFigure4.1)fromthetotalverticalheighttodetermine
theoverallheightofthechimneyinstallation.
• CreateaschematicforyourapplicationsimilartoFigure
4.1showingcomponentsrequired(referringtoTable4.1).
• Installaceilingrestopwheneverthechimneypenetrates
aoor/ceiling.
NOTICE: Amaximumoftwooffsetandreturnmaybe
used.
CAUTION!      DO
NOT connectthisreplacetoachimneyueservicing
another appliance. Do NOT connect to any air distribu-
tion duct or system. These actions could cause over-
heating/reinthechimneyue,orreleaseofexhaust
fumes into the living areas.

17
Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
A MAJOR CAUSE OF VENT RELATED FIRES IS FAIL-
URE TO MAINTAIN REQUIRED CLEARANCES (AIR
SPACES) TO COMBUSTIBLE MATERIALS. IT IS OF
THE UTMOST IMPORTANCE THAT DURACHIMNEY II
BE INSTALLED ONLY IN ACCORDANCE WITH THESE
INSTRUCTIONS.
B. Clearances
Alwaysallowatleasta2-inchclearancebetweenDura-
ChimneyIIPipeandanycombustiblematerials.
• Neverllanyrequiredclearancespacewithinsulation
oranyothermaterials.
• Combustible materials include lumber, plywood,
sheetrock,plasterandlath,furniture,curtains,electrical
wiring,andbuildinginsulation.
C. Installation Notes
ProperplanningforyourDuraChimneyIIinstallationwill
resultingreatersafety,efciency,andconvenience,as
wellassavingtimeandmoney.Youmustuseonlyautho-
rizedDuraChimneyIIpartstomaintainalistedchimney
system.Donotmixpartsortrytomatchwithotherprod-
uctsoruseimprovisedsolutions.
• Donotinstalldamagedormodiedparts.
• Practice good workmanship. Sloppy work could
jeopardizeyourchimney’ssafety.
• Keep electrical wiring and building insulation away
from all chimneys.
• When deciding the location of your chimney, try to
avoidmodicationstoroofbeamsandotherstructural
componentsofthebuilding.
Ifyouhaveanyquestions,contacteitheryourdealeror
SimpsonDura-Ventdirectly.
D. Frame Openings
• Fromtheceiling,dropaplumbbobtothecenterofthe
replace’sueoutletandmarkthiscenterpointonthe
ceiling.
• Markappropriatecuttinglinesaroundthecenterpoint.
Cutasquareholeintheceiling.Framealevel,square,
21in.x21in. (533 mm x 533 mm) opening centered
overtheholethatyouhavecut.
• Frameopeningsateachoorlevelabovethereplace
(Figure4.1).Theseopeningsaretoholdtherestopand
attic insulation shield.
• Locateeachopeningbydroppingaplumbbobtothe
fourcornersoftheopeningbelow.
• Maintain the minimum 2-inch clearance/air space.
Maintaintheminimumclearancesanddimensionsas
speciedinTable4.1.
E. Cut Roof Opening
Determineandcutanopeningintheroofdirectlyabove
theopeningbelow,andatleast4-incheslargerthanthe
chimney’soutsidediametertoprovideatleasta2-inch
clearanceallaroundthechimney.
• Thechimneymustbecenteredwithinthisopeningand
maintaintheminimum2-inchclearancetocombustibles.
F. Install Firestop
Arestopisrequiredoneachoorpenetrationinmultisto-
ryinstallation.BuildingCodesrequirearestopatevery
oor/ceilinglevel,includingwherethechimneypenetrates
intotheattic.Figure4.1showsatypical2-storyinstalla-
tion with an attic.
Note:arestopisnotinstalledwherethechimneypen-
etrates through the roof.
• Therestopisinstalledontheundersideoftheceiling/
oorframing(Figure4.2).
• Useaminimumofone8pennynailorone1-1/4”wood
screw per corner.
Framing
Figure 4.2

18 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
G. Assemble Chimney Sections
• Attach the rst chimney section or offset onto
thetopofthereplace(Figure4.3).Sheetmetal
screwsarerequiredtoconnectchimneysection
to the replace starter collar. Continue to add
additionalsectionsofchimneyasneeded.
• Use a wall strap every eight feet of chimney
height.
• For each additional chimney section use four
ofthesheetmetalscrews provided tomakea
secureconnectionbetweenthechimneysections
(Figure4.4).Donotpenetratetheinnerlinerof
thechimney.
Figure 4.3
Figure 4.4
H. Using Offsets/Returns
• Useanoffset/returntobypassoverheadobstructions.
• Anoffsetandreturncanbeusedasasingleentityorseparated
bychimneysection(s).
WARNING! Risk of Fire! DO NOT useoffset/returnsgreaterthan
30 ft. Chimney draft will be restricted and could cause overheating
andre.
• Measure the shift required to avoid the overhead obstruction
(Offset,Figure4.5).
• FindtheappropriateoffsetdimensionlistedinTable4.2.
• Therise (seeFigure 4.5) coinciding with the offsetdimension
measurement in Table 4.2 represents the required vertical
clearanceneededtocompletetheoffset/return.
Table 8.2
Elbow
Angle
from
Vertical
Chimney
Length
Between
Elbows
Offset
Inches
Rise
Inches
Offset
Millimeters
Rise
Millimeters
15° 0 25/8 215/8 67 549
15° 12in./305mm 51/2 321/4 140 819
15° 18in./457mm 71/8 38 181 965
15° 36in./914mm 113/4 553/8 298 1407
15° 48in./1219mm 147/8 67 378 1702
30° 0 61/4 241/2 159 622
30° 12in./305mm 113/4 34 298 864
30° 18in./457mm 143/4 391/4 375 997
30° 36in./914mm 233/4 547/8 603 1394
30° 48in./1219mm 293/4 651/4 756 1657
RISE
OFFSET
Figure 4.5

19
Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
Elbow Strap
30° or 15°
Elbow
Figure 4.6
Elbow Strap
1 per
Section
Figure 4.7
I. Offset Elbow Installation
A30°Elbow(measuredfromthevertical)isthelargest
thatcanbeusedinanoffset.A30°Elbowmaynotbe
combinedwithanotherElbowtomakeasteeperoffset
(e.g.two30°Elbowsarenotallowedtobeputtogetherto
forma60°elbow.).AvoidElbowsifpossible.Atotallyver-
ticalchimneyismoreefcient.WhenElbowsareneces-
sarytoavoidobstructionssuchasrafters,ridgepoles,or
joists,youareonlyallowedtouse2pairofElbowsinany
onechimneysystem.Horizontalrunsofchimneyviolate
buildingcodeandarenotallowed.
• Attachelbows
 Attach elbow to chimney section or other elbow by
matingthemaleandfemaleendswitheachotherand
using four sheet metal screws provided.Attach one
elbowtothechimneysectionbelow,andalignitforthe
offset.Determinetherequiredoffsetlengthandattach
anappropriatelength(orlengths)ofchimneysection(s)
abovetheelbow.Attach thesecondelbowabovethe
chimneysectiontocompletetheoffset(Figure4.6).
• Secureoffset
 Use an elbow strap to secure the offset. Secure the
elbowstrap’sbandtochimneyaroundtheupperportion
ofthetopelbow,thentightenthenutandboltuntilthe
clampisrm.Wraptheelbowstrapendoveranadjacent
joistorrafterandsecureitwithatleasttwo8-pennynails
ortwo#8,1-1/2”screws.Addadditionalelbowstraps
foreachsectionofchimneyintheoffset(Figure4.7).
Everychimneysectionintheoffsetmustbesupported.
Donotaddmorechimneysectionsuntiltheelbowsand
offsetaresupported.Besurethatthechimneyremains
vertical.
Chase
Frame
Stabilizer
Plumbers
Tape
Install supplementary
support if height exceeds
50 ft or if required by
fireplace manufacturer
Each supplementary
support holds up to
25 ft. of chimney
Maintain 2 in. clearance
from chimney to framing
Figure 4.8
Figure 4.9
J. Supplementary Support & Stabilizer
Installasupplementarysupportiftotalchimneyheight
isgreaterthan50-feet,orifthereplacemanufacturer
requiresit.Ifadditionalsupportisneeded,installoneor
moresupplementarysupportswhichcaneachsupport25-
feetofchimney(Fig.4.8).
• Clampthesupplementarysupportbandaroundthepipe
usingthenutandboltprovided,andanchorthesupport
tonearbybuildingframing.
• Alwaysmaintainthe2”clearancetocombustiblesfrom
the chimney pipe.A stabilizer is available and may
be required by some replace manufacturers to keep
the chimney vertical and help maintain clearances to
combustibleswithinachase.
• Clampthestabilizertothepipeusingthenutandbolt
provided, and secure legs to nearby framing using
plumber’stapeorguy-wires(Fig.4.9).
Note: The stabilizer does not support the weight of the
chimney,itis onlyused tokeepchimneycenteredwithin
a chase.

20 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev G • 06/29/15
K. Install Attic Insulation Shield
Theatticinsulationshieldmustbeinstalledwherethe
chimneypassesintoanattic.Itspurposeistopreventde-
brisandinsulationfromgettingtooclosetothechimney.
Inatticareaswherethisshieldcannott,orisnotused
youmustenclosetheatticportionofthechimneyina
framedenclosure.Ifthechimneyisfullyenclosedthrough
theattic,anatticinsulationshieldisnotrequired.Install
the attic insulation shield as follows:
• Removeanyinsulationfromatticooraroundtheframed
opening.
• Assemblechimneysectionsuntilatleast18inchesof
chimneyextendsabovetherestop.
• Sliptheatticinsulationshieldoverthechimneyuntilthe
basesitssquarelyontheframedopening(Figure4.10).
• Securetheatticinsulationshieldtothetopoftheframed
opening using at least two 8-penny nails or two #8,
1-1/2in.woodscrewsperside(Figure4.11).
• Wrapthecollaroftheatticinsulationshieldaroundthe
chimney and fasten it loosely. Slide the collar down
tomeettheatticinsulationshield.Tightentheboltsto
securethecollarinplace(Figure4.11).
Attic
Insulation
Shield
Firestop
Attic
Figure 4.10
Attic
Attic Shield
Collar
Firestop
Figure 4.11
L. Install Roof Radiation Shields
Roofradiationshieldsmustbeusedtoprovideprotection
forrooforchaseframingmembers.
Note: Roof radiation shields do not allow for a reduced
clearancetocombustibles.
Clearancetocombustiblesmustbeaminimumof2”
awayfromthechimneypipe.
• Installroofradiationshieldsateitherthetopofthechase
orwherethechimneypenetratestheroof,whicheveris
the top of the installation.
• Roofradiationshieldsarebuiltwitha1/2”airgapstandoff
fromthejoistface(Figure4.12).Thecornersoftheroof
radiationshieldsoverlapeachothertoensureproper
position.
• Securetheroofradiationshieldstothetopoftheframing
membersusingscrewsornailsinthecorners.
• Ifframingmembersarefurtherawayfromthechimney
than2in.,centertheroofradiationshieldtothechimney
ontheframingmemberandsecureinplacewithscrews
or nails.
(4) Roof
Radiation
Shields
Chase
Enclosure
Figure 4.12
M. Attach Flashing
Forchaseenclosures,usethechasetopashing.The
chasetopashingallowsfora1-1/2in.clearancemain-
tainedfromthechimney(Figure4.14)andprovides
requiredventilationair.
• Chase top ashings (includes chase top collars and
spacingclips)areavailablefromyourHHTdealer.
• Additionalnon-combustiblestructuralsupportscanbe
eld-fabricatedtohelpsupportthechasetopashing
ifneeded,providedtheairventilationrequirementsare
maintained.SeeFigure4.15.
• Ifthechasetopashing(40in.x40in.)doesnotensure
theminimum1/2in.spacingandperimeterventilation
requirementsasshowninFigure4.13.,useachasetop
collarandeld-constructtheashingasneededforthe
chasedimensions.SkiptoField-Constructed Chase
Top Flashing.