Enviro CFR User manual

December, 2005 • Part No. PX-00-0005

Features and Benefits............................................................................................................................2
Construction Features ...........................................................................................................................4
Application and Selection .....................................................................................................................6
Primary Airflow Calibration ...................................................................................................................9
Dimensional Data.................................................................................................................................10
General Selection Data (Standard PSC Motor) .....................................................................................12
Sound Power Data ...............................................................................................................................14
Fan Performance Data (Standard PSC Motor) ......................................................................................16
ECM™ Fan Motor Option .....................................................................................................................18
General Selection Data ...................................................................................................................19
Fan Performance Data ....................................................................................................................20
ARI Ratings...........................................................................................................................................21
Electric Heat .........................................................................................................................................22
Hot Water Coil Data.............................................................................................................................23
Guide Specifications.............................................................................................................................30
Standard and Optional Features ..........................................................................................................32
CFR • TABLE OF CONTENTS
2CFR Catalog • ©December, 2005 Environmental Technologies, Inc.
©December, 2005 Environmental Technologies, Inc.
6750 Bryan Dairy Rd. • Largo, FL 33777
Stock ID: CAT-CFR • Part No. PX-00-0005
Model CFR is Designed for
QUIET
, EFFICIENT COMFORT
Model CFR fan terminals are specif-
ically designed for quiet operation.
They also offer improved space com-
fort and flexibility for a wide variety
of HVAC systems. This is critical in
today’s buildings, where
occupants are placing more empha-
sis on indoor acoustics.
Occupant-Sensitive Design
Due to heightened interest in
Indoor Air Quality, many HVAC
system designers are focusing on
the effects of particulate contam-
ination within a building’s occupied
space. Often, HVAC system noise
is overlooked as a source of occu-
pied space contamination. The CFR
terminal is specifically designed
to eliminate obtrusive fan noise from
reaching the occupants, while pro-
viding constant air motion in the
space.
Occupants will benefit from the CFR
design that minimizes low fre-
quency (125Hz-250Hz) sound levels
that typically dominate the space
sound level. The CFR also minimizes
the fluctuation in sound levels that
occur during VAV damper modu-
lation.
For the Building Designer:
FLEXIBILITY
Selection and Layout. The CFR pro-
vides flexibility in system design.
Reduced noise at the fan terminal
allows the system designer to place
properly sized units directly above
occupied spaces. It is not neces-
sary to use the crowded space
above a hall or corridor to locate
the equipment. This will reduce
lengthy and expensive discharge
duct runs. The standard shallow cas-
ing height (14" up to 1000 CFM)
minimizes conflict with other sys-
tems competing for ceiling space.
The FlowStarTM sensor ensures accu-
rate control, even when space
constraints do not permit long
straight inlet duct runs to the ter-
minal.
Sizes. Model CFR terminals are
available in nine fan sizes to han-
dle airflow capacities between 100
and 4800 CFM. Most fan sizes are
available with three primary air valve
sizes to optimize the unit fan and
primary air valve combinations
required by current industry needs.
An ENVIRO-TEC® Windows®based
Computer Selection Program is
available on CD-ROM to facilitate
the selection process. Contact
your ENVIRO-TEC®representative to
obtain a copy of this powerful
and time-saving program.
FEATURES AND BENEFITS
GENERAL NOTES
• All data herein is subject to change without notice. Some drawings are not shown in this catalog.
Refer to www.enviro-tec.com for current catalog and submittal drawings.
• Drawings not for installation purposes; refer to IOM manual at www.enviro-tec.com.
• Construction drawings and performance data contained herein should not be used for submittal purposes.
• ETL Listing Number 476203.

FEATURES AND BENEFITS • CFR
©May, 2006 Environmental Technologies, Inc. • CFR Catalog 3
For the Contractor:
CONVENIENCE
Quality. All CFR terminals are thor-
oughly inspected during each step
of the manufacturing process,
including a comprehensive “pre-ship”
inspection, to assure the highest qual-
ity product available. Each unit is
also “run tested” before leaving the
factory to ensure trouble free field
“start-up.”
Quick Installation. A standard
single point electrical main power
connection is provided. Electron-
ic controls and electrical
components are located on the
same side of the casing for quick
access, adjustment, and trou-
bleshooting. Installation time is
minimized with the availability of
factory calibrated ENVIRO-TEC®
controls.
Finite fan speed adjustment is
accomplished with an electronic SCR
controller. The SCR fan speed con-
troller is manufactured by
ENVIRO-TEC®and is compatible
with the fan motor. This minimizes
electronic interference and har-
monic distortion that occurs from
non-compatible motor and SCR
components. Increased motor life
and efficiency result from the
compatible design.
CFR terminals utilize three tap
motors that accommodate a broad
range of flow and static pressure
field conditions while dramatical-
ly increasing efficiency.
The FlowStarTM sensor ensures accu-
rate airflow measurement, regardless
of the field installation conditions.
A calibration label and wiring dia-
gram is located on the terminal for
quick reference during start-up.
The terminal is constructed to
allow installation with standard
metal hanging straps. Optional
hanger brackets for use with all-
thread support rods or wire hangers
are also available.
For the Owner:
VALUE AND SECURITY
Quality. All metal components are
fabricated from galvanized steel.
Unlike most manufacturers’ ter-
minals, the steel used in the CFR
is capable of withstanding a 125
hour salt spray test without show-
ing any evidence of red rust.
Energy Efficiency. In addition to
quiet and accurate temperature con-
trol, the building owner will benefit
from lower operating costs. The
highly amplified velocity pressure
signal from the FlowStarTM inlet sen-
sor allows precise airflow control
at low air velocities.
The FlowStarTM sensor’s airfoil shape
provides minimal pressure drop
across the terminal. This allows the
central fan to run at a lower pres-
sure and with less brake horsepower.
Energy efficient three tap, three
winding, permanent split capaci-
tor fan motors are manufactured
to ensure efficient, quiet, reliable,
and low maintenance operation.
Three tap motors provide superi-
or energy efficiency over single
speed motors by delivering three
separate horsepower outputs. For
example, a nominal 1/2 HP motor
delivers 1/3 HP on medium tap and
1/4 HP on low tap. This allows
the motor to operate at a higher
efficiency when at a reduced fan
capacity.
Fan terminals that utilize a single
speed motor must rely solely on an
SCR controller to obtain the reduc-
tion in fan capacity. At minimum
turndown, they suffer from exces-
sive power consumption and high
motor winding temperatures, sig-
nificantly reducing the motor life.
As an option, Model CFR is avail-
able with an ECM™ fan motor,
providing efficiency ratings between
70% and 80% for most applications.
Agency Certification. Model CFR
terminals, including those with
electric heat, are listed with ETL as
an assembly, and bear the ETL
label.
CFR terminals comply with applic-
able NEC requirements, are tested
in accordance with ARI Standard
880, and are certified by ARI.
Maintenance and Service. CFR fan
terminals require no periodic main-
tenance other than optional filter
replacement. If component replace-
ment becomes necessary, the unit
is designed to minimize field labor.
The bottom casing panels can be
removed to provide easy access to
the fan assembly, and the motor
electrical leads are easily unplugged.
Controls. Model CFR terminals are
available with analog electronic, con-
signment DDC, and pneumatic
controls. ENVIRO-TEC®manufac-
tures a complete line of analog
electronic controls specifically
designed for use with CFR termi-
nals. These controls are designed
to accommodate a multitude of
control schemes.
From the most basic to the most
sophisticated sequence of opera-
tion, the controls are designed by
experts in VAV terminal operation.
Refer to the Electronic Controls
Selection Guide, and the Pneu-
matic Controls Selection Guide for
a complete description of the
sequences and schematic drawings
that are available.
Standard features include the
patented FlowStarTM airflow sensor,
ETL Listing, NEMA 1 enclosure, 24
volt control transformer, floating
modulating actuator, brass bal-
ancing tees and plenum rated
tubing.

CFR • CONSTRUCTION FEATURES
4CFR Catalog • ©May, 2006 Environmental Technologies, Inc.
Model CFR
The CFR terminal incorporates many unique features. Most of these standard
features are expensive options for other manufacturers.
Integral discharge collar
simplifies field installation
All unit configurations
listed with ETL for
safety compliance
Product label includes
tagging, airflow, and
electrical information
Mechanical lock construction
ensures lowest possible
casing leakage
Full bottom removable
access panels
Low leakage damper incorporates
closed cell foam gasket
Roll formed inlet collar with integral
stiffening ribs adds strength and rigidity
Patented FlowStarTM airflow sensor
(Patent #5,481,925)
Galvanized steel casing withstands 125
hour salt spray test per ASTM B-117
Mechanically fastened
insulation for added
security
3/4" thick, 4lb/ft3skin,
dual density insulation
complying with UL 181
and NFPA 90A
Fan assembly utilizes a forward curved,
dynamically balanced, galvanized wheel
with a direct drive motor
Electrical devices
installed within a
NEMA 1enclosure,
with single point
power connection
Optional Construction Features
• ECM™ fan motor
• Mounting brackets to accept all-thread hanging rods or wire hangers
• Double wall construction
• Scrim reinforced foil faced insulation meeting ASTM C1136 for mold, mildew, and humidity resistance
• Filter located at induction inlet
• Hot water (CFR-WC), steam, or electric heating coils (CFR-EH) mounted at unit discharge. Access plate upstream
of hydronic coil is standard.
• Low temperature construction for use in thermal storage applications. Includes thermally isolated primary air
inlet and composite damper shaft.
• Factory control options: analog electronic, DDC electronic, pneumatic
• Factory piping packages (refer to Piping Packages catalog, Stock ID CAT-PIPING)
• Induction inlet gravity damper reduces radiated NC level by up to 2 NC at full cooling condition.

CONSTRUCTION FEATURES • CFR
©December, 2005 Environmental Technologies, Inc. • CFR Catalog 5
Each pressure input signal is routed
to the center averaging chamber
Equal concentric circular areas
Sizes 6 & 8: 3 Circles
Sizes 10 & 12: 4 Circles
Sizes 14 & 16: 5 Circles (shown)
Total pressure measured at the center
of each concentric circle for maximum
accuracy, as outlined in ASHRAE
Fundamentals Handbook.
Sizes 6 & 8: 12 Sensing Points
Sizes 10 & 12: 16 Sensing Points
Sizes 14 & 16: 20 Sensing Points
Brass field pressure
measuring tap
Airfoil shaped
averaging
chamber for low
pressure loss
and noise
Pressure output is
routed behind
probe to minimize
pressure loss
and noise
Accurate and Energy-Saving Airflow Control
With The Patented FlowStar™ Sensor
Many VAV terminals waste ener-
gy due to an inferior airflow
sensor design that requires the
minimum CFM setpoint to be
much higher than the IAQ cal-
culation requirement. This is
common with interior spaces
that will be effected year round.
These inferior VAV terminals waste
energy in several ways. First, the
primary air fan (e.g. AHU) supplies
more CFM than the building
requires. The higher minimum
CFM setpoint overcools the zone
with VAV terminals without inte-
gral heat. To maintain thermal
comfort a building engineer would
need to change the minimum set-
point to zero CFM compromising
indoor air quality. Inferior VAV
terminals with integral heat pro-
vide adequate comfort in the
space but waste significant ener-
gy as energy is consumed to
mechanically cool the primary
air only to have more energy
consumed to heat the cooled
primary air. Significant energy sav-
ings is obtained with proper
sizing and by making sure
approved VAV terminals are capa-
ble of controlling at low CFM
setpoints, providing the mini-
mum ventilation requirement.
Currently, most DDC controllers
have a minimum differential pres-
sure limitation between 0.015" and
0.05" w.g. The major DDC man-
ufacturers can control down to
0.015" w.g. An airflow sensor that
does not amplify, e.g., a Pitot tube,
requires about 490 FPM to devel-
op 0.015" w.g. differential
pressure. The FlowStar develops
0.015" w.g. pressure with only 290
FPM on a size 6 terminal and less
than 325 FPM for a size 16. Con-
sequently, VAV terminals utilizing
a non-amplifying type sensor
could have minimum CFM's that
are well over 50% higher than an
ENVIRO-TEC terminal. Many air-
flow sensors provide some degree
of amplification simply due to the
decrease in free area of the inlet
from large area of the sensor.
These VAV terminals still require
minimum CFM's up to 30% high-
er than an ENVIRO-TEC terminal,
have higher sound levels, and
higher pressure drop requiring
additional energy consumption at
the primary air fan.
A VAV system designed with
ENVIRO-TEC terminals con-
sumes significantly less energy
than a comparable system with
competitor's terminals. The
FlowStar airflow sensor reduces
energy consumption by allowing
lower zone minimum CFM set-
points, greatly reducing
or eliminating “reheat”, and by
imposing less resistance on the
primary air fan.
The ENVIRO-TEC®air valve features the Flow-
Star™ airflow sensor which has brought new
meaning to airflow control accuracy. The
multi-axis design utilizes between 12 and
20 sensing points that sample total
pressure at center points within equal
concentric cross- sectional areas, effectively
traversing the air stream in two planes. Each
distinct pressure reading is averaged with-
in the center chamber before exiting the
sensor to the controlling device.
This sensor adds a new dimension to
signal amplification. Most differential
pressure sensors provide a signal between
.5 and 2 times the equivalent velocity
pressure signal. The FlowStar™ provides
a differential pressure signal that is 2.5 to
3 times the equivalent velocity pressure
signal. This amplified signal allows more
accurate and stable airflow control at low
airflow capacities. Low airflow control is
critical for indoor air quality, reheat
minimization, and preventing over cool-
ing during light loads.
Unlike other sensors which use a large
probe surface area to achieve signal
amplification, the FlowStar™ utilizes an
unprecedented streamline design which
generates amplified signals unrivaled in the
industry. The streamlined design also
generates less pressure drop and noise.
The VAV schedule should specify the
minimum and maximum airflow setpoints,
maximum sound power levels, and
maximum air pressure loss for each terminal.
The specification for the VAV terminal must
detail the required performance of the
airflow sensor. For maximum building
occupant satisfaction, the VAV system
designer should specify the airflow sensor
as suggested in the Guide Specifications
of this catalog.
FlowStar™ Airflow Sensor
Patent #5,481,925

CFR • APPLICATION AND SELECTION
6CFR Catalog • ©December, 2005 Environmental Technologies, Inc.
PURPOSE OF SERIES FLOW
FAN TERMINALS
Series flow fan powered termi-
nals offer improved space comfort
and flexibility in a wide variety of
applications. Substantial operat-
ing savings can be realized through
the recovery of waste heat, reduced
central fan horsepower require-
ments and night setback operation.
Heat Recovery. The CFR recovers
heat from lights and core areas to
offset heating loads in perimeter
zones. Additional heat is available
at the terminal unit using electric,
steam, or hot water heating coils.
Controls are available to energize
remote heating devices such as wall
fin, fan coils, radiant panels, and
roof load plenum unit heaters.
IAQ. The CFR enhances the indoor
air quality of a building by providing
constant air motion, and higher air
volumes in the heating mode than
typically provided by straight VAV
single duct terminals or parallel flow
fan terminals. The higher air
capacity provides continuous air
motion in the space and lowers the
heating discharge air temperature.
This combination improves air cir-
culation, preventing accumulation
of CO2concentrations in stagnant
areas. Increased air motion
improves occupant comfort. The
higher air capacity also improves
the performance of diffusers and
minimizes diffuser “dumping”.
ACOUSTICAL CONCEPTS
The focus on indoor air quality is
also having an effect on proper
selection of air terminal equip-
ment with respect to acoustics.
Sound. At the zone level, the
terminal unit generates acoustical
energy that can enter the zone along
two primary paths. First, sound from
the unit fan can propagate through
the downstream duct and diffusers
before entering the zone (referred
to as Discharge or Airborne Sound).
Acoustical energy is also radiated
from the terminal casing and trav-
els through the ceiling cavity and
ceiling system before entering the
zone (referred to as Radiated Sound).
To properly quantify the amount of
acoustical energy emanating from
a terminal unit at a specific oper-
ating condition (i.e. CFM and static
pressure), manufacturers must mea-
sure and publish sound power
levels.
The units of measurement, decibels,
actually represent units of power
(watts). The terminal equipment
sound power ratings provide a
consistent measure of the generated
sound independent of the envi-
ronment in which the unit is
installed. This allows a straight for-
ward comparison of sound
performance between equipment
manufacturers and unit models.
Noise Criteria (NC). The bottom
line acoustical criteria for most
projects is the NC (Noise Criteria)
level. This NC level is derived from
resulting sound pressure levels in
the zone. These sound pressure lev-
els are the effect of acoustical
energy (sound power levels)
entering the zone caused by the ter-
minal unit and other sound
generating sources (central fan sys-
tem, office equipment, outdoor
environment, etc.).
The units of measurement is once
again decibels; however, in this
case decibels represent units of
pressure (Pascals), since the human
ear and microphones react to pres-
sure variations.
There is no direct relationship
between sound power levels and
sound pressure levels. Therefore,
we must predict the resulting sound
pressure levels (NC levels) in the zone
based in part by the published
sound power levels of the terminal
equipment. The NC levels are total-
ly dependent on the project specific
design, architecturally and mechan-
ically. For a constant operating
condition (fixed sound power
levels), the resulting NC level in the
zone will vary from one project to
another.
ARI 885. A useful tool to aid in pre-
dicting space sound pressure levels
is an application standard referred
to as ARI Standard 885. This stan-
dard provides information (tables,
formulas, etc.) required to calculate
the attenuation of the ductwork, ceil-
ing cavity, ceiling system, and
conditioned space below a termi-
nal unit. These attenuation values
are referred to as the “transfer
function” since they are used to
transfer from the manufacturer’s
sound power levels to the esti-
mated sound pressure levels resulting
in the space below, and/or served
by the terminal unit. The standard
does not provide all of the neces-
sary information to accommodate
every conceivable design; howev-
er, it does provide enough
information to approximate the
transfer function for most appli-
cations. Furthermore, an Appendix
is provided that contains typical
attenuation values. Some manu-
facturers utilize different assumptions
with respect to a "typical" project
design; therefore, cataloged NC
levels should not be used to com-
pare acoustical performance. Only
certified sound power levels should
be used for this purpose.
GENERAL DESIGN
RECOMMENDATIONS FOR A
QUIET SYSTEM
The AHU. Sound levels in the
zone are frequently impacted by cen-
tral fan discharge noise that
either breaks out (radiates) from the
ductwork or travels through the dis-
tribution ductwork and enters the
zone as airborne (discharge) sound.

APPLICATION AND SELECTION • CFR
©December, 2005 Environmental Technologies, Inc. • CFR Catalog 7
Achieving acceptable sound levels
in the zone begins with a proper-
ly designed central fan system
which delivers relatively quiet air to
each zone.
Supply Duct Pressure. One primary
factor contributing to noisy systems
is high static pressure in the primary
air duct. This condition causes high-
er sound levels from the central fan
and also higher sound levels from
the terminal unit, as the primary air
valve closes to reduce the pressure.
This condition is compounded when
flexible duct is utilized at the ter-
minal inlet, which allows the central
fan noise and air valve noise to break
out into the ceiling cavity and then
enter the zone located below
the terminal. Ideally, the system
static pressure should be reduced
to the point where the terminal unit
installed on the duct run associat-
ed with the highest pressure drop
has the minimum required inlet pres-
sure to deliver the design airflow
to the zone. Many of today’s
HVAC systems experience 0.5" w.g.
pressure drop or less in the main
trunk. For systems that will have
substantially higher pressure
variances from one zone to anoth-
er, special attention should be paid
to the proper selection of air ter-
minal equipment.
To date, the most common approach
has been to select (size) all of the ter-
minals based on the worst case
(highest inlet static pressure) condi-
tion. Typically, this results in 80% (or
higher) of the terminal units being
oversized for their application. This
in turn results in much higher equip-
ment costs, but more importantly,
drastically reduced operating
efficiency of each unit. This conse-
quently decreases the ability to
provide comfort control in the zone.
In addition, the oversized terminals
cannot adequately control the min-
imum ventilation capacity required
in the heating mode.
A more prudent approach is to uti-
lize a pressure reducing device
upstream of the terminal unit on
those few zones closest to the
central fan. This device could sim-
ply be a manual quadrant type
damper if located well upstream of
the terminal inlet. In tight quarters,
perforated metal can be utilized as
a quiet means of reducing system
pressure. This approach allows all
of the terminal units to experience
a similar (lower) inlet pressure.
They can be selected in a consistent
manner at lower inlet pressure
conditions that will allow more
optimally sized units.
Inlet duct that is the same size as
the inlet collar and as straight as pos-
sible will achieve the best acoustical
performance. For critical applica-
tions, flexible duct should not be
utilized at the terminal inlet.
Zoning. On projects where inter-
nal lining of the downstream duct
is not permitted, special consider-
ations should be made to assure
acceptable noise levels will be
obtained. In these cases, a greater
number of smaller zones will help
in reducing sound levels. Where pos-
sible, the first diffuser takeoff
should be located after an elbow
or tee and a greater number of small
necked diffusers should be uti-
lized, rather than fewer large necked
diffusers.
The downstream ductwork should
be carefully designed and
installed to avoid noise
regeneration. Bull head tee
arrangements should be
located sufficiently down-
stream of the terminal
discharge to provide an
established flow pattern
downstream of the fan.
Place diffusers downstream
of the terminal after the
airflow has completely
developed.
Downstream splitter dampers can
cause noise problems if placed
too close to the terminal, or when
excessive air velocities exist. If tee
arrangements are employed,
volume dampers should be used in
each branch of the tee, and bal-
ancing dampers should be provided
at each diffuser tap. This arrange-
ment provides maximum flexibility
in quiet balancing of the system.
Casing radiated sound usually dic-
tates the overall room sound levels
directly below the terminal. Because
of this, special consideration should
be given to the location of these
terminals as well as to the size of
the zone. Larger zones should have
the terminal located over a corri-
dor or open plan office space and
not over a small confined private
office. Fan powered terminals
should never be installed over
small occupied spaces where the
wall partitions extend from slab-to-
slab (i.e. fire walls or privacy walls).
Fan Terminal Isolation. Model CFR
fan terminals are equipped with suf-
ficient internal vibration dampening
means to prevent the need for addi-
tional external isolation. Flexible
duct connectors at the unit dis-
charge typically do more harm
than good. The sagging membrane
causes higher air velocities and
turbulence, which translates into
noise. Furthermore, the discharge
noise breaks out of this fitting
more than with a hard sheet metal
fitting.
IDEAL DUCT DESIGN
Small Necked Diffusers
High Quality
VAV Terminal
with Low
Sound Levels
Minimum
Required
Inlet Static
Pressure
Multiple
Branch
Take-Offs
Damper
Located at
Take-Off
Short Length of
Non-Metallic Flexible Duct

CFR • APPLICATION AND SELECTION
8CFR Catalog • ©December, 2005 Environmental Technologies, Inc.
SELECTION GUIDELINES
The CFR fan terminal has been
designed to provide maximum
flexibility in matching primary air
valve capacities (cooling loads)
with unit fan capacities. The over-
all unit size is dictated by the fan
size. With each unit fan size, mul-
tiple primary air valve sizes are
available to handle a wide range
of cooling capacities.
The fan should be sized first to
determine the unit size. The selec-
tion is made by cross plotting the
specified fan capacity and external
static pressure on the appropriate
fan performance curves (see page
16). Terminals utilizing hot water
heating coils require the summa-
tion of the coil air pressure drop
and the design E.S.P. to determine
the total E.S.P. It is common to have
more than one fan size which can
meet the design requirements.
Typically, the selection begins with
the smallest fan that can meet the
capacity. Occasionally this selec-
tion may not meet the acoustical
requirements and thus the next larg-
er fan size should be selected.
“Upsizing” may also occur when it
is necessary to meet the design
capacity on the medium or low
motor tap.
Fan selections can be made any-
where in the non-shaded areas.
Each fan performance curve depicts
the actual performance of the rel-
ative motor tap without additional
fan balance adjustment. Actual
specified capacities which fall below
a particular fan curve (low, medi-
um or high) is obtained by adjust-
ment of the electronic (SCR) fan
speed controller. After the proper
fan is selected, the unit size is
fixed and then the appropriate
primary air valve is selected. Most
of the unit fan sizes have three air
valve sizes to select from. The mid-
dle size will typically be utilized. It
is the size that is matched with the
unit fan to deliver 100% cooling
capacity for the majority of fan selec-
tions.
The larger primary air valve will be
used in applications where the
system fan is undersized, requiring
a larger air valve to take advantage
of lower pressure losses. While help-
ing in this fashion, a penalty is paid
by having a higher controllable min-
imum airflow setpoint than could
be achieved with a smaller inlet size.
The smaller primary air valve will
most often be utilized with ther-
mal storage systems where lower
than normal primary air tempera-
tures are utilized. In these cases,
the maximum design primary air-
flow is less than the fan capacity
(typically 60 to 80%), and therefore
a smaller air valve may be appro-
priate.
SYSTEM PRESSURE
CONSIDERATIONS
Since the terminal unit fan is select-
ed to move 100% of the design
airflow to the zone, all down-
stream pressure losses are neglected
when determining minimum pri-
mary air inlet pressure to the unit.
The central fan is only required to
overcome the minimal loss through
the unit air valve, reducing the
central fan total pressure and
horsepower requirements. Due to
extremely low pressure drop of the
air valve, central fan operating
inlet static pressures may be as low
as 0.5" w.g.
COMMON MISAPPLICATION
It should be noted that a conven-
tional Series Flow Fan Terminal
cannot be applied as a booster fan.
In problem areas where there is
insufficient primary airflow capac-
ity, this terminal will not aid in
pulling more air from the primary
duct. Instead the unit fan will draw
air from the plenum inlet which has
less resistance.
The induction opening should
never be sealed, as this will cause
problems should the primary air-
flow increase beyond the unit fan
capacity. In this condition, the fan
casing becomes pressurized which
will eventually stall the fan motor
and cause premature failure.
An ENVIRO-TEC® Windows®
based Computer Selection
Program is also available for com-
plete CFR automated selection.

PRIMARY AIRFLOW CALIBRATION • CFR
©May, 2006 Environmental Technologies, Inc. • CFR Catalog 9
.015 .03 .05 1.0 > 1.5
0404 43 250 35 250 30 43 55 250 250
0504, 0506 68 350 50 350 48 68 88 350 350
0604, 0606, 0611 75 490 60 550 53 75 97 435 530
0806, 0811, 0818 145 960 115 1000 105 145 190 840 1000
1011, 1018, 1021 235 1545 185 1600 165 235 305 1355 1600
1218, 1221, 1224, 1230 340 2250 285 2300 240 340 440 1975 2300
1421, 1424, 1430 475 3100 390 3100 335 475 615 2750 3100
1630, 1640, 1644 625 4100 520 4100 440 625 805 3595 4100
1844 810 4600 640 4600 580 810 1040 4470 4600
UNIT SIZE
MIN.
MAX.
MIN.
MAX.
400 SERIES (PNEUMATIC)
STANDARD CONTROLLER
7000 SERIES ANALOG
ELECTRONIC
DDC CONSIGNMENT CONTROLS
(See Notes Below)
MIN.
MAX.
Min. transducer
differential pressure
(in. w.g.)
Max. transducer
differential pressure
(in. w.g.)
Airflow Ranges (CFM)
1Minimum and maximum airflow limits are dependent on the specific DDC controller supplied. Contact the control vendor to
obtain the minimum and maximum differential pressure limits (inches W.G.) of the transducer utilized with the DDC controller.
2Maximum CFM is limited to value shown in General Selection Data.
FlowStar™ Calibration Chart
(For dead-end differential pressure transducers)
NOTE: Maximum and minimum CFM limits are dependent on the type of controls that are utilized. Refer to the table below for
specific values. When DDC controls are furnished by others, the CFM limits are dependent on the specific control vendor that is employed.
After obtaining the differential pressure range from the control vendor, the maximum and minimum CFM limits can be obtained from
the chart above (many controllers are capable of controlling minimum setpoint down to .015" w.g.).

CFR • DIMENSIONAL DATA
10 CFR Catalog • ©December, 2005 Environmental Technologies, Inc.
MODEL CFR
Top View
(Pneumatic Controls
Not Shown in This View)
Left Side View
(Control Enclosure and Filter Rack
Not Shown in This View)
Inlet End View
(Electronic Controls and Filter Rack
Not Shown in This View)
UNIT
SIZE
IABCDXYWHL
0404
3 7/8
[98]
6
[152]
5
[127]
3/4
[19]
10 1/2
[267]
8 3/8
[213]
8
[203]
18
[457]
12
[305]
28
[711]
0504
4 7/8
[124]
6
[152]
5
[127]
3/4
[19]
10 1/2
[267]
8 3/8
[213]
8
[203]
18
[457]
12
[305]
28
[711]
0604
5 7/8
[149]
6
[152]
5
[127]
3/4
[19]
6 1/2
[165]
8 3/8
[213]
8
[203]
18
[457]
12
[305]
28
[711]
0506
4 7/8
[124]
6
[152]
2 1/4
[57]
3/4
[19]
10 1/2
[267]
11
[279]
11
[279]
23 3/8
[594]
14
[356]
35
[889]
0606
5 7/8
[149]
6
[152]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
11
[279]
11
[279]
23 3/8
[594]
14
[356]
35
[889]
0806
7 7/8
[251]
6
[152]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
11
[279]
11
[279]
23 3/8
[594]
14
[356]
35
[889]
0611
5 7/8
[149]
6
[152]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
11
[279]
11
[279]
23 3/8
[594]
14
[356]
35
[889]
0811
7 7/8
[200]
6
[152]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
11
[279]
11
[279]
23 3/8
[594]
14
[356]
35
[889]
1011
9 7/8
[251]
7
[178]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
11
[279]
11
[279]
23 3/8
[594]
14
[356]
35
[889]
0818
7 7/8
[200]
8
[203]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
15
[381]
13 1/2
[343]
29 3/8
[746]
17
[432]
40
[1016]
1018
9 7/8
[251]
8
[203]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
15
[381]
13 1/2
[343]
29 3/8
[746]
17
[432]
40
[1016]
1218
11 7/8
[302]
8
[203]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
15
[381]
13 1/2
[343]
29 3/8
[746]
17
[432]
40
[1016]
1021
9 7/8
[251]
8
[203]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
15
[381]
13 1/2
[343]
29 3/8
[746]
17
[432]
40
[1016]
1221
11 7/8
[302]
8
[203]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
15
[381]
13 1/2
[343]
29 3/8
[746]
17
[432]
40
[1016]
1421
13 7/8
[352]
9
[229]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
15
[381]
13 1/2
[343]
29 3/8
[746]
17
[432]
40
[1016]
1224
11 7/8
[302]
10
[254]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
28
[711]
15
[381]
38
[965]
19
[483]
54
[1372]
1424
13 7/8
[352]
10
[254]
2 1/4
[57]
3/4
[19]
6 1/2
[165]
28
[711]
15
[381]
38
[965]
19
[483]
54
[1372]
1230
11 7/8
[302]
10
[254]
9 3/4
[248]
1 1/4
[32]
6 1/2
[165]
40
[1016]
15
[381]
52
[1321]
19
[483]
62
[1575]
1430
13 7/8
[352]
11 1/2
[292]
9 3/4
[248]
1 1/4
[32]
6 1/2
[165]
40
[1016]
15
[381]
52
[1321]
19
[483]
62
[1575]
1630
15 7/8
[403]
11 1/2
[292]
9 3/4
[248]
1 1/4
[32]
6 1/2
[165]
40
[1016]
15
[381]
52
[1321]
19
[483]
62
[1575]
1440
13 7/8
[352]
11 1/2
[292]
9 3/4
[248]
1 1/4
[32]
6 1/2
[165]
40
[1016]
15
[381]
52
[1321]
19
[483]
62
[1575]
1640
15 7/8
[403]
11 1/2
[292]
9 3/4
[248]
1 1/4
[32]
6 1/2
[165]
40
[1016]
15
[381]
52
[1321]
19
[483]
62
[1575]
1644
15 7/8
[403]
11 1/2
[292]
9 3/4
[248]
3 1/4
[83]
6 1/2
[165]
40
[1016]
15
[381]
52
[1321]
19
[483]
62
[1575]
1844
15 7/8
[403] x
15 7/8
[403]
11 1/2
[292]
9 3/4
[248]
3 1/4
[83]
6 1/2
[165]
40
[1016]
15
[381]
52
[1321]
19
[483]
62
[1575]
NOTE: All dimensions are in inches [mm].
Drawings are not to scale and not for submittal or installation purposes. Refer to www.enviro-tec.com for current submittal drawings.

DIMENSIONAL DATA • CFR
©December, 2005 Environmental Technologies, Inc. • CFR Catalog 11
MODEL CFR-WC HOT WATER COIL DETAIL
MODEL CFR-EH ELECTRIC HEATER DETAIL
Right Side View Discharge End View
Fan Sizes 30, 40, and 44
FAN
SIZE
GJ KM
04
10
[254]
12
[305]
10
[254]
3
[76]
06,11
10
[254]
16
[406]
12 1/2
[318]
1/2
[13]
18,21
10
[254]
22
[559]
12 1/2
[318]
1/2
[13]
24
10
[254]
28
[711]
17 1/2
[445]
1/2
[13]
30,40
6
[152]
40
[1016]
17 1/2
[445]
9 3/4
[248]
44
6
[152]
44
[1118]
17 1/2
[445]
5 3/4
[146]
Fan Sizes 04, 06, 11, 18, 21 and 24
NOTE: All dimensions are in inches [mm].
Drawings are not to scale and not for submittal or installation purposes. Refer to www.enviro-tec.com for current submittal drawings.

CFR • GENERAL SELECTION, PSC MOTOR
12 CFR Catalog • ©December, 2005 Environmental Technologies, Inc.
See notes on following page. The ENVIRO-TEC®Windows®based Computer Selection Program is available through
your ENVIRO-TEC®representative for complete CFR selection and performance data.
DIS.
0.5" 1.0" 3.0" LOW MED HI LOW MED HI LOW MED HI LOW MED HI
100 0.01 0.70 -- 27 27 27
150 0.02 0.70 -- 27 28 30
200 0.03 0.67 -- 28 28 33
250 0.04 0.60 -- 32 32 36
100 0.01 0.70 -- 22 25 26
200 0.02 0.67 -- 22 25 30
250 0.02 0.60 -- 25 27 32
300 0.03 0.51 -- 27 30 35
350 0.04 0.42 20 33 35 36
200 0.05 0.67 -- 23 23 28
250 0.07 0.60 -- 28 30 31
300 0.10 0.51 -- 28 30 33
350 0.14 0.42 20 32 33 36
400 0.19 0.30 20 33 33 36
300 0.04 0.76 -- 26 30 36
350 0.05 0.71 -- 30 33 39
300 0.10 0.76 -- 23 25 33
350 0.14 0.71 -- 25 27 35
400 0.19 0.65 -- 28 31 36
450 0.23 0.58 -- 30 32 38
550 0.34 0.42 23 34 36 40
300 0.03 0.76 -- 23 25 33
350 0.04 0.71 -- 25 27 35
400 0.05 0.65 -- 28 31 36
450 0.06 0.58 -- 30 32 38
550 0.09 0.42 23 34 36 40
400 0.27 0.80 -- 24 28 35
500 0.40 0.80 -- 28 33 37
400 0.03 0.80 -- 20 24 33
500 0.05 0.80 -- 23 27 35
600 0.07 0.80 -- 27 31 37
800 0.11 0.80 22 32 35 40
1000 0.17 0.70 28 37 39 43
600 0.03 0.80 -- 26 30 37
800 0.06 0.80 22 33 36 41
1000 0.09 0.70 28 37 40 45
1200 0.13 0.45 31 41 42 47
600 0.11 0.90 -- 27 30 36
800 0.19 0.90 -- 31 32 39
1000 0.30 0.88 23 35 36 42
600 0.02 0.90 -- 26 28 38
800 0.04 0.90 -- 27 31 39
1000 0.06 0.88 23 30 33 40
1200 0.08 0.82 26 33 36 43
1400 0.11 0.75 30 38 40 46
1600 0.15 0.59 33 41 43 48
800 0.02 0.90 -- 30 32 40
1000 0.03 0.88 23 32 36 41
1200 0.05 0.82 26 36 39 43
1400 0.06 0.75 30 39 41 46
1600 0.07 0.59 33 42 45 50
1800 0.09 0.40 35 45 47 51
800 0.06 0.90 -- 26 31 38
1000 0.10 0.90 -- 30 33 40
1200 0.13 0.88 24 35 38 43
1400 0.18 0.82 26 38 40 46
1600 0.24 0.77 29 40 42 48
800 0.02 0.90 -- 24 28 40
1100 0.04 0.90 21 30 33 41
1400 0.06 0.82 26 36 38 45
1700 0.09 0.73 31 40 41 48
2000 0.13 0.54 35 43 46 51
2300 0.15 0.23 39 48 48 53
1100 0.04 0.90 21 32 36 40
1400 0.06 0.82 26 38 41 46
1700 0.09 0.73 31 42 45 50
2000 0.13 0.54 35 46 47 52
2300 0.15 0.23 39 50 51 55
.9
1.0
3.7
4.1
4.9
1.4
2.2
2.4
2.7
.8
1.4
.9
.55
.6
.37
.45
0.50
INLET
ΔΔ
Ps
MIN.
ΔPs
(IN. W.G.)
RADIATED
UNIT
SIZE
CFM
MAX
E.S.P.
(IN. W.G.)
ROOM NOISE CRITERIA (NC)
FAN
ONLY
0611
0806
0606
0404
0506
0604
0504
1018
0818
1011
0811
1421
1/2
1/3
1/4
1/3
1/2
3/4
1221
1021
1218
HORSEPOWER / AMPERAGE DATA
1/8
1/10
1/8
1/5
1/4
.5
.8
1.1
.3
1221
1421
AMPERAGE
115V
208V
277V
FAN HP
1/12
1/6
.4
0818
1018
1218
1021
0806
0611
0811
1011
UNIT
SIZE
1/60
1/25
0606
0404
0504
0604
0506
1.7
2.0
8.8
9.3
9.6
2.8
2.9
3.6
2.3
2.7
9.4
10.3
10.5
3.6
2.5
3.7
4.3
4.2
3.2
4.0
2.2
1.5
1.1
Shaded Unit Sizes (i.e. 0404, 0504, 0606, 0811, 1018, 1221) indicate the most commonly specified selections.

GENERAL SELECTION, PSC MOTOR • CFR
©December, 2005 Environmental Technologies, Inc. • CFR Catalog 13
DIS.
0.5" 1.0" 3.0" LOW MED HI LOW MED HI LOW MED HI LOW MED HI
1100 0.04 1.10 21 31 36 43
1400 0.06 1.10 26 37 40 46
1700 0.09 1.03 29 39 42 48
2000 0.12 0.82 32 43 46 52
2300 0.17 0.56 35 48 48 55
1100 0.02 1.10 21 31 36 43
1400 0.04 1.10 26 37 40 46
1700 0.07 1.03 29 39 42 48
2000 0.08 0.82 32 43 46 52
2300 0.11 0.56 35 48 48 55
2600 0.14 0.25 37 51 51 55
1100 0.04 0.90 -- 26 27 33
1500 0.05 0.85 20 30 31 38
1900 0.09 0.78 23 33 35 40
2300 0.12 0.68 27 38 38 43
1100 0.03 0.90 -- 26 28 32
1500 0.05 0.85 20 30 31 38
1900 0.07 0.78 23 35 36 41
2300 0.10 0.68 27 37 38 43
2700 0.13 0.56 30 40 40 46
3100 0.18 0.40 33 42 43 50
1500 0.02 0.85 20 30 31 38
1900 0.04 0.78 23 32 35 40
2300 0.06 0.68 27 36 38 42
2700 0.08 0.56 30 38 40 45
3100 0.10 0.40 33 41 42 47
1600 0.06 0.90 -- 26 28 37
2100 0.10 0.90 22 31 33 41
2600 0.14 0.87 26 36 37 45
3100 0.20 0.80 31 41 42 47
1600 0.04 0.90 -- 27 31 38
2100 0.07 0.90 22 31 33 41
2600 0.11 0.87 26 35 38 43
3100 0.15 0.80 31 41 42 47
3600 0.21 0.66 34 45 45 50
4100 0.28 0.40 38 50 50 53
2100 0.05 1.10 21 30 32 40
2600 0.09 1.10 25 33 36 42
3100 0.12 1.00 28 38 39 45
3600 0.17 0.88 32 42 43 48
4100 0.22 0.62 36 46 46 51
2100 0.10 1.10 21 27 34 43
2600 0.15 1.10 25 31 37 45
3100 0.22 1.00 28 36 40 46
3600 0.30 0.88 32 40 42 48
4100 0.44 0.62 36 43 45 52
4600 0.56 0.33 39 50 50 56
10.6
5.6
3.6
8.0
5.4
4.6
5.0
6.4
8.4
UNIT
SIZE
1224
1424
1230
1844
17.8
1.0
(2)
3/4
(2)
1/2
(2)
277V
FAN HP
9.0
7.6
6.8
24.6
22.0
3/4
(2)
18.8
1/3
(2)
HORSEPOWER / AMPERAGE DATA
21.0
7.2
7.4
8.6
AMPERAGE
115V
1/3
(2)
1/4
(2)
208V
1/2
(2)
19.2
18.6
17.6
1/2
(2)
20.6
1440
1640
1644
1844
1630
1224
1424
1230
1430
INLET
ΔΔ
Ps
MIN.
ΔPs
(IN. W.G.)
RADIATED
UNIT
SIZE
CFM
MAX
E.S.P.
(IN. W.G.)
ROOM NOISE CRITERIA (NC)
FAN
ONLY
4.5
7.2
5.8
5.6
11.0
12.3
3.4
3.8
1.8
2.8
5.3
1/2
3/4
1.0
8.9
1430
1440
1640
1644
1630
The ENVIRO-TEC®Windows®based Computer Selection Program is available through your ENVIRO-TEC®representative for
complete CFR selection and performance data.
NOTES:
• Min. ΔPs is the static pressure difference across the primary air valve with
the damper wide open. All downstream losses (including optional hot
water coil) are handled by the unit fan and need not be considered for
primary air performance calculations.
• Max. E.S.P. is the external static pressure available on high tap at the
airflow capacity indicated. Optional hot water coil pressure loss is not
included with these values.
• Performance data obtained from tests conducted in accordance with ARI
Standard 880.
• Dash (-) indicates NC level less than 20.
• NC values calculated based upon the 2002 Addendum to ARI Standard
885 Appendix E Typical Sound Attenuation Values (shown at right),
using Ceiling Type 2 for calculating Radiated NC.
234567
Small Box (< 300 CFM) 24 28 39 53 59 40
Medium Box (300-700 CFM) 27 29 40 51 53 39
Large Box (> 700 CFM) 29 30 41 51 52 39
234567
Type 2 - Mineral Fiber Ceiling 18 19 20 26 31 36
OCTAVE BAND
OCTAVE BAND
RADIATED
ATTENUATION VALUES
DISCHARGE
ATTENUATION VALUES
Shaded Unit Sizes (i.e. 1430, 1640) indicate the most commonly specified selections.

CFR • SOUND POWER DATA
14 CFR Catalog • ©December, 2005 Environmental Technologies, Inc.
The ENVIRO-TEC®Windows®based Computer Selection Program is available through your ENVIRO-TEC®representative for
complete CFR selection and performance data.
NOTES:
• Data obtained from tests conducted in accordance with ARI Standard 880.
• Sound levels are expressed in decibels, dB re: 1 x 10-12 Watts.
• Fan external static pressure is 0.25 inches w.g.
234567234567234567234567
100 57 54 53 52 46 42 64 56 49 40 34 34 64 58 49 40 35 35 64 58 51 44 42 44
150 57 54 53 52 46 42 64 56 49 40 35 34 64 59 51 42 37 36 64 60 54 47 45 45
200 57 54 53 52 46 42 65 56 49 40 35 34 65 59 52 43 38 36 65 61 58 50 47 45
250 59 58 57 56 51 47 68 61 53 44 38 36 68 62 55 46 40 38 68 65 61 53 49 47
100 57 54 53 52 46 42 59 54 48 39 32 30 60 56 49 40 34 33 60 57 50 44 42 44
200 57 54 53 52 46 42 59 54 47 39 32 30 60 56 50 41 34 33 60 57 55 48 44 44
250 59 58 57 56 51 47 60 56 49 41 33 31 63 58 52 43 36 35 63 60 57 50 46 45
300 60 59 57 56 52 48 61 58 51 43 34 32 66 59 54 45 38 36 66 62 60 52 47 46
350 61 62 59 59 54 51 66 63 54 46 39 37 70 63 56 47 41 39 70 65 61 53 48 46
200 57 54 53 52 46 42 57 55 46 38 30 28 57 55 48 39 33 31 59 57 54 47 43 42
250 59 58 57 56 51 47 63 59 50 41 33 32 61 60 51 43 35 33 62 61 56 49 44 43
300 60 59 57 56 52 48 62 59 50 42 33 32 61 60 52 43 35 33 64 61 58 50 45 43
350 61 62 59 59 54 51 68 62 53 45 36 36 67 63 54 46 38 37 66 65 60 51 45 43
400 62 62 59 60 55 52 69 63 54 46 37 37 68 63 56 47 39 38 68 65 61 52 46 45
300 54 53 53 54 50 46 59 56 52 46 43 45 63 60 55 48 48 48 64 64 61 54 51 50
350 57 56 55 55 53 50 62 58 55 48 47 48 66 63 57 50 46 48 68 67 64 57 53 51
200 52 52 51 51 46 41 53 49 46 42 37 41 54 51 48 43 40 41 57 56 54 51 47 46
300 54 53 53 54 50 46 56 53 49 42 38 41 58 56 51 44 40 41 62 60 58 51 47 46
350 57 56 55 55 53 50 58 55 51 44 40 42 60 58 53 46 41 42 64 62 60 53 48 46
400 59 58 57 57 55 53 60 58 54 47 41 42 62 60 56 48 42 43 66 64 61 54 48 47
450 62 61 60 59 57 55 62 60 55 49 42 41 63 62 57 50 43 42 67 66 63 55 49 47
550 66 64 62 63 61 59 65 63 59 52 46 44 66 65 60 53 47 45 69 68 65 57 51 49
300 54 53 53 54 50 46 56 53 49 42 38 41 58 56 51 44 40 41 62 60 58 51 47 46
350 57 56 55 55 53 50 58 55 51 44 40 42 60 58 53 46 41 42 64 62 60 53 48 46
400 59 58 57 57 55 53 60 58 54 47 41 42 62 60 56 48 42 43 66 64 61 54 48 47
450 62 61 60 59 57 55 62 60 55 49 42 41 63 62 57 50 43 42 67 66 63 55 49 47
550 66 64 62 63 61 59 65 63 59 52 46 44 66 65 60 53 47 45 69 68 65 57 51 49
400 59 53 52 46 43 41 59 55 50 44 33 29 61 58 54 46 40 37 65 62 60 54 49 47
500 61 55 55 50 48 47 62 59 54 48 38 33 63 62 58 49 42 39 68 65 62 56 50 48
400 59 53 52 46 43 41 56 52 46 38 32 32 58 55 50 43 37 37 62 59 58 53 47 47
500 61 55 55 50 48 47 58 55 48 40 33 33 61 58 52 45 39 38 65 62 60 55 48 48
600 63 57 59 54 52 52 60 58 51 43 35 35 63 61 54 47 40 39 67 65 62 56 49 49
800 66 62 63 60 58 58 65 62 56 50 40 40 66 64 58 51 43 42 72 69 64 57 50 50
1000 72 67 68 67 65 65 68 66 59 54 45 46 70 68 61 56 47 47 74 72 67 60 52 52
600 63 57 59 54 52 52 61 57 51 44 34 32 64 60 55 47 38 37 67 65 62 54 47 46
800 66 62 63 60 58 58 66 63 57 50 40 40 69 65 59 51 42 41 72 70 65 57 49 48
1000 72 67 68 67 65 65 69 66 60 53 44 44 71 69 62 55 46 46 74 73 67 60 51 50
1200 74 70 72 71 68 68 72 70 64 57 48 49 73 71 65 58 49 49 78 75 70 62 54 54
600 62 58 56 50 48 45 56 58 49 41 37 33 59 60 53 45 38 35 65 65 60 53 47 44
800 64 61 59 56 53 52 62 61 54 46 39 37 63 62 57 48 41 37 69 68 63 56 50 47
1000 67 64 63 61 59 59 65 64 58 50 43 40 66 65 61 52 45 41 72 71 66 58 52 49
600 62 58 56 50 48 45 55 57 48 38 32 29 59 59 52 43 38 35 63 64 63 54 47 46
800 64 61 59 56 53 52 58 58 50 39 33 31 62 61 55 46 39 36 67 67 64 55 49 47
1000 67 64 63 61 59 59 62 60 52 44 38 36 64 63 56 47 41 38 71 69 65 56 50 48
1200 69 68 66 65 63 63 65 63 56 48 42 40 67 65 58 50 43 41 73 72 66 58 52 50
1400 70 70 69 69 67 67 69 67 58 51 46 45 71 69 61 53 47 46 76 74 67 60 54 52
1600 72 73 72 72 70 70 72 70 61 54 49 48 73 72 63 56 50 49 78 76 69 62 55 54
800 64 61 59 56 53 52 60 60 52 46 37 32 62 62 55 48 42 38 66 67 65 57 50 49
1000 67 64 63 61 59 59 63 62 54 48 41 38 65 65 57 50 45 42 69 69 66 58 52 50
1200 69 68 66 65 63 63 66 65 57 51 46 44 69 68 60 53 48 46 73 72 67 59 53 51
1400 70 70 69 69 67 67 68 68 59 53 48 47 71 70 62 55 50 48 75 74 68 60 54 53
1600 72 73 72 72 70 70 71 71 62 56 51 50 73 73 64 57 52 50 77 77 69 62 56 55
1800 73 74 73 74 72 72 73 73 64 58 53 52 75 75 66 59 54 53 79 78 71 63 58 56
800 59 55 55 54 51 49 60 57 50 43 34 30 63 61 54 46 40 37 68 66 63 55 49 48
1000 62 60 60 58 56 55 65 60 53 46 36 33 67 63 57 49 42 39 72 69 65 57 51 50
1200 65 63 63 62 60 60 69 64 57 50 42 41 70 67 59 52 45 43 75 72 67 59 52 51
1400 68 65 66 65 63 63 71 67 60 53 45 43 72 69 61 54 47 45 77 74 68 60 54 52
1600 72 69 69 69 66 66 73 69 62 55 47 45 74 71 63 56 50 49 79 76 70 62 55 54
1021
1218
1018
0818
OCTAVE BAND NUMBER
DISCHARGE
FAN ONLY
0404
RADIATED
OCTAVE BAND NUMBER
0.5" INLET
ΔΔ
Ps
OCTAVE BAND NUMBER
3.0" INLET
ΔΔ
Ps
1.0" INLET
ΔΔ
Ps
OCTAVE BAND NUMBER
CFM
UNIT
SIZE
1011
0811
0611
0806
0606
0506
0604
0504
Shaded Unit Sizes (i.e. 0404, 0504, 0606, 0811, 1018) indicate the most commonly specified selections.

SOUND POWER DATA • CFR
©December, 2005 Environmental Technologies, Inc. • CFR Catalog 15
The ENVIRO-TEC®Windows®based Computer Selection Program is available through your ENVIRO-TEC®representative for
complete CFR selection and performance data.
234567234567234567234567
800 59 55 55 54 51 49 59 55 50 41 35 33 61 59 54 46 39 37 66 65 65 58 50 48
1100 64 61 61 60 58 57 63 60 54 45 38 37 65 63 56 49 42 40 70 69 66 59 51 49
1400 68 65 66 65 63 63 68 65 57 50 44 43 70 67 61 52 46 45 74 73 67 60 53 51
1700 73 70 70 70 67 68 71 69 61 53 47 46 73 70 63 55 49 48 77 76 70 62 56 54
2000 77 75 73 74 72 72 75 72 64 57 51 50 76 74 66 58 52 51 80 78 71 64 57 56
2300 80 78 76 78 76 76 78 76 67 61 55 54 79 76 68 62 56 55 82 80 73 65 59 58
1100 64 61 61 60 58 57 65 62 54 46 37 34 68 65 57 49 43 40 71 69 63 56 50 49
1400 68 65 66 65 63 63 69 67 58 50 45 43 72 70 61 53 47 46 75 74 67 59 52 51
1700 73 70 70 70 67 68 72 71 61 54 49 48 74 73 63 56 50 49 78 77 69 61 55 54
2000 77 75 73 74 72 72 76 74 65 58 53 52 77 75 66 58 53 52 80 79 71 63 57 56
2300 80 78 76 78 76 76 78 77 68 61 56 56 79 78 69 61 56 56 82 81 72 65 59 58
1100 64 62 61 60 58 57 64 61 53 45 36 35 67 65 57 48 39 36 71 71 68 57 46 42
1400 69 66 66 65 64 63 68 66 57 49 40 37 70 69 60 52 42 39 74 74 70 58 48 44
1700 72 69 69 68 67 66 70 68 59 52 43 41 72 71 61 54 45 42 76 76 69 60 52 48
2000 76 72 71 72 70 69 74 72 62 55 48 44 75 74 64 58 48 45 78 79 71 61 54 50
2300 78 75 73 75 73 72 76 76 65 58 51 49 77 76 66 60 53 50 80 81 72 63 56 53
1100 64 62 61 60 58 57 64 61 53 45 36 35 67 65 57 48 39 36 71 71 68 57 46 42
1400 69 66 66 65 64 63 68 66 57 49 40 37 70 69 60 52 42 39 74 74 70 58 48 44
1700 72 69 69 68 67 66 70 68 59 52 43 41 72 71 61 54 45 42 76 76 69 60 52 48
2000 76 72 71 72 70 69 74 72 62 55 48 44 75 74 64 58 48 45 78 79 71 61 54 50
2300 78 75 73 75 73 72 76 76 65 58 51 49 77 76 66 60 53 50 80 81 72 63 56 53
2600 80 77 75 77 75 74 77 78 67 60 53 51 78 78 67 61 54 52 81 81 72 64 57 54
1100 59 61 55 49 48 45 60 57 48 40 33 33 61 58 51 42 36 33 67 62 58 50 40 35
1500 62 63 57 52 52 49 64 60 52 43 35 34 65 61 54 45 39 35 73 66 62 52 44 40
1900 65 66 62 57 57 56 65 63 54 47 39 35 67 64 56 46 41 38 74 68 64 54 47 43
2300 68 69 65 61 61 61 70 67 59 51 43 39 71 67 60 52 44 40 77 71 66 56 50 46
1100 59 61 55 49 48 45 61 57 48 40 34 34 63 59 50 42 34 33 68 62 56 48 37 34
1500 62 63 57 52 52 49 65 60 52 44 35 34 66 61 53 45 35 33 73 66 60 50 39 35
1900 65 66 62 57 57 56 68 64 55 47 36 35 70 65 57 48 38 34 75 68 62 52 40 36
2300 68 69 65 61 61 61 69 66 57 50 42 38 71 67 59 51 43 39 77 71 66 56 46 43
2700 71 71 69 65 65 65 72 69 60 53 45 41 74 69 62 54 48 44 79 73 67 58 51 48
3100 74 74 72 70 70 70 76 71 63 56 49 46 76 72 64 57 50 46 82 76 69 60 53 50
1500 62 63 57 52 52 49 62 60 49 42 34 31 64 61 52 45 40 37 72 67 62 53 49 48
1900 65 66 62 57 57 56 67 62 54 46 35 32 69 64 56 48 42 38 74 69 63 54 50 49
2300 68 69 65 61 61 61 69 65 57 50 40 35 71 67 58 51 44 39 76 71 66 56 51 49
2700 71 71 69 65 65 65 71 67 59 52 45 40 73 69 61 53 46 42 78 72 66 57 53 50
3100 74 74 72 70 70 70 73 70 61 54 48 44 75 71 63 55 49 44 80 75 68 59 54 51
1600 62 59 57 53 53 52 62 57 50 42 31 29 64 59 53 40 32 29 72 65 61 50 38 33
2100 65 63 62 58 58 58 65 61 54 45 34 31 69 63 57 47 34 30 75 69 64 54 44 40
2600 68 66 66 62 62 63 70 65 58 48 37 33 71 66 60 50 39 34 78 72 66 56 46 42
3100 71 70 69 66 67 68 74 70 62 50 39 35 75 71 63 55 44 41 80 75 69 59 51 47
1600 62 59 57 53 53 52 61 58 50 43 38 36 63 61 53 45 38 37 72 67 61 52 44 39
2100 65 63 62 58 58 58 66 61 55 48 40 39 68 63 57 49 40 38 74 70 64 55 46 41
2600 68 66 66 62 62 63 69 64 57 50 42 41 71 67 60 53 44 40 77 72 66 56 48 45
3100 71 70 69 66 67 68 74 70 62 55 46 44 75 71 63 56 46 42 79 75 68 60 51 47
3600 74 73 72 70 71 71 77 73 66 59 52 47 78 73 66 58 51 47 82 77 71 63 55 50
4100 77 76 75 73 74 75 81 77 69 62 54 51 81 77 70 62 54 52 84 80 74 65 58 55
2100 67 64 63 61 57 56 64 60 53 46 37 29 66 62 56 49 40 35 73 68 65 57 51 45
2600 70 67 68 65 62 61 67 63 56 49 40 37 69 65 59 51 42 38 75 71 67 59 52 47
3100 72 70 71 69 66 65 71 67 60 53 43 40 72 68 61 53 44 40 77 73 69 60 54 49
3600 74 73 73 72 70 69 75 71 63 55 49 46 75 72 64 56 50 47 80 76 71 63 56 52
4100 77 76 76 76 73 73 77 74 66 58 52 50 78 74 67 58 53 51 82 78 72 64 57 54
2100 67 64 63 61 57 56 60 58 53 46 39 35 64 61 59 51 45 41 71 68 68 63 58 56
2600 70 67 68 65 62 61 63 61 55 48 42 37 67 64 62 53 47 44 73 71 69 66 60 57
3100 72 70 71 69 66 65 68 65 58 52 46 40 70 66 65 56 50 46 78 74 70 68 62 60
3600 74 73 73 72 70 69 73 69 61 56 49 42 74 70 67 59 52 50 80 76 72 71 65 64
4100 77 76 76 76 73 73 76 72 64 58 51 44 77 73 68 61 55 53 83 79 74 74 68 67
4600 80 79 78 79 76 76 79 77 66 61 54 46 81 77 70 64 59 58 86 81 76 75 70 69
RADIATED
OCTAVE BAND NUMBER
0.5" INLET
ΔΔ
Ps
OCTAVE BAND NUMBER
3.0" INLET
ΔΔ
Ps
1.0" INLET
ΔΔ
Ps
OCTAVE BAND NUMBER
CFM
UNIT
SIZE
OCTAVE BAND NUMBER
DISCHARGE
FAN ONLY
1630
1430
1230
1424
1224
1421
1221
1844
1644
1640
1440
NOTES:
• Data obtained from tests conducted in accordance with ARI Standard 880.
• Sound levels are expressed in decibels, dB re: 1 x 10-12 Watts.
• Fan external static pressure is 0.25 inches w.g.
Shaded Unit Sizes (i.e. 1221, 1430, 1640) indicate the most commonly specified selections.

CFR • FAN PERFORMANCE, PSC MOTOR
16 CFR Catalog • ©December, 2005 Environmental Technologies, Inc.
General Fan Note
The fan curves depicted on this page are for PSC
type motors. Each fan curve depicts the actual per-
formance for the relative motor tap without any
additional fan balance adjustment. Actual specified
capacities which fall below a particular fan curve (LOW,
MED or HI) can be obtained by adjustment of the
electronic fan speed controller. Selections should
only be made in the non-shaded areas. The mini-
mum external static pressure requirement is shown
for each fan assembly. The unit fan should not be
energized prior to realizing this minimum external
static pressure.
NOTE:
Terminals equipped with a hot water heating coil
require the addition of the coil pressure drop to the
specified external static pressure before making the
fan selection.
UNIT SIZES 0506, 0606, 0806
UNIT SIZES 0611, 0811, 1011
E.S.P.
(IN. W.G.)
E.S.P.
(IN. W.G.)
Airflow/CFM (Standard Density Air)
Airflow/CFM (Standard Density Air)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
200 250 300 350 400 450 500 550 600 650 700
HI
TAP
MED
TAP
LOW
TAP
UNIT SIZES 0404, 0504, 0604
E.S.P.
(IN. W.G.)
Airflow/CFM (Standard Density Air)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
100 150 200 250 300 350 400 450
HI TAP
MED TAP
LOW TAP
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
400 500 600 700 800 900 1000 1100 1200 1300
HI TAP
MED TAP
LOW TAP

FAN PERFORMANCE, PSC MOTOR • CFR
©December, 2005 Environmental Technologies, Inc. • CFR Catalog 17
Airflow/CFM (Standard Density Air)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 3400
HI
TAP
MED
TAP
LOW
TAP
UNIT SIZES 1230, 1430, 1630
E.S.P.
(IN. W.G.)
Airflow/CFM (Standard Density Air)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1000 1200 1400 1600 1800 2000 2200 2400 2600
HI TAP
MED TAP
LOW TAP
UNIT SIZES 1224, 1424
E.S.P.
(IN. W.G.)
Airflow/CFM (Standard Density Air)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
2400 2600 2800 3000 3200 3400 3600 3800 4000 4200 4400 4600 4800
HI TAP
MED TAP
LOW TAP
UNIT SIZES 1644, 1844
E.S.P.
(IN. W.G.)
Airflow/CFM (Standard Density Air)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 3800 4000 4200
HI
TAP
MED
TAP
LOW
TAP
UNIT SIZES 1440, 1640
E.S.P.
(IN. W.G.)
Airflow/CFM (Standard Density Air)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
900 1100 1300 1500 1700 1900 2100 2300
HI TAP
MED TAP
LOW TAP
UNIT SIZES 1021, 1221, 1421
E.S.P.
(IN. W.G.)
Airflow/CFM (Standard Density Air)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
HI
TAP
MED
TAP
LOW
TAP
UNIT SIZES 0818, 1018, 1218
E.S.P.
(IN. W.G.)

CFR • ECM™ FAN MOTOR OPTION
18 CFR Catalog • ©December, 2005 Environmental Technologies, Inc.
ENVIRO-TEC®offers an alternative to the PSC motor
that significantly increases the operating efficiency of
fan terminal units. This motor is frequently referred to
as an ECM™ (electronically commutated motor). It is a
brushless DC (BLDC) motor utilizing a permanent mag-
net rotor. The motor has been in production for years
and is commonly used in residential HVAC units. Fan speed
control is accomplished through a microprocessor based
variable speed controller (inverter) integral to the motor.
The motor provides peak efficiency ratings between 70
& 80% for most applications.
ECM™ FEATURES AND BENEFITS
Ultra-High Motor & Controller Energy Efficiency
DC motors are significantly more efficient than AC
motors. At full load the ECM™ is typically 20% more effi-
cient than a standard induction motor. Due to acoustical
considerations, the fan motor on a fan powered termi-
nal typically operates considerably less than full load. At
this condition the overall motor / controller (SCR) efficiency
can be cut in half. Due to the permanent magnet, DC
design, the ECM™ maintains a high efficiency at low speeds.
Most fan powered unit selections will have an overall effi-
ciency greater than 75%. Furthermore, the motor heat
gain is greatly reduced providing additional energy sav-
ings by reducing the cold primary air requirement.
Pressure Independent Fan Volume
The integral microprocessor based controller includes a
feature that provides sensorless (no external feedback) con-
stant airflow operation by automatically adjusting the speed
and torque in response to system pressure changes. This
breakthrough will no doubt have far reaching
benefits and endless applications. For starters, the fan
volume supplied to the space will not significantly change
as a filter becomes loaded. This provides new opportu-
nities for medical applications where space pressurization
and HEPA filters are applied. The air balance process will
become simpler and more accurate since the fan volume
will not need to be re-adjusted after the diffuser balance
is accomplished.
Factory Calibrated Fan Volume
Due to the pressure independent feature, the fan
capacity can now be calibrated at the factory. Within the
published external pressure limits, the fan motor will
automatically adjust to account for the varying static
pressure requirements associated with different
downstream duct configurations. This feature should not
preclude the final field air balance verification process
during the commissioning stage of a project. An
electronic (PWM) speed control device is provided to allow
field changes of the fan capacity as the need arises. Fan
volume can be field calibrated in two fashions. First, a
potentiometer is provided allowing manual adjustment
using an instrument type screwdriver. In addition, the
fan volume can be calibrated through the BMS using an
analog output (2 to 10VDC typical) to the speed
controller. A fan volume verses DC volts calibration chart
is provided.
Designer / Owner Flexibility
The ECM™ incorporates ball bearings in lieu of sleeve
bearings typically utilized with an induction
motor. Unlike a sleeve bearing
motor, the ECM™ does not have
a minimum RPM requirement for
bearing lubrication. This allows
it to operate over a much
wider speed range. One
motor can handle the
capacity range previ-
ously handled by two
motors, allowing sim-
plification of the
product line and con-
siderable flexibility to the
designer. The owner also
benefits since equipment
changes are much less likely with tenant requirement
changes. A reduced spare parts inventory is another plus.
Custom Applications —
Programmable Fan Operation
Boundless control opportunities arise due to the con-
trollability of a DC motor combined with an integral
microprocessor. Various input signals can direct the motor
to behave in an application specific mode. For instance,
multiple discrete fan capacities can be achieved. In
addition, the fan speed can be varied in response to the
space temperature load. The fan can also be pro-
grammed for a soft start. The motor starts at a very low
speed and slowly ramps up to the required speed. This
is especially beneficial for parallel flow fan terminals since
the perceived change in space sound levels is lessened.
Extended Motor Life
The high motor efficiency provides a significantly reduced
operating temperature compared to an induction motor.
The lower temperature increases the longevity of all
electrical components and therefore the life of the motor.
The ball bearings do not require lubrication and do not
adversely impact the motor life. Most fan powered
applications will provide a motor life between 60,000 and
100,000 hours. A motor life of twenty five years will not
be uncommon for a series flow fan terminal and a longer
life can be expected for a parallel flow unit.
The Energy Efficient Solution

GENERAL SELECTION, ECM™ MOTOR • CFR
©December, 2005 Environmental Technologies, Inc. • CFR Catalog 19
DIS.
200 0.07 -- -- 20 28
300 0.15 -- -- 24 32
400 0.27 -- 24 28 35
500 0.40 -- 28 33 37
400 0.03 -- 20 24 33
500 0.05 -- 23 27 35
600 0.07 -- 27 31 37
800 0.11 22 32 35 40
900 0.14 25 35 37 41
600 0.03 -- 26 30 37
800 0.06 22 33 36 41
900 0.08 25 35 38 43
600 0.11 -- 27 30 36
800 0.19 -- 31 32 39
1000 0.30 23 35 36 42
600 0.02 -- 26 28 38
800 0.04 -- 27 31 39
1000 0.06 23 30 33 40
1200 0.08 27 33 36 43
1400 0.11 30 38 40 46
1500 0.14 31 39 41 47
800 0.02 -- 30 32 40
1000 0.03 23 32 36 41
1200 0.05 26 36 39 43
1400 0.06 30 39 41 46
1500 0.07 31 40 43 48
600 0.04 -- 20 24 35
800 0.06 -- 26 31 38
1000 0.10 -- 30 33 40
1200 0.13 24 35 38 43
1400 0.18 26 38 40 46
1600 0.24 29 40 42 48
600 0.01 -- 20 24 35
800 0.02 -- 24 28 40
1100 0.04 21 30 33 41
1400 0.06 26 36 38 45
1700 0.09 31 40 41 48
2000 0.13 35 43 46 51
600 0.01 -- 20 24 35
800 0.02 -- 24 28 40
1100 0.04 21 32 36 40
1400 0.06 26 38 41 46
1700 0.09 31 42 45 50
2000 0.13 35 46 47 52
1400 0.06 26 37 40 46
1700 0.09 29 39 42 48
2000 0.12 32 43 46 52
2300 0.17 35 48 48 55
1400 0.04 26 37 40 46
1700 0.08 29 39 42 48
2000 0.11 32 43 46 52
2350 0.12 35 48 48 55
1600 0.06 -- 26 28 37
2100 0.10 22 31 33 41
2600 0.14 27 36 37 45
3100 0.20 31 41 42 47
1600 0.04 -- 27 31 38
2100 0.07 22 31 33 41
2600 0.11 27 35 38 43
3100 0.15 31 41 42 47
3400 0.19 33 43 44 49
277
13.3
6.9
277
120
15.4
N/A
14.2
8.2
N/A
10.9
5.5
277
1205
9.6
N/A
7.2
4.1
277
120
7.7
0611
0811
1421
3/4
3-PHASE4
NEUTRAL
AMPS
120
277
5.0
2.6
5.4
N/A
VOLTS
FLA3
MIN
xx Ps1
(IN W.G.)
PROJECTED ROOM NOISE CRITERION (NC)2
FAN
ONLY
RADIATED
0.5" INLET
XXPs
UNIT
SIZE
CFM
1440
1640
1021
1221
1011
0818
1018
1218
2
@
1/2
1.0" INLET
XXPs
3.0" INLET
XXPs
FAN
HP
1/2
1/3
12.8
N/A
1224
1424
1
1205
Most variable speed electronic devices,
including the ECM™ operate with a rec-
tified and filtered AC power. As a
result of the power conditioning, the
input current draw is not sinusoidal;
rather, the current is drawn in pulses at
the peaks of the AC voltage. This pul-
sating current includes high frequency
components called harmonics.
Harmonic currents circulate on the
delta side of a Delta-Wye distribution
transformer. On the Wye side of the
transformer, these harmonic currents are
additive on the neutral conductor. A
transformer used in this type of appli-
cation must be sized to carry the output
KVA that will include the KVA due to cir-
culating currents.
Careful design must be provided when
connecting single-phase products to
three-phase systems to avoid potential
problems such as overheating of neu-
tral wiring conductors, connectors, and
transformers. In addition, design con-
sideration must be provided to address
the degradation of power quality by the
creation of wave shape distortion.
In summary, proper consideration must
be given to the power distribution
transformer selection and ground neu-
tral conductor design to accommodate
the 3-phase neutral AMPs shown in the
adjacent table. Specific guidelines are
available from the factory.
234567
Type 2 - Mineral Fiber Ceiling 18 19 20 26 31 36
OCTAVE BAND
RADIATED
ATTENUATION VALUES
234567
Small Box (< 300 CFM) 24 28 39 53 59 40
Medium Box (300-700 CFM) 27 29 40 51 53 39
Large Box (> 700 CFM) 29 30 41 51 52 39
OCTAVE BAND
DISCHARGE
ATTENUATION VALUES
NOTES:
1. Min. ΔPs is the static pressure difference across the primary air valve with the damper
wide open. All downstream losses (including optional hot water coil) are handled
by the unit fan and need not be considered for primary air performance calcula-
tions. Data is certified in accordance with the ARI 880 certification program.
2. NC values calculated based upon the 2002 Addendum to ARI Standard 885
Appendix E Typical Sound Attenuation Values (shown at right).
3. Calculate wire feeder size and maximum overcurrent protective device per NEC and
local code requirements. Recommended fuse type shall be UL Class RK5, J, CC or
other motor rated fuse.
4. Neutral harmonic current contribution for each 3-phase balanced load of motors
at full speed.
5. Includes factory provided 2mH choke for power factor correction.

CFR • FAN PERFORMANCE, ECM™ MOTOR
20 CFR Catalog • ©December, 2005 Environmental Technologies, Inc.
UNIT SIZES 1021, 1221, 1421
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
600 800 1000 1200 1400 1600 1800 2000
AIRFLOW / CFM (Standard Density Air)
E.S.P.
(IN W.G.)
UNIT SIZES 1440, 1640
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1500 1700 1900 2100 2300 2500 2700 2900 3100 3300 3500
AIRFLOW / CFM (Standard Density Air)
E.S.P.
(IN W.G.)
General Fan Note
The fan curves depicted on this page are for ECM™
type motors. Actual specified capacities which fall
below the fan curve can be obtained by adjustment
of the fan speed controller. Selections should only
be made in the non-shaded areas. The minimum
external static pressure requirement is shown for each
fan assembly. The unit fan should not be energized
prior to realizing this minimum external static pres-
sure.
Terminals equipped with a hot water heating coil
require the addition of the coil pressure drop to the
specified external static pressure before making the
fan selection.
UNIT SIZES 0611, 0811, 1011
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
150 300 450 600 750 900
AIRFLOW / CFM (Standard Density Air)
E.S.P.
(IN. W.G.)
UNIT SIZES 0818, 1018, 1218
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
500 600 700 800 900 1000 1100 1200 1300 1400 1500
AIRFLOW / CFM (Standard Density Air)
E.S.P.
(IN W.G.)
UNIT SIZES 1224, 1424
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1400 1600 1800 2000 2200 2400
AIRFLOW / CFM (Standard Density Air)
E.S.P.
(IN. W.G.)