Damper Selection Guide
Metric Version
Doors - Access & Pressure Relief
Air Measuring Dampers
Backdraft Dampers
Balancing Dampers
Ceiling Radiation Dampers
Combination Fire Smoke Dampers
Control Dampers
Fire Dampers
Smoke Dampers
Relief Dampers
Heavy-Duty/Industrial Dampers
Specialty Application HD Dampers
Bubble-Tight Dampers
Duct Heaters
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July 2025
Model
CAD HAD RAD
PRAD VRAD
Door Type
Cam Hinged Round
-
Pressure Relief
-
Positive Negative
Leakage Class
Door Maximum Size (mm)
-
610 x 610
Velocity Pressure
(FPM)
(kPa)
Access Doors
-
1.1
-
610 x 610
-
1.1
-
406 x 305
-
610 x 610
-
4.9
Relief Doors
-
0.5 - 3
-
610 x 610
-
0.5 -3
AMCA Listing
Submittal
Installation Instructions
CSI Specs
DWG Drawings
-
-
-
-
-
-
-
Model Blade Type
Blade Material
AMS
-
-
AMD-23 AMD-33 AMD-42
3V Airfoil Airfoil
Galvanized Steel
Galvanized Steel
Aluminum
AMD-42V Airfoil - Vertical Aluminum
Leakage Damper Class @ Maximum 0.25 kPa Size (mm)*
Velocity Range (m/s)
Pressure (kPa)
Air Measuring Station
AMCA Listing
-
1524 x 1829 1.5 - 15.2
-
-
Air Measuring - Pressure Differential
1A
3658 x 3759 1.5 - 10.2
1
Air Performance/ Air Leakage
1A
3048 x 3759 1.5 - 15.2
1
Air Performance/ Air Leakage
1A
3048 x 3759 1.5 - 15.2
1
-
Submittal
Installation Instructions
CSI Specs
DWG Drawings
1A
1880 x 1219 1.5 - 15.2
1
-
*Maximum size can be single or multiple sections.
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Model
Airflow Direction
Frame Blade Velocity Pressure Counter
Mounting
Material Material (m/s)
(kPa)
Balance Vertical Up
Vertical Down
Horizontal
Position
AMCA Listing
Commercial Backdraft
BD-100
Galv. Steel
Aluminum
7
.5
BD-300
Galv. Steel
Aluminum
7
.5
EM-1x Series Aluminum Aluminum 18
2.5
EM-3x Series Aluminum Aluminum 18
2.5
Air Horizontal Performance/
Air Leakage
Air
Vertical Performance/
Air Leakage
Air Horizontal Performance/
Air Leakage
Air
Vertical Performance/
Air Leakage
EM-4x Series Aluminum Aluminum 18
2.5
Horizontal
Submittal
Installation Instructions
-
CSI Specs
DWG Drawings
EMV-11 Aluminum Aluminum 18
2.5
GM-3x Series
Galv. Steel
Aluminum
18
2.5
WD-1xx Series
Galv. Steel
Aluminum
13
.25
WD-2xx Series
Galv. Steel
Aluminum
13
.25
WD-3xx Series
Galv. Steel
Aluminum
13
.5
WD-340
Galv. Steel
Aluminum
13
.5
WD-400, 420, 430
Galv. Steel
Aluminum
13
.5
WD-410
Galv. Steel
Aluminum
13
.5
Horizontal
Vertical
Horizontal
Horizontal, Vertical
Vertical
Vertical
Vertical
Horizontal
-
-
-
-
-
-
-
-
-
*Maximum size can be single or multiple sections.
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Model
WDR-53 SSWDR-53
HB-110 HB-120 HB-230 HB-240 HB-330
HBR-050 HBR-150
Frame Material
Galv. Steel
304SS
Galv. Steel Galv. Steel Galv. Steel Galv. Steel Galv. Steel
Galv. Steel Painted Steel
Blade Material
Aluminum 304SS
Aluminum Galv. Steel Galv. Steel Aluminum Galv. Steel
Galv. Steel Painted Steel
Velocity Pressure (m/s) (kPa)
10.2
.7
10.2
.7
19.8
1.2
26.2
2.1
26.2
3.4
26.2
3.4
32.5
5
15.2
1.5
20.3
1.5
Counter Balance
Airflow Direction
Vertical Up
Vertical Down
Horizontal
Angular Up
True Round Commercial Backdraft
Angular Down
Heavy-Duty/Industrial Backdraft
True Round Heavy-Duty/Industrial Backdraft
Mounting Position
Submittal
Horizontal, Vertical
Horizontal, Vertical
Horizontal, Vertical
Horizontal, Vertical
Horizontal, Vertical
Horizontal, Vertical
Horizontal, Vertical
Horizontal, Vertical
Horizontal, Vertical
Installation Instructions
-
CSI
DWG
Specs Drawings
*Maximum size can be single or multiple sections.
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Model
ABD ABD-RB ABD-T ABD-FD ABD-Z1 ABD-Z2
Blade Type
Thermoplastic Round
Thermoplastic Round
Thermoplastic Round
Thermoplastic Round/Curtain Thermoplastic
Round/Galv. Steel
Thermoplastic Round/Galv.
Steel
Damper Maximum Size (mm)
203 203 203 152
152
152
Velocity (m/s)
.201 m3/s .201 m3/s .201 m3/s .13 m3/s .13 m3/s
.13 m3/s
Pressure (kPa)
Operator
Automatic Balancing Dampers
.5
-
.5
-
.5
-
.5
-
.5
Actuator
.5
Actuator
Manual Balancing Dampers
Submittal
Installation Instructions
CSI Specs
DWG Drawings
-
MBD-10
Single Blade 914 x 305
10.2
.25
Manual Quadrant or Cable Operated
MBD-15
3V
2438 x 2438 10.2
1
Manual Quadrant or Cable Operated
MBDR-50
True Round
610
10.2
RBD-10
Single Blade 914 x 305
10.2
RBD-15
Multi-Blade
.37 sq. m
10.2
RBDR-50
True Round
610
10.2
BTDR-50
True Round
381
8.1
.25
Manual Quadrant or Cable Operated
Remote Balancing Dampers
.25
Remote Control with 9 Volt Actuator
1
Remote Control with 9 Volt Actuator
.25
Remote Control with 9 Volt Actuator
Bowtie Damper
.25
Cable Operated
-
*Maximum size can be single or multiple sections.
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Model
CRD-1 CRD-1WJ CRD-1WT
CRD-2 CRD-2WT CRD-60
CRD-501
Blade Type
Butterfly Butterfly Butterfly Round Butterfly Butterfly Curtain
True Round
Fire Resistance Rating*
3 Hour
Leakage Class
Damper Maximum Size (mm)
Roof/Floor Assembly
Wood Truss Assembly
Wood Joist Assembly
Ceiling Radiation Dampers
Submittal
Installation Instructions
CSI Specs
DWG Drawings
-
610 x 610
-
-
1 Hour (UL Wood Joist)
-
1 Hour (UL Wood Truss)
-
-
-
406 x 305
-
533 x 457
-
3 Hour
-
1 Hour (UL Wood Truss)
-
610
-
-
-
305 x 305
-
3 Hour 3 Hour
-
610 x 610
-
-
Ceiling Radiation Dampers Leakage Rated
I
305
-
-
* Fire rated floor/ceiling assemblies.
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Model
Blade Type
Fire Resistance
Rating
Leakage Class
Damper Maximum Size
(mm)*
Velocity Pressure
(m/s)
(kPa)
Horizontal Vertical
Corridor Fire Smoke
AMCA Listing
Submittal
Installation Instructions
CSI Specs
Drawings DWG Revit
CFSD-211
3V 1 hour corridor
I
601 x 610 610 x 610 10.2
1
Air Performance
-
FSD-211
3V
11/2 hour
Traditional Combination Fire Smoke
I
3658 x 2438 3251 x 2540 10.2
1.5
Air Performance
FSD-212
3V
11/2 hour
II
3658 x 2438 3251 x 2540 10.2
1.5
Air Performance
FSD-213
3V
11/2 hour
III
3658 x 2438 3251 x 2540 10.2
1.5
Air Performance
FSD-311
Airfoil
11/2 hour
I
3658 x 2438 3251 x 2540 20.3
2
Air Performance
FSD-312
Airfoil
11/2 hour
II
3658 x 2438 3251 x 2540 20.3
2
Air Performance
FSD-331
Airfoil
3 hour
I
3048 x 2438 3048 x 2438 20.3
2
Air Performance
SEFSD-211
3V
FSD-211M
3V
11/2 hour 11/2 hour
I
1219 x 762 2235 x 1829 10.2
1.5
Air Performance
Modulating Fire Smoke
I
1829 x 1829 1829 x 1829 10.2
1
Air Performance
FSD-311M
Airfoil
11/2 hour
FSD-311V
Airfoil
11/2 hour
GFSD-211
3V
11/2 hour
I
3251 x 2438 3251 x 2540 15.2
1
Air Performance
Vertical Blade Fire Smoke
I
-
2540 x 813 20.3
1
-
Out of Wall Fire Smoke
I
1219 x 1219 1219 x 1219 10.2
1
-
OFSD-211
3V
11/2 hour
I
914 x 914 914 x 914 10.2
1.5
Air Performance
OFSD-212
3V
11/2 hour
II
914 x 914 914 x 914 10.2
1.5
Air Performance
OFSD-311
Airfoil
11/2 hour
I
FSDR-511
True Round
11/2 hour
I
SSFSDR-511
True Round
11/2 hour
I
*Maximum size can be single or multiple sections.
813 x 762 610
813 x 762 20.3
2
Air Performance
True Round Fire Smoke
610
20.3
1
-
610
610
20.3
1
-
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Model
VCD-20 VCD-23 VCD-33 VCD-34 VCD-40
Blade Type
3V 3V Airfoil Insulated Airfoil Airfoil
Damper Maximum Size (mm)
Velocity (m/s)
Pressure (kPa)
Leakage Class
@ .25 kPa
AMCA Listing
Commercial Control
Unlimited
15.2
1.2
-
Air Performance
Unlimited
15.2
1.2
Unlimited
20.3
2
Unlimited
20.3
2
1A
Air Performance Air Leakage
1A
Air Performance Air Leakage
1A
Air Performance Air Leakage
Unlimited
30.5
1.5
1A
Air Performance
Submittal
Installation Instructions
CSI Specs
Drawings
DWG
Revit
VCD-42
Extruded Airfoil Unlimited
30.5
1.5
VCD-43
Extruded Airfoil Unlimited
30.5
2
SEVCD-23
3V
Unlimited
15.2
1.2
SEVCD-33
Airfoil
Unlimited
20.3
2
FBV-23
3V
2438 x 1880 15.2
1.2
VCD-23V
3V
3759 x 2438 15.2
1.2
VCD-33V
Airfoil
3759 x 3048 20.3
2
VCD-34V Insulated Airfoil 3759 x 3048 20.3
2
VCD-43V Extruded Airfoil 3962 x 3048 30.5
2
1A
-
1A
Air Performance Air Leakage
1A
Air Performance Air Leakage
1A
Air Performance Air Leakage
Face & Bypass Control
1A
-
Vertical Blade Control
1A
-
1A
-
1A
-
1A
-
Control Dampers continued on next page....
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Model ICD-44 ICD-45 VCDR-50
Blade Type
Extruded Aluminum Thermally Broken Blade
Extruded Aluminum Thermally Broken Blade and Frame
Damper Maximum Size (mm)
4572 x 3962
4572 x 3962
Velocity (m/s)
20.3 20.3
Pressure (kPa)
Leakage Class
@ .25 kPa
AMCA Listing
Insulated Thermally Broken Control
2
1A
Air Performance/ Air Leakage/ Efficiency
2
1A
Air Performance/ Air Leakage/ Efficiency
True Round Control
True Round
610
15.2
1
-
-
VCDR-53
True Round
610
VCDRM-53 Single Thickness
1219
15.2
1
1
-
True Round Multiblade Control Dampers
12.7
1.2
1
-
Submittal
Installation Instructions
CSI Specs
Drawings
DWG
Revit
-
-
-
*Maximum size can be single or multiple sections.
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Model
Blade Type
Damper Maximum Size
(mm)
HCD-120
3V
HCD-130
Airfoil
HCD-130-LE
Airfoil
HCD-135 Insulated Airfoil
HCD-220 HCD-221 HCD-230
3V
Flat Dual Skin w/ Perimeter Seal
Airfoil
HCD-230-LE
Airfoil
HCD-240 Extruded Airfoil
HCD-330
Airfoil
HCD-430
Airfoil
HCD-530
Airfoil
2438 x 2438 3048 x 2438 1448 x 1448 3048 x 2438 2438 x 2438 2438 x 1524 3048 x 2438 1981 x 1927 3048 x 2438 3048 x 2438 3048 x 2438 3048 x 2438
HCDR-050 HCDR-150 HCDR-152 HCDR-250 HCDR-350 HCDR-351 HCDR-450
True Round True Round Two-Blade True Round True Round True Round True Round
609 1219 1219 1829 1829 1219 1524
Velocity (m/s)
Pressure (kPa))
Maximum Temperature
Submittal
Installation Instructions
Heavy-Duty Industrial Control Dampers
15.2
2.1
204°C
CSI Specs
20.3
2.1
204°C
20.3
2.1
121°C
20.3
2.1
121°C
20.3
3.7
315°C
20.3
2.5
204°C
25.4
3.7
315°C
25.4
3.7
121°C
25.4
3.7
250°C
25.4
6.2
315°C
30.5
8.7
315°C
30.5
11.2
315°C
Heavy-Duty/Industrial Round Control Dampers
15.2
1.5
121°C
20.3
1.5
204°C
20.3
1.5
204°C
26.5
3.4
315°C
32.5
5
538°C
33
5
204°F
36
7
204°F
Drawings
DWG
Revit
-
-
*Maximum size can be single or multiple sections.
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Model DFD-210
Blade Type
Fire Resistance
Rating
Closure Rating
Damper Maximum Size (mm)*
Horizontal Vertical
Velocity Pressure
(m/s)
(kPa)
Multiblade Fire
Submittal
Installation Instructions
3V
11/2 hour Dynamic 3251 x 2438 3251 x 2540 20.3
2.5
CSI Specs
DFDAF-310 Airfoil 11/2 hour Dynamic 3658 x 2438 3251 x 2540 20.3
2
DFDAF-330 Airfoil
3 hour
Dynamic 3658 x 2438 3048 x 2438 20.3
2
SEDFD-210 3V ODFD-150 Curtain
11/2 hour 11/2 hour
Dynamic 1219 x 762 Dynamic 762 x x762
1219 x 762
20.3
2.5
Out of Wall Fire
914 x 914
20.3
1
OFD-150 Curtain
DFDR-510 SSDFDR-510
True Round
True Round
DFD-110 DFD-150 DFD-310
Curtain Curtain Curtain
11/2 hour
11/2 hour 11/2 hour
11/2 hour 11/2 hour 3 hour
Static
914 x 914
Dynamic
610
914 x 914
-
-
True Round Fire
610
10.2
1
Dynamic
Dynamic Dynamic Dynamic
610
610
10.2
1
1219 x 914 1219 x 914 1219 x 914
Traditional Curtain Fire
1829 x 1219 or 1524 x 1524
20.3
1
1829 x 1219 or 1524 x 1524
20.3
1
1219 x 1219 20.3
1
DFD-350 Curtain 3 hour
Dynamic 1219 x 914 1219 x 1219 20.3
1
Drawings
DWG
Revit
-
-
-
Fire Dampers cont...
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Model
FD-110 FD-150 FD-310
Blade Type
Fire Resistance
Rating
Closure Rating
Damper Maximum Size (mm)*
Horizontal Vertical
Velocity Pressure
(m/s)
(kPa)
Traditional Curtain Fire continued...
Submittal
Installation Instructions
Curtain 11/2 hour
Static 2438 x 1219 2438 x 1219
-
-
Curtain 11/2 hour
Static
2438 x 1219 or 120 x 40
2438 x 1219 or 3048 x 1016 or
1880 x 1880
-
-
Curtain 3 hour
Static
-
1219 x 1219
-
-
CSI Specs
DWG Drawings
FD-350 Curtain 3 hour
Static 2032 x 1016 1219 x 1219
-
-
SSDFD-150 Curtain 11/2 hour Dynamic
-
762 x 762
10.2
1
SSDFD-350 Curtain SSFD-150 Curtain SSFD-350 Curtain
DFD-150X12 Curtain
3 hour 11/2 hour 3 hour
11/2 hour
Dynamic Static Static
Dynamic
-
762 x 762
10.2
1
914 x 914
2438 x 1219 or 3048 x 1016
-
-
-
1219 x 1219
-
-
Curtain Fire - Integral Sleeve
762 x 762
914 x 914
20.3
1
DFD-150X16 Curtain
11/2 hour
Dynamic
762 x 762
914 x 914
20.3
1
FD-150X12 Curtain
11/2 hour
Static 1219 x 1219 1219 x 1219
-
-
FD-150X16 Curtain
11/2 hour
Static 1219 x 1219 1219 x 1219
-
-
*Maximum size can be single or multiple sections.
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Model
SMD-201 SMD-201M SMD-202 SMD-301
Blade Type
Leakage Class
Damper Maximum Size (mm)*
Horizontal
Vertical
Velocity (m/s)
Pressure (kPa)
AMCA Listing
Submittal
Installation Instructions
Traditional Smoke
3V
I
3251 x 2540 or 3251 x 2540 or
3658 x 2438
3658 x 2438
10.2
1.5 Air Performance
3V
I
1829 x 1829
1829 x 1829
10.2
1
Air Performance
3V
II
3251 x 2540 or 3251 x 2540 or
3658 x 2438
3658 x 2438
10.2
1.5 Air Performance
Airfoil
I
4877 x 2540
4877 x 2540
20.3
2
Air Performance
CSI Specs
SMD-301M
Airfoil
I
3251 x 2540
3251 x 2540
10.2
1
Air Performance
SMD-302
Airfoil
II
SMD-401
Extruded Airfoil
I
SMD-401EF
Extruded Airfoil
I
SMD-401M
Extruded Airfoil
I
SESMD-201
3V
I
SMD-301V
Airfoil
I
SMDR-501 True Round
I
4877 x 2540 4877 x 3048 4877 x 3048 914 x 1829 1219 x 762
-
610
4877 x 2540
20.3
2
Air Performance
4877 x 3048
15.2
1.5
-
4877 x 3048
15.2
1.5 Air Performance
914 x 1829
10.2
1
-
2235 x 1829 2540 x 813
610
10.2
1.5 Air Performance
Vertical Blade Smoke
20.3
2
-
True Round Smoke
20.3
1
-
SSSMDR-501 True Round
I
610
610
20.3
1
-
Drawings DWG Revit
-
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Model
BR-1x Series
BR-3x Series BR-4x Series
SEBR-1x Series
SEBR-3x Series
SEBR-4x Series
HPR-120 HPR-230 HPR-330
Frame Blade Counter Material Material Balance
Galv. Steel
Aluminum
Galv. Steel
Aluminum
Galv. Steel
Aluminum
316SS 316SS
316SS 316SS
316SS 316SS
Galv. Steel
Galv. Steel
Galv. Steel
Galv. Steel
Galv. Steel
Galv. Steel
Velocity (m/s)
10.2 10.2 10.2 10.2 10.2 10.2
26.2 26.2 32.5
Back Pressure
(kPa)
Airflow Direction Vertical Up Vertical Down Horizontal
Mounting Position
Submittal
Installation Instructions
Barometric Relief
0.5
Horizontal
0.5
Vertical
0.5
Horizontal
0.5
Horizontal
0.5
Vertical
0.5
Heavy-Duty/Industrial Pressure Relief
2.1
3.4
5
Horizontal
Horizontal, Vertical
Horizontal, Vertical
Horizontal, Vertical
CSI Specs
DWG Drawings
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Model
Blade Type
Damper Maximum Size
(mm)
HCD-120
3V
HCD-130
Airfoil
HCD-130-LE
Airfoil
HCD-135 Insulated Airfoil
HCD-220 HCD-221 HCD-230
3V
Flat Dual Skin w/ Perimeter Seal
Airfoil
HCD-230-LE
Airfoil
HCD-240 Extruded Airfoil
HCD-330
Airfoil
HCD-430
Airfoil
HCD-530
Airfoil
2438 x 2438 3048 x 2438 1448 x 1448 3048 x 2438 2438 x 2438 2438 x 1524 3048 x 2438 1981 x 1927 3048 x 2438 3048 x 2438 3048 x 2438 3048 x 2438
HCDR-050 HCDR-150 HCDR-152 HCDR-250 HCDR-350 HCDR-351 HCDR-450
True Round True Round Two-Blade True Round True Round True Round True Round
609 1219 1219 1829 1829 1219 1524
Velocity (m/s)
Pressure (kPa)
Maximum Temperature
Submittal
Installation Instructions
Heavy-Duty Industrial Control Dampers
15.2
2.1
204°C
CSI Specs
Drawings
DWG
Revit
20.3
2.1
204°C
20.3
2.1
121°C
-
20.3
2.1
121°C
-
20.3
3.7
315°C
-
20.3
2.5
204°C
-
25.4
3.7
315°C
-
25.4
3.7
121°C
-
25.4
3.7
250°F
-
25.4
6.2
315°C
-
30.5
8.7
315°C
-
30.5
11.2
315°C
-
Heavy-Duty/Industrial Round Control Dampers
15.2
1.5
121°C
-
20.3
1.5
204°C
-
20.3
1.5
204°C
-
26.5
3.4
315°C
-
32.5
5
538°C
-
33
5
204°C
-
36
7
204°C
Heavy-Duty Dampers continued on next page...
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Model
Frame Blade Material Material
Counter Balance
Velocity (m/s)
HPR-120 Galv. Steel Galv. Steel
26.2
HPR-230 Galv. Steel Galv. Steel
26.2
HPR-330 Galv. Steel Galv. Steel
32.5
Back Pressure
(kPa)
Airflow Direction
Vertical Up
Vertical Down
Horizontal
Heavy-Duty/Industrial Pressure Relief
2.1
3.4
5
Mounting Position
Horizontal, Vertical
Horizontal, Vertical
Horizontal, Vertical
Submittal
Installation CSI
DWG
Instructions Specs Drawings
Model
HB-110 HB-120 HB-230 HB-240 HB-330
HBR-050 HBR-150
Frame Material
Blade Velocity Pressure Material (m/s) (kPa)
Galv. Steel Aluminum
19.8
1.2
Galv. Steel Galv. Steel
26.2
2.1
Galv. Steel Galv. Steel
26.2
3.4
Galv. Steel Aluminum
26.2
3.4
Galv. Steel Galv. Steel
32.5
5
Galv. Steel Galv. Steel
15.2
1.5
Painted Steel Painted Steel 20.3
1.5
Vertical Up
Airflow Direction
Vertical Down
Horizontal
Angular Up
Angular Down
Mounting Position
Heavy-Duty/Industrial Backdraft
Horizontal, Vertical
Horizontal, Vertical
Horizontal, Vertical
Horizontal, Vertical
Horizontal, Vertical
True Round Heavy-Duty/Industrial Backdraft
Horizontal, Vertical
Horizontal, Vertical
Submittal
Installation CSI Instructions Specs
DWG Drawings
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Model
Damper Maximum Size (mm)
Velocity (m/s)
HBS-330
1956 x 2438
20.3
HBS-430
914 x 1219
20.3
HTOD-330
1219 x 1524
20.3
Pressure (kPa)
7 - 40
Maximum Temperature Blast Damper
121°C
Submittal
7-103 20.7
121°C Tornado Damper
121°C
Installation Instructions
CSI Specs
DWG Drawings
Model
HBTR-151 HBTR-451 HBTR-551
HBT-221 HBT-321
Blade Type
True Round True Round True Round
Rectangular Rectangular
Velocity (m/s)
19.8 33 33
20.3 20.3
Pressure (kPa)
2.4 7.5 10
2.5 5
Maximum Temperature
Submittal
Installation Instructions
True Round Bubble-Tight Damper
121°C
121°C 121°C
Rectangular Bubble-Tight Damper 121°C
121°C
CSI Specs
Drawings
DWG
Revit
-
-
Model
IDHB IDHE IDHE-O
Type
Heater Max Max Size (mm) Capacity
Basic
Universal Universal -
Outdoor
914 x 914 or 889 x 864
3048 x 3658
39.9 kW 478.8 kW
3048 x 1473 478.8 kW
Airflow Direction
Horizontal, Vertical Up Universal
Universal
Submittal Duct Heaters
Installation Instructions
CSI Specs
Drawings
DWG
Revit
-
-
*Maximum size can be single or multiple sections.
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Adobe PDF Library 17.0 Adobe InDesign 20.3 (Windows)
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