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Fan Diameter
Rough Opening Diameter
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| Type of Product | Backdraft Damper |
| Country of Origin | USA |
| Flange Width | 1 inch |
| Blade Material | Aluminum |
Type of Product |
Backdraft Damper |
Country of Origin |
USA |
Flange Width |
1 inch |
Blade Material |
Aluminum |
Maximum Ambient Temperature |
180°F |
Blade Type |
Flat Blade |
Mounting position |
Horizontal |
Flange Type |
Rear Flange |
Maximum Pressure |
25.4 mm wc |
Seal Material |
Felt |
Overall Length |
4-1/2 inch |
Mounting Location |
Ceiling |
Fan Diameter |
18 inch |
Free Area |
1.9² ft |
Overall Height |
21 Inch |
Part No |
4HX66 |
Rough Opening Width |
19.5 inch |
Overall Width |
21 inch |
Frame Material |
Galvanized Steel |
Item Code |
4HX66 |
Maximum Air Velocity |
2000 fpm |
For Duct Shape |
Square |
Rough Opening Length |
18-1/2 inch |
Action Type |
Normally Closed |
Damper Type |
Static |
Number of Panel |
1 |
Frame Depth |
2 inch |
Rough Opening Diameter |
19-1/2 inch |
Orientation |
Parallel Blades |
Shape |
Square |
UNSPSC Code |
40101504 |
Air Flow |
Vertical |
Overall Height (mm) |
533.4 mm |
Overall Length (cm) |
11.43 cm |
Overall Width (mm) |
533.4 mm |
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