| Item | Ceiling/Roof Backdraft Dampers |
| Type | Roof Mount, Exhaust |
| Damper Size (In.) | 27 X 27 |
| Overall Size (In.) | 29 x 29 |
| Outside Flange (In.) | 29 x 29 |
| Flange Width (In.) | 1 in |
| Construction Material | Aluminum Blades, G-90 Galvanized Steel Frame, Nylon Bushings and Galvanized Steel Tie Rods., Stainless Steel Pivot Pins |
| Max. Velocity (FPM) | 2,250 fpm |
| Use w/Dayton Ventilators | 4HX87, 4HX98, 4YC52, 4YC53, 4YC54, 4YC55 |
| Includes | Pre-Punched Conduit Hole Knock-Out, Felted Edges for Quiet Operation |
| Overall Length | 4 1/2 in |
| Overall Height | 29 in |
| Overall Width | 29 in |
| Blade | Aluminum Blade w/ Felt Seal |
| Rough Opening Dims | 26 1/2 in x 27.5 in |
| Flange Width | 1 in |
| Rough Opening Shape | Square |
| Rough Opening Width | 27.5 in |
| For Fuel Type | Not Applicable |
| Overall Diameter | Not Applicable |
| Rough Opening Length | 26 1/2 in |
| Damper Type | Static |
| Pressure Drop @ 1000 fpm (AMCA 5.2) | Not Applicable |
| Closure Type | Gravity |
| Blade Type | Flat Blade |
| Frame Less Flange | 27 |
| Bushing Material | Nylon |
| Seal Material | Not Applicable |
| Maximum Pressure | 1 in wc |
| Counterbalanced | Yes |
| Switch Action | Normally Closed |
| Single Acting/Double Acting | Single Acting |
| Fusible Link Temperature | Not Applicable |
| Rough Opening Diameter | 27 1/2 in |
| Mounting Position | Horizontal |
| Frame Material Thickness | 20 ga |
| For Nominal Duct Diameter | Not Applicable |
| Maximum Ambient Temperature | 180 Degrees F |
| Damper Application | Backdraft |
| Maximum Air Velocity | 2250 fpm |
| Number of Panels | 1 |
| Blade Seal Material | Felt |
| Flange Type | Rear Flange |
| Airflow Direction | Vertical |
| Frame Depth | 2 in |
| ACMA Leakage Class | Not Applicable |
| Blade Material | Aluminum |
| Fits Fan Diameter | 24 in |
| Closure Velocity Rating | 2,250 fpm |
| Frame Material | Galvanized Steel |
| For Duct Shape | Square |
| Blade Orientation | Parallel Blades |
| Free Area | 4.1 sq ft |
| Country of Origin (subject to change) | United States |
| Package Quantity | 1 |
Damper, Roof Mount, DAYTON, Mfr# 4HX68
$95,99
-3% / ea
with subscription
Free shipping will be applied on orders over $50
29 In.H-W 4.5 In.L Aluminum Backdraft Damper, Damper Application Backdraft, For Nominal Duct Diameter Not Applicable, Frame Material Galvanized Steel, Number of Panels 1, Maximum Air Velocity 2250 fpm, Overall Height 29 in, Rough Opening Diameter 27 1/2 in, Rough Opening Shape Square, Fits Fan Diameter 24 in, For Duct Shape Square, Free Area 4.1 sq ft, Overall Width 29 in, Frame Material Thickness 20 ga, Overall Length 4 1/2 in, Frame Depth 2 in, Rough Opening Length 26 1/2 in
9999 in stock
Must order in multiples of 1
Subtotal:
$95.99
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