We are closed from Monday, Dec 23rd and will reopen on Monday, Jan 6th. Any orders received during this time will be processed in the New Year.
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Get it by Tuesday, Dec 31
Payment Methods
Delivery Partners
Step 1 Add the items into your cart or submit a Purchase order
Step 2 Checkout, select NET30 payment (provide company registration and VAT number)
Step 3 Delivery via TNT or Royal Mail and receive invoice for payment in 30-days
Step 4 Make payment via BACS to our factoring partner,
| Item | Backdraft Damper |
| Damper Size (in.) | 39 x 39 |
| Flange Width | 1" |
| Material | G-90 Galvanized Steel Frame, Aluminum Blades, Stainless Steel Pivot Pins, Nylon Bushings and Galvanized Steel Tie Rods. |
| Max. Velocity | 2250 fpm |
| Overall Size | 41 x 41 In. |
| Type | Roof Mount, Exhaust |
| Use W/dayton Ventilators | 4HX89, 4HZ01 |
| Ship weight (kg) | 8.55 |
| Ship height (cm) | 104.14 |
| Ship length (cm) | 11.43 |
| Ship width (cm) | 104.14 |
| HS code | 8414901080 |
| Country of Origin | US |
Contact your account manager right away to get personal advice.
We're available Monday through Friday, from 07:30 until 17:00.
Trade pricing is available for 
Order Value should be £500+