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 Monday, Jan 6
£19.99 Flat Shipping + VAT £19.99 flat shipping is applicable on orders with an aggregate weight less than 10kg. Orders exceeding 10kg will be charged default shipping rates
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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.) | 13 x 13 |
| Flange Width | 1.375" |
| Material | 16-gauge Extruded Aluminum Frame, Aluminum Blades, Galvanized Steel Tie Rods and Stainless Steel Hardware |
| Max. Velocity | 2000 fpm |
| Overall Size | 15-3/4 x 15-3/4 In. |
| Type | Wall Mount, Supply |
| Use W/dayton Ventilators | 4HZ50, 4HZ51 |
| Ship weight (kg) | 1.44 |
| Ship height (cm) | 40.01 |
| Ship length (cm) | 11.43 |
| Ship width (cm) | 40.01 |
| HS code | 8414901080 |
| Country of Origin | US |
| Product | Model | Flange Width | Frame Material | Material | Max. Velocity | Price | |
|---|---|---|---|---|---|---|---|
 |
4HX72 | 1 1/2" | Aluminum , Steel | 16-gauge Extruded Aluminum Frame, Aluminum Blades, Galvanized Steel Tie Rods and Stainless Steel Hardware | 2000 fpm | £46.61 | |
 |
4HX73 | 1.375" | - | 16-gauge Extruded Aluminum Frame, Aluminum Blades, Galvanized Steel Tie Rods and Stainless Steel Hardware | 2000 fpm | £63.53 | |
 |
4HX74 | 1.375" | - | 16-gauge Extruded Aluminum Frame, Aluminum Blades, Galvanized Steel Tie Rods and Stainless Steel Hardware | 2000 fpm | £69.49 | |
 |
4HX76 | 1.375" | - | 16-gauge Extruded Aluminum Frame, Aluminum Blades, Galvanized Steel Tie Rods and Stainless Steel Hardware | 2000 fpm | £82.74 | |
 |
4HX77 | 1.375" | - | 16-gauge Extruded Aluminum Frame, Aluminum Blades, Galvanized Steel Tie Rods and Stainless Steel Hardware | 2000 fpm | £87.07 | |
 |
5NKN4 | 1.5" | - | 16-gauge Extruded Aluminum Frame, Galvanized Steel Tie Rods and Stainless Steel Hardware | 2250 fpm | £105.42 | |
|
5NKN5 | 1.5" | - | 16-gauge Extruded Aluminum Frame, Galvanized Steel Tie Rods and Stainless Steel Hardware | 2250 fpm | £127.25 |
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+