DAYTON Damper Backdrafts
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B| Style | Model | Rough Opening Width | Fits Fan Dia. | Overall Width | Overall Height | Frame Material | Airflow Direction | Rough Opening Length | Rough Opening Dia. | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 4HX72 | 8" | 8" | 10 3/4" | 10 3/4" | Galvanized Steel | Horizontal | 8" | 8 1/2" | €65.55 | |
| B | 4HX73 | 10" | 10" | 12 3/4" | 12 3/4" | Aluminum | Horizontal | 10" | - | €89.37 | |
| A | 4HX74 | 12 1/2" | 12" | 14 3/4" | 14 3/4" | Aluminum | Horizontal | 11 1/2" | 12 1/2" | €97.72 | |
| A | 4HX75 | 13 1/2" | 12" | 15 3/4" | 15 3/4" | Aluminum | Horizontal | 12 1/2" | 13 1/2" | €110.62 | |
| A | 4HX76 | 14 1/2" | 12" | 16 3/4" | 16 3/4" | Aluminum | Horizontal | 13 1/2" | 14 1/2" | €116.35 | |
| A | 4HX77 | 15 1/2" | 12" | 17 3/4" | 17 3/4" | Aluminum | Horizontal | 14 1/2" | 15 1/2" | €122.42 | |
| A | 5NKN4 | 17 1/2" | 16" | 19 3/4" | 19 3/4" | Aluminum | Horizontal | 17 1/2" | 17 1/2" | €148.27 | |
| A | 5NKN5 | 20 1/2" | 20" | 22 3/4" | 22 3/4" | Aluminum | Horizontal | - | 20 1/2" | €147.16 | |
| A | 5NKN6 | 25 1/2" | 24" | 27 3/4" | 27 3/4" | Aluminum | Horizontal | 25 1/2" | 25 1/2" | €189.63 |
Damper Backdrafts
Dayton damper backdrafts are suitable for use in ductwork, roof curbs or wall collars when using a fan or power roof ventilator. The blades of these dampers are provided with a felt seal on the leading edge for superior protection from the weather and are spring supported to permit blades to open comfortably. Choose from a range of these damper backdrafts, available in 1.375 and 1.5-inch widths.
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