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DAYTON Damper Backdrafts


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DAYTON 4HX73A
DAYTON 4HX74B
StyleModelFrame MaterialFree AreaRough Opening WidthOverall WidthRough Opening LengthOverall HeightSwitch ActionDamper SizePrice
A
4HX73		Aluminum0.4 sq. ft.10"12 3/4"10"12 3/4"NC10" x 10"€87.43
B
4HX74		Aluminum0.7 sq. ft.12 1/2"14 3/4"11 1/2"14 3/4"NC12" x 12"€95.64
B
4HX75		Aluminum0.9 sq. ft.13 1/2"15 3/4"12 1/2"15 3/4"NC13" x 13"€108.28
B
4HX76		Aluminum0.9 sq. ft.14 1/2"16 3/4"13 1/2"16 3/4"NC14" x 14"€113.89
B
4HX77		Aluminum1.2 sq. ft.15 1/2"17 3/4"14 1/2"17 3/4"NC15" x 15"€119.82
B
5NKN4		Aluminum1.7 sq. ft.17 1/2"19 3/4"17 1/2"19 3/4"NC17" x 17"€145.10
B
5NKN5		Aluminum2.5 sq. ft.20 1/2"22 3/4"-22 3/4"NC20" x 20"€153.00
B
5NKN6		Aluminum3.8 sq. ft.25 1/2"27 3/4"25 1/2"27 3/4"NC25" x 25"€197.23
B
4HX72		Galvanized Steel0.3 sq. ft.8"10 3/4"8"10 3/4"Normally Closed8" x 8"€64.16

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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