Dayton 3G-OTH-74762 — Technical Specifications

Name: Dayton 3G-OTH-74762 25"H-W 4.5"L Aluminum Backdraft Damper: For 20 in Fan, Single Panel, 25 in H, 25 in W, 2 in D, Felt (MPN 4HX67). Key specifications — Airflow Direction: Vertical; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2250 fpm; Mounting Position: Horizontal.
Brand: Dayton

The Dayton 25"H-W 4.5"L Aluminum Backdraft Damper (SKU 4HX67) is a ceiling/roof-mount backdraft damper designed for a 20-inch fan. It features a single-panel flat blade design with vertical airflow direction and horizontal mounting, supporting a maximum air velocity of 2250 fpm. The unit measures 25 inches in height, 25 inches in width, and 2 inches in depth, with felt construction.

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Technical Specifications

Parameter	Value
D	2 in
H	25 in
Type	Single Panel, 25 in W, Felt
Brand	DAYTON
Blade Type	Flat Blade
Airflow Direction	Vertical
Mounting Position	Horizontal
Maximum Air Velocity	2250 fpm
Manufacturer Part Number	4HX67