Dayton 3G-OTH-76217 — Technical Specifications

Name: Dayton 3G-OTH-76217 21"H-W 5.75"L Aluminum Backdraft Damper: For 18 in Fan, Single Panel, 21 in H, 21 in W, 2 1/2 in D (MPN 4C558). Key specifications — Airflow Direction: Horizontal; Blade Type: Flat Blade; Brand: DAYTON; Maximum Air Velocity: 2500 fpm; Mounting Position: Vertical.
Brand: Dayton

The Dayton 4C558 is a wall-mount backdraft damper with flat blades, designed for horizontal airflow in a vertical mounting position. It measures 21 inches high by 21 inches wide with a 2.5-inch depth, and is constructed of aluminum for use with an 18-inch fan. The damper supports a maximum air velocity of 2500 fpm.

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Technical Specifications

Parameter	Value
D	2 1/2 in
H	21 in
Type	Single Panel, 21 in W
Brand	DAYTON
Blade Type	Flat Blade
Airflow Direction	Horizontal
Mounting Position	Vertical
Maximum Air Velocity	2500 fpm
Manufacturer Part Number	4C558