Backdraft Damper consists of circular ducts made of galvanized sheet metal which makes it highly durable. It allows efficient flow through exhaust ducts to the exterior. It also prevents the unwanted flow of air into the house while your exhaust fans are off. 

In addition, Backdraft Damper helps maintain a room temperature in your room by preventing cold air from entering in. It is available in variable sizes such as 4", 5",6",7",8",10",12",14" and 16".

Features:

• It consists of spring-loaded butterfly aluminum damper blades engulfed in a 20-gauge galvanized steel housing. 

• It can be installed in any direction or orientation to prevent backflow and is designed for use in AC, Heating, Vent, and other HVAC application temperatures from -22 to 180 degrees F(Fahrenheit).

• It is very easy and has simple installation.

• It requires minimal pressure to open 0.04 to 0.08 in w.g. It provides maximum automatic backflow protection.

Specifications:

• SKU/ Model Number: DL-403012

• Brand: HVAC Express

• Size: 12”