ALDES 4 Inch Round Spring Loaded Backdraft Damper - Professional Grade
Book Details
Description
- Highest Rated Premium Airflow Control Backdraft Dampers
- Spring-loaded butterfly aluminum damper blades encased in a 20-guage galvanized steel housing
- May be installed in any position or orientation to prevent backflow and designed for use in AC, Heating, Vent and other HVAC application temperatures from -22 to 180 degrees F (Fahrenheit)
- Extremely easy and secure inline duct insertion installation. Available in 4", 5", 6", 7", 8", 10", 12", 14" and 16".
- Minimal pressure to open. 0.04 to 0.08 in. w.g. Maximum automatic back flow protection
