4 inch manual damper

HVAC Express vents, dampers and ducting accessories are made in the USA and include Manual Duct Damper - Spool Damper - 6 Inch (GSD 6). HVAC Express vents, dampers and ducting accessories are made in the USA and include Manual Duct Damper - Spool Damper - 8 Inch (GSD 8). 48" Door Width, /4" Closer Body Length, Light-Medium-Duty Door Closer to Hold Open Manual Damper Dark Bronze Finish MSC# Falcon .

4-in HVAC Duct Manual Volume Damper with Sleeve - Galvanized Sheet Metal Round Volume Damper Airflow Ducting Branch, Adjustment Handle HVAC Air Balancing System - Easy to Install 4" Round Take-Off Collar w/Damper, 26 ga. Install Master Flow 4 in. Dampers (6-Pack) in individual runs of round pipe in an HVAC system (each sold separately) to balance and adjust the flow of air. These dampers include spring-loaded hardware and are constructed from galvanized steel to provide durability. This item 4-In HVAC Duct Manual Volume Damper with Sleeve - Galvanized Sheet Metal Round Volume Damper Airflow Ducting Branch, Adjustment Handle HVAC Air Balancing System - Easy To Install AC Infinity 4" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans.

with Class 1A motorized dampers with a maximum leakage rate of 4 cfm/ft2 at 1 Insert type round single blade. • Blade seals VCDR Dimension inches. less than 8 cfm/sq ft at 4 inch WC at °F (°C). Smoke and Control. A smoke and control damper is Manual locking quadrants are used when the damper. Alan Mfg Air Balancing Damper. Standard or Gasketed Damper Blade. Handle with OVAL Regulator Dial. 4" - 16" Duct sizes. Galvanized Steel Tube with End Crimp.