Heavy Duty 6 Inch Galvanized Steel Draft Blocker Blocks Cold Infiltration And Keeps Your Supply Duct Flowin Smooth For A Rock Solid One Way Air Damper Install Setup

Heavy duty galvanized steel draft blocker seals ducts
✔️ 6 inch galvanized steel dampener with aluminum flaps

This single ventilation shutter blocks cold drafts and keeps duct airflow smooth across AC units and heating vents.

✅ Galvanized steel frame stops freezing air from blowing backward
✅ Aluminum flap leaves slide freely to regulate positive vent pressure
✅ Push install design drops straight into round ductwork for tight seals
✅ Sized for metal or foam pipe but skips plastic ducts entirely

💡 How does a backdraft damper improve airflow balance in home HVAC layouts? It locks unconditioned indoor air out while letting fresh supply move forward. - The steel housing grips tight over flexible ducts to stop heat loss fast. - Spring loaded blades snap closed when fan RPM hits zero. - Handy for shop garages and attics where uneven pressure ruins comfort. - Clean install saves labor costs since no tape or clamps needed upfront.

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