2 Pcs 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector, Only Fit with Metal Conduit

Descripción

💨 Seal the deal on airflow — keep your space fresh, quiet, and efficient!

This 2-pack of 4-inch backdraft dampers features galvanized steel construction with aluminum blades and stainless steel springs, designed exclusively for metal ducts. Their dual spring-loaded blades provide unidirectional airflow, preventing backflow while reducing noise through rubber seals. Easy to install and compatible with standard 4-inch ducts, these dampers enhance HVAC efficiency and maintain a quieter, fresher environment.