Backdraft spring-loaded dampers are recommended for the stale air to outside air duct.
This damper prevents outdoor air from entering the Air Exchanger while it’s in standby, off, or recirculating.
These dampers are installed with leaf-hinge vertical.
NOTE: Shipments to USA (delivery fee maybe finalized once shipment is confirmed). Shipments do not include custom clearance fees, brokerage fees and local taxes. (If custom fees are not prepaid to the shipping company, shipments will be stranded at the border and we are unable to retrieve the shipment) ALL SHIPMENTS TO USA ARE FINAL SALE.
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