DUC-BLOC PAN – 24″X34″ LARGE RETURN PAN
Sierra Building Science, Inc.
Will fit over 20″x30″ return grilles. Creates an airtight seal around return grille without taping. Same airtight gasket as regular pans. See it in use in the “Part 3 of 3 – How to Use Duc-Blocs” video above. Requires two Zipwall poles, purchased separately.
Duct tester collar (flange) and flex duct not included.
Shipping will be charged separately based on the size and weight of the replacement