Flat Insulated Square-to-Round Package Unit Adapter

Connect round duct to package-unit supply or return openings with insulated galvanized-steel square-to-round adapters. Choose individual adapters or matched sets in dimensions suited to common Goodman, Lennox, Bosch, York, Trane/RunTru, and Ameristar/Impak equipment.

Buying guide: How to measure for a square-to-round adapter