Take advantage of the durable 30-gauge zinc-coated, galvanized steel construction of this Master Flow 20 in. x 25 in. Return Air Box to equip your HVAC system with a long-lasting air return box. Its 20 in. x 25 in. opening acts as a convenient connection from return fittings to a ceiling or wall grill (not included) for return air needs. Cut your own opening and install a collar (not included)up to 20 in. diameter to attach pipe or flexible duct as needed.
- Provides collecting port for central return duct
- Traditionally used in a ceiling or wall application as an air return chamber, acting as a convenient connection for air return
- Compatible with pipe or flexible duct up to 20 in. diameter
- 30-gauge zinc-coated, galvanized steel construction provides durability