B Cabinet Return Plenum – Gas Furnace (16x25x4)

This 16" x 25" x 4" return plenum is designed for use with B-cabinet gas furnace applications. Constructed from durable galvanized steel, it provides a secure connection between the return air duct system and the furnace while accommodating a standard 16x25x4 filter. Commonly used in residential HVAC installations, this return plenum helps ensure proper airflow and filtration to support efficient system operation. Ideal for new installations, equipment replacements, and retrofit applications. Features: Designed for B-cabinet gas furnaces Accommodates 16x25x4 air filters Durable galvanized steel construction Supports proper return airflow and filtration Suitable for residential HVAC systems Item# 4067473; Part# SMPDF1625; Mfr Part# SMPDF1625