CAT CLASS: 1500149

Return Air Box Assembly Duct Plenum


The return plenum box receives used air from the return vents and distributes it to your HVAC unit to be heated or cooled again. The used air must pass through a filter before entering the return plenum, ensuring that it's clean before it reenters your AC, heat pump, or furnace.

Safety information

Safety Requirements
  • Eye Protection
  • Gloves