I have several HVAC supply items that were built and then furnace specs changed. All are brand new never used. Price for everything $600
- Return Air Plenum. Measures 36"x29"x15". Includes try for up a 4" air filter $250
- Supply plenum 20"x21"x21" $100
- Supply plenum 20"x21"x21" with 12" Honeywell zone damper attached. $300