Contractor Talk - Professional Construction and Remodeling Forum banner

combustion air in basment

  1. HVAC
    I am finishing my basment the furnace and water heater is in is 18x12 room by them selfs and planing to close off that room with a door. the furnace is a high-efficiency furnace 92 %. instead of using the port on the furnace for combustion air they installed a duct to the furnace room that is...