Profile: National Air Warehouse provides heating and air conditioning equipment & parts. We offer straight cool air conditioners, heat pumps, air handlers, and gas furnaces. Our multi-position gas furnace split system is designed for upflow vertical and horizontal applications. Our single stage programmable air conditioner thermostat is used with single stage air conditioner systems. Our cased upflow/downflow indoor coil is suitable for gas or oil furnaces. We also offer capacitors, motors, condensers, and double pole contactors.