AIR CONDITIONING AND HEATING 15,000 BTU Central/Ducted 15,000 BTU (Non-Central/Non-Ducted) 13,500 BTU Central/Ducted 13,500 BTU (Non-Central/Non-Ducted) 15,000 IPO 13,500 11,000 BTU 7,000 BTU Swamp Cooler Furnace (30,000-35,000 BTU) Furnace (21,000-28,000 BTU) Furnace (13,000-17,000 BTU) Furnace (10,000-12,000 BTU)