Performance 80 Single Stage FurnaceFLEXIBILITY 35? high for more flexibility in tight locations Factory shipped for natural gas, with Propane gas conversion kits available Four position - upflow/downflow/horizontal installation Category I venting Three position inducer capability Common venting with water heater SERVICE Self diagnostics Entire blower assembly mounted on rails COMFORT Adjustable timed blower Off delay 24 and 115 VAC humidifier terminal Electronic air cleaner terminal EFFICIENCY 80% AFUE efficiency range Single stage gas valve operation Single stage integrated control Multispeed, prelubricated PSC motors Induced draft blower In-shot burners QUALITY RPJ III Aluminized steel heat exchanger High temperature limit control prevents overheating Direct ignition with Silicon Nitride ignitor Flame roll-out sensors standard Louvered doors One piece prepainted steel cabinet Masonry chimney adapter available 5 year limited parts warranty