A lot of engineering effort went into Goodman 80000 BTU Single Stage Gas Furnace GMS80804BN. Thankfully the efforts from Goodman team paid off & we got this outstanding performer. It offers some major advantages over others and that’s why we used Goodman 80000 BTU Single Stage Gas Furnace GMS80804BN in our 4 Ton 14 SEER complete gas system. Here are some of the most notable features of this unit – 4-Speed circulator blower motor for proper heat distribution Unique tubular design for the heat exchanger that allows for an outstanding heat transfer rate Energy-efficient motor keeps the bills on check Aluminized steel construction for maximum integrity Silent-operating blower motor Smart self-diagnostic control board panel for intended solid performance Insulated cabinet for minimum air leak (as low as 2%) Easy troubleshooting and maintenance thanks to the smart control board Gas Furnace Specifications: – General Information Type Gas Furnace Fuel Type Natural Gas Vent Type Chimney Vent Blower motor PSC Multi-speed Modulating/Staging Single Stage Gas Conversion Kit Available Configuration Upflow/Horizontal UPC 663051543782 Performance Heating 80000 BTU High Fire Input 80000 BTU High Fire Output 64000 BTU Low NOx Emissions No Minimum Air flow 1600 CFM AFUE 80% Dimensions Flue Connection Size 4 Inches Cabinet Width 17 1/2 Inches Product Depth 28 3/4 Inches Product Height 33 3/8 Inches Product Width 17 1/2 Inches Shipping weight 106 Pounds Dimensions Frequency 60 Hz Phase 1 Minimum Circuit Ampacity 12.5 A Recommended Breaker Size 15 A Certifications Country Of Origin U.S. ISO Certified Yes AHRI Certified Yes ETL Listed Yes AHRI 5012601 Warranty Information Parts Warranty 5 Years Heat Exchanger Warranty 20 Years