Goodman 80000 BTU Two Stage Gas Furnace is very efficient in its job and packs a number of useful features. Some of the most useful features are – 2 stage gas valve A heavy-duty aluminized steel made tubular heat exchanger Silicon Nitride made durable igniter A control board capable of self-diagnostic An insulated furnace cabinet that protects everything inside Variable-speed blower with corrosion-resistant vent Gas Furnace Specifications: – General Information Type Gas Furnace Fuel Type Natural Gas Vent Type Direct Vent Blower motor ECM Variable-speed Modulating/Staging Two Stage Gas Conversion Kit Available Configuration Upflow/Horizontal UPC 663051567405 Performance Heating 80000 BTU High Fire Input 80000 BTU Low Fire Input 56000 BTU High Fire Output 64000 BTU Low Fire Output 44800 BTU Low NOx Emissions No Minimum Air flow 2000 CFM AFUE 80% Dimensions Flue Connection Size 4 Inches Cabinet Width 21 Inches Product Depth 28 Inches Product Height 33 1/2 Inches Product Width 21 Inches Shipping weight 121 Pounds Dimensions Voltage 115 Volts Frequency 60 Hz Phase 1 Minimum Circuit Ampacity 10.6 A Recommended Breaker Size 15 A Certifications Country Of Origin U.S. ISO Certified Yes AHRI Certified Yes ETL Listed Yes AHRI 202327713 Warranty Information Parts Warranty 10 Years Unit Replacement Warranty 10 Years Heat Exchanger Warranty Lifetime