Goodman ad9t800805cx 80 Afue Two Stage Gas Furnace 80K

Product Description

The GOODMAN ad9t800805cx is an 80 AFUE two-stage downflow and horizontal gas furnace rated at 80,000 BTU/h high-fire input with 64,000 BTU/h output. It uses a multi-speed ECM blower motor paired with a two-stage gas valve to deliver variable heating output — 80,000 BTU/h at high fire and 56,000 BTU/h at low fire — reducing short-cycling and improving comfort in single-family and multi-family residential applications. The unit operates on 115 volts, 60 Hz, single-phase AC power and carries ANSI certification. Licensed HVAC technicians install and commission this furnace.

This furnace is configured for downflow or horizontal installation, making it suited for applications where supply air is delivered downward through a subfloor plenum or horizontally through a side-discharge duct layout. With a 5-ton nominal cooling capacity of 60,000 BTU/h, it is sized to match large residential split systems. The unit width of 21 inches fits standard furnace closet and alcove installations. The Low NOx burner design meets emissions requirements in regions with strict air-quality regulations. HVAC contractors handling new construction or system replacements in residential and multi-family settings are the primary installing trade.

Key Features

• Two-stage gas valve delivers 80,000 BTU/h at high fire and 56,000 BTU/h at low fire for reduced short-cycling
• Multi-speed ECM blower motor with high-fire airflow of 1,843 CFM supports efficient air distribution
• 80 AFUE efficiency rating meets federal minimum efficiency standards for gas furnaces
• Low NOx burner design for compliance in emissions-regulated markets
• ANSI certified construction
• Downflow and horizontal installation configurations supported in a single unit

Compatibility

Designed as an OEM downflow and horizontal gas furnace for residential and multi-family HVAC systems requiring a 5-ton, 80,000 BTU/h, 80 AFUE two-stage unit with a 21-inch cabinet width.

Installation Notes

Installation must be performed by a licensed HVAC contractor in accordance with the International Fuel Gas Code (IFGC), local mechanical codes, and the manufacturer installation instructions. Shut off gas supply and disconnect electrical power before any service or connection work. Venting must be sized and configured per the appliance venting tables in the installation manual. Verify thermostat wiring and low-voltage control circuit connections before startup.