Weatherking W802W0503A14DZSBAS Gas Furnace 50000 Btu

Product Description

The WEATHERKING W802W0503A14DZSBAS is a natural gas forced-air furnace rated at 50,000 BTU/h with 80% AFUE efficiency. It uses a two-stage gas valve and an ECM variable speed blower motor to deliver precise heat output while reducing energy consumption during partial-load operation. The downflow configuration directs conditioned air downward through the supply plenum, making it well-suited for installations where ductwork runs below the unit. Licensed HVAC technicians typically install and service this equipment in residential and light commercial applications.

This furnace is designed for downflow installations, commonly found in closet-style or platform-mounted applications where supply air is routed beneath the unit into a crawlspace or basement duct system. The 14-inch cabinet width fits standard narrow-width furnace cutouts. With a nominal cooling tonnage of 3 tons, it is matched to central air conditioning coil systems installed in series. The two-stage burner and ECM motor combination supports longer, lower-capacity run cycles that improve humidity control and air distribution consistency.

Key Features

• 80% AFUE efficiency rating reduces fuel consumption compared to older standard-efficiency equipment
• Two-stage gas valve allows low-fire and high-fire operation for improved comfort and efficiency during moderate load conditions
• ECM variable speed blower motor adjusts airflow continuously to match system demand and reduce electrical draw
• Downflow configuration directs supply air downward, compatible with under-unit duct systems
• 14-inch cabinet width fits standard narrow furnace openings
• 3-ton nominal cooling capacity supports matched central AC or heat pump coil installations

Compatibility

Designed as an OEM-style downflow gas furnace for residential and light commercial forced-air heating systems requiring a 14-inch wide cabinet with a 50,000 BTU/h input and downflow airflow configuration.

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 beginning any service or installation work. Proper venting, combustion air supply, and gas line sizing must be verified before startup. ECM motor control wiring should be handled carefully to avoid damage to the low-voltage circuit board connections.

Technical Specifications

• Fuel Type: Natural Gas
• Heating Capacity: 50000 BTU/h
• AFUE Efficiency: 80%
• Stage: Two Stage
• Motor Type: ECM Variable Speed
• Configuration: Downflow
• Cabinet Width: 14 inches
• Nominal Cooling Tonnage: 3 tons

Standard Information

• Brand: WEATHERKING
• Manufacturer Part Number: W802W0503A14DZSBAS