Weatherking W802W0503A14UHSBAS Gas Furnace 50000 Btu

Product Description

The WEATHERKING W802W0503A14UHSBAS is a natural gas forced-air furnace rated at 50,000 BTU/h with 80 percent AFUE efficiency. It runs a two-stage gas valve paired with an ECM variable-speed blower motor, which allows the unit to operate at a reduced fire and airflow rate during mild demand and ramp up only when the load requires it. The result is steadier temperature distribution, quieter operation during first-stage runtime, and lower blower energy consumption compared to single-stage PSC-motor units. Licensed HVAC technicians install and commission this furnace as the primary heating appliance in residential forced-air systems.

This furnace is configured for upflow or horizontal installation, making it suitable for closet, basement, or attic applications where the air handler discharges upward or horizontally into the supply plenum. At 14 inches wide, it fits standard narrow-width equipment alcoves common in residential construction. The 3-ton nominal airflow capacity aligns it with typical 2.5- to 3-ton split-system cooling coils for year-round system pairing. It is intended for residential new-construction and replacement applications using natural gas as the fuel source.

Key Features

• 80 percent AFUE efficiency meets minimum federal efficiency standards for non-weatherized gas furnaces
• Two-stage heating reduces short-cycling and improves comfort by matching output to actual load
• ECM variable-speed blower motor lowers electrical consumption during continuous fan and heating operation
• Upflow and horizontal configuration supports multiple installation orientations
• 14-inch cabinet width fits standard narrow equipment closets and utility rooms
• 3-ton nominal airflow capacity supports pairing with matching split-system cooling coils

Compatibility

Designed as an OEM upflow/horizontal natural gas furnace for residential forced-air heating systems. No specific compatible model numbers were provided in the product data.

Installation Notes

Installation must be performed by a licensed HVAC contractor in accordance with the National Fuel Gas Code (NFPA 54 / ANSI Z223.1) and applicable local mechanical codes. Shut off gas supply and disconnect electrical power before servicing or connecting the unit. The ECM blower motor requires correct low-voltage control wiring and a properly sized electrical circuit per NEC requirements. Verify flue venting is sized and configured per the manufacturer instructions and local authority having jurisdiction before startup.

Technical Specifications

• Fuel Type: Natural Gas
• Heating Capacity: 50000 BTU/h
• AFUE Efficiency: 80 percent
• Stages: Two Stage
• Motor Type: ECM Variable Speed
• Configuration: Upflow / Horizontal
• Cabinet Width: 14 inches
• Nominal Cooling Tons: 3 tons

Standard Information

• Brand: WEATHERKING
• Manufacturer Part Number: W802W0503A14UHSBAS