Weatherking W801CA100521ZSA Downflow Gas Furnace 100K Btu

Product Description

The WEATHERKING W801CA100521ZSA is a downflow configuration residential gas furnace rated at 100,000 BTU/h input with 80% AFUE efficiency. It uses a constant torque electrically commutated motor (ECM) for blower operation, which provides reliable airflow performance across varying static pressure conditions. The cabinet stands 34 inches tall, making it suitable for space-constrained mechanical rooms and closet installations. Direct spark ignition (DSI) replaces standing pilots for improved reliability. The integrated control board includes dip switches for straightforward system setup and a QR code for quick access to product documentation. CSA certified for residential gas-fired heating applications.

This furnace is designed for downflow installations where conditioned air is discharged downward, typically into an underfloor duct system or a platform plenum. It is a single-stage heating unit running on natural gas, sized at 5 nominal tons of matched cooling capacity. The removable aluminized steel heat exchanger simplifies field service and inspection. The 7-segment LED diagnostic display aids technicians in identifying fault codes without additional test equipment. Typical installations include residential homes and light commercial spaces where a downflow gas furnace is specified by design.

Key Features

• 80% AFUE single-stage natural gas heating rated at 100,000 BTU/h
• Constant torque ECM blower motor for consistent airflow and energy efficiency
• Downflow configuration with 34-inch low-profile cabinet for space-constrained installs
• Removable aluminized steel heat exchanger for improved field serviceability
• Integrated control board with dip switches and QR code for fast setup and documentation access
• 7-segment LED fault display and DSI ignition for reliable operation and diagnostics
• CSA certified

Compatibility

Designed as an OEM-style downflow residential gas furnace for natural gas systems with a 5-ton nominal cooling match and standard downflow duct configurations.

Installation Notes

Installation must be performed by a licensed HVAC technician in accordance with the International Fuel Gas Code (IFGC) and applicable local codes. Shut off the gas supply and disconnect electrical power before servicing or making connections. Downflow furnaces require a properly sized floor plenum or platform base rated for the application. Verify vent sizing and combustion air requirements per manufacturer documentation before commissioning.

Technical Specifications

• Efficiency: 80% AFUE
• Heating Capacity: 100,000 BTU/h
• Fuel Type: Natural Gas
• Configuration: Downflow
• Stage: Single Stage
• Motor Type: ECM (Constant Torque Electrically Commutated)
• Nominal Cooling Match: 5 tons
• Cabinet Height: 34 inches
• Ignition: Direct Spark Ignition (DSI)
• Certifications: CSA

Standard Information

• Brand: WEATHERKING
• Manufacturer Part Number: W801CA100521ZSA