Description
The Lennox 10A85 is a factory-authorized 2-stage natural gas valve engineered as a direct OEM replacement for compatible Lennox heating systems. Designed to deliver precise, staged gas flow control, this valve supports two-stage furnace operation — allowing the system to run at a lower firing rate during mild conditions and ramp up to full capacity when demand increases. The result is improved comfort, quieter operation, and enhanced energy efficiency compared to single-stage alternatives.
Key Features
- 2-stage operation for variable-capacity gas flow control
- Designed for natural gas (NAT GAS) applications
- OEM Lennox replacement part — SKU 10A85
- Supports efficient, low-stage and high-stage furnace firing
- Engineered for reliable, long-term performance in Lennox heating systems
- Helps reduce energy consumption during low-demand heating cycles
Benefits of 2-Stage Gas Valve Technology
Two-stage gas valves allow a furnace to modulate its heat output based on actual heating demand. During moderate weather, the valve operates at the lower stage, reducing fuel consumption and minimizing temperature swings. When outdoor temperatures drop and full heating capacity is needed, the valve opens to the second stage for maximum output. This staged approach extends equipment run times at lower capacity, improving humidity control and overall indoor comfort.
Application
- Compatible with select Lennox two-stage gas furnaces
- Natural gas fuel type
- Intended for use by qualified HVAC technicians
Important Note
Always verify compatibility with your specific Lennox furnace model before installation. Consult the equipment service manual or contact your Lennox distributor to confirm this part number is correct for your application. Installation should be performed by a licensed HVAC professional in accordance with local codes and manufacturer guidelines.
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