Lennox 20X51 - Lennox KHG714088812, Coaxial Elbow, 45 Degree, 3 x 5" (80/125mm)
Product description:
Lennox 20X51 is a genuine OEM coaxial venting component designed for high-efficiency Lennox gas furnaces and boilers that use concentric (coaxial) intake and exhaust systems. This part, Lennox KHG714088812, is a 45-degree coaxial elbow with a 3 x 5 inch (80/125 mm) configuration, allowing smooth directional changes in vent routing while maintaining proper separation of combustion air intake and flue gas exhaust.
This coaxial elbow is engineered to support safe and efficient operation of condensing appliances by preserving correct airflow, pressure balance, and condensate management. The 45-degree angle is ideal for installations where space constraints or layout requirements prevent straight vent runs, helping installers achieve code-compliant venting without excessive resistance or turbulence.
Manufactured from durable, corrosion-resistant materials, the Lennox 20X51 coaxial elbow is built to withstand acidic condensate and long-term exposure to combustion byproducts. As a factory-approved Lennox venting accessory, it ensures proper fit, reliable sealing, and compatibility with Lennox concentric vent systems.
Key features and benefits:
- Genuine Lennox OEM coaxial vent component
- 45-degree elbow for concentric vent routing
- 3 x 5 inch (80/125 mm) coaxial size
- Supports both combustion air intake and exhaust in a single assembly
- Designed for high-efficiency condensing gas furnaces and boilers
- Corrosion-resistant construction for long service life
- Helps maintain proper airflow and system efficiency
- Ideal for tight or offset venting installations
Applications:
- Lennox high-efficiency gas furnaces
- Lennox condensing boilers
- Coaxial (concentric) venting systems requiring a 45-degree directional change
This Lennox 20X51 coaxial elbow is an essential venting accessory for professional HVAC installations where safety, efficiency, and manufacturer compliance are critical. Using genuine Lennox vent components helps ensure reliable system performance and adherence to installation requirements.