OEM Lennox Burner Box — 61M74
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
The Lennox 61M74 (factory reference LB-95152) is a genuine OEM burner box designed for Lennox gas furnaces. The burner box houses and positions the burners, shielding the combustion process and directing the air-fuel mixture into the heat exchanger for efficient, contained combustion. Its precise geometry supports proper flame containment, airflow, and safe venting of combustion byproducts.
Common failure symptoms: A damaged or corroded burner box can lead to misaligned burners, unstable or rolling flames, flame rollout trips, rust and scale flaking into the combustion area, or compromised heat exchanger protection. If you see signs of overheating, warping, or corrosion around the burner compartment, the burner box should be replaced to maintain safe operation.
Why OEM matters: The Lennox 61M74 is manufactured to exact factory dimensions so burners, igniter, and flame sensor seat correctly and airflow matches the furnace's design. Aftermarket housings can misalign critical components, disrupt combustion, and void your warranty. The genuine 61M74 ensures correct fit, safe flame containment, and reliable performance for your Lennox furnace.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days