OEM Lennox Heat Exchanger — 99W41
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The genuine OEM Lennox 99W41 heat exchanger is the heart of your gas furnace's heating process. It transfers heat from the combustion gases to the circulating air stream while safely containing and venting exhaust byproducts. Engineered to exact factory specifications, the 99W41 delivers the precise fit, airflow, and structural integrity your compatible Lennox furnace requires.
Common Failure Symptoms
Heat exchangers can crack or corrode after years of thermal expansion and contraction. Warning signs include visible rust or cracks, a flickering or shifting burner flame, soot buildup, unusual odors, or a carbon monoxide detector alarm. A compromised heat exchanger is a serious safety hazard and should be replaced immediately.
Why OEM Matters
A heat exchanger is a safety-critical, containment component — dimensional accuracy and metallurgy are non-negotiable. The OEM Lennox 99W41 is manufactured to the tolerances your furnace was designed around, ensuring proper combustion sealing, efficient heat transfer, and safe venting. Genuine Lennox parts help maintain your warranty and give you confidence in your family's safety.
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