Lennox 58W10 Header Box

For veteran HVAC technicians and mechanical contractors, the Lennox 58W10 Plastic Header Box is the standard OEM replacement required to maintain the structural integrity of the secondary heat exchanger assembly. This critical condensate collector box is engineered specifically for use in high-efficiency Lennox gas furnaces, such as the EL92TB and EL95TB series, where managing acidic condensate is paramount. Precision-molded from specialized high-grade corrosion-resistant plastic, the 58W10 is designed to withstand the thermal cycling and chemical exposure common in 90% AFUE and higher systems. Its exact 19.4-inch length and 10.85-inch width ensure a flush, airtight seal against the heat exchanger's cold-end header, preventing exhaust bypass and ensuring proper drainage through the furnace condensate trap. When performing a furnace header box replacement, using this genuine Lennox HVAC part ensures that the system’s pressure switch readings remain within manufacturer specifications, protecting the combustion blower and overall unit performance in demanding residential and light commercial applications.

• OEM Compatibility: Precision fit for Lennox 92% and 95% AFUE gas furnaces, eliminating the need for field modifications.
• Enhanced Durability: Manufactured from corrosion-resistant plastic to prevent premature failure caused by acidic furnace effluent.
• Critical Component Protection: Functions as a high-reliability condensate collector box, safeguarding the inducer motor from moisture intrusion.
• Optimized System Efficiency: Maintains the necessary static pressure required for the secondary heat exchanger to perform at peak thermal transfer rates.

When should a Lennox 58W10 Header Box be replaced?
Replace this part if you observe visible cracks, warping, or persistent water leakage around the secondary heat exchanger. Technicians often identify failure during furnace maintenance when pressure switch trips occur due to blocked or leaking collector ports.

Is the gasket included with the 58W10 plastic header box?
This SKU typically covers the plastic header box housing. It is a best practice for contractors to verify if a new header box gasket (often SKU 58W12) is required separately to ensure a 100% leak-proof installation.

Which furnace models use the 58W10?
The 58W10 is primarily utilized in Lennox high-efficiency units with specific BTU inputs. Always cross-reference the Lennox part number against the cabinet nameplate to confirm matching furnace replacement parts for the specific chassis size.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.