This Lennox 23X25 – 624349-03 Heat Exchanger AL 240-BTU is a direct replacement heat exchanger engineered for reliable performance in compatible Lennox gas furnaces. Precision-built from durable aluminized steel, this 240,000-BTU heat exchanger delivers efficient heat transfer and long-lasting operation to help maintain optimal indoor comfort. Designed to meet OEM specifications, it ensures proper fit, dependable performance and sustained airflow within the heat exchanger core. Ideal for HVAC technicians, contractors and homeowners seeking a high-quality replacement part, this Lennox heat exchanger helps restore your system’s heating capacity while reducing downtime. Backed by factory-grade quality, it enhances furnace efficiency and supports consistent warmth during colder months.

 

Key Features:

• OEM Lennox heat exchanger, part number 624349-03
• Fits 23X25 size furnace applications
• 240-BTU capacity for dependable heat output
• Manufactured from aluminized steel for corrosion resistance
• Exact fit to OEM specifications for easy installation

 

Application:

Designed for use in compatible Lennox residential gas furnaces requiring a 23x25 heat exchanger with 240-BTU rating. Always verify model compatibility before purchase.