Designed for high-heat environments common in modern gas furnace vestibules

a high-durability replacement engineered specifically for T155 series warmer-cooler systems

Durable Construction: Manufactured from corrosion-resistant aluminum to withstand standard gas contaminants and environmental factors

but both use the same industrial-grade specifications and materials

Lennox 46K18 Burner Designed for high-heat environments commonThe Lennox 46K18 Burner is a high performance OEM furnace component engineered for precise combustion in residential and commercial heating systems. This natural gas in shot burner, which is identical to part number 46K1801, features a 5 inch length and a 46,000 BTU input rating. Constructed from aluminized steel to withstand high thermal stress, the Lennox 46K18 ensures optimal fuel to air mixing for clean ignition. As a direct replacement for Lennox