OEM Lennox Heat Exchanger — 46K95

The genuine OEM Lennox 46K95 heat exchanger is the heart of your Lennox furnace's heating cycle. It transfers heat from the combustion gases to the circulating air stream while keeping those flue gases completely separated from the air you breathe. Engineered to precise Lennox dimensions and metallurgy, the 46K95 restores rated heating output, efficiency, and — most importantly — safe operation.

A compromised heat exchanger is a serious safety concern. Warning signs include visible cracks or corrosion, rust flakes or soot inside the cabinet, a flickering or rolling burner flame when the blower runs, unusual odors, water pooling near the furnace, and elevated carbon monoxide readings. Any of these indicates the exchanger may be leaking combustion byproducts and should be addressed immediately by a qualified technician.

OEM is non-negotiable for a component this critical. Lennox heat exchangers are fabricated from specific alloys and welded to tolerances that withstand repeated thermal cycling without premature cracking — quality that off-brand replacements rarely match. Installing the Lennox 46K95 ensures a correct fit, proper combustion clearances, safe venting, and continued warranty protection. In stock and ready to ship same day before 3PM CST.