The full line of Lennox® Merit brand gas furnaces use a unique, award-winning primary heat exchanger design that continues to set reliability records in our testing laboratory.

Modulating Gas Furnaces feature self-calibrating gas valves that allow modulating performance from 35% to 100% and offer outstanding levels of comfort, efficiency, and quiet performance.

Variable-Speed Gas Furnaces quickly, quietly, and efficiently deliver outstanding levels of warm comfort and reliability.

Multi-Speed Gas Furnaces offer reliable performance and time-tested durability and are designed to deliver quiet performance.

Reliability and Performance You Can Trust

With the Lennox® Merit brand reliable, long-lasting product performance is our top priority. We achieve that goal through superior craftsmanship and world-class manufacturing processes, which help ensure that Lennox® Merit brand products are the best we can provide to you. To meet our high standards, our products go through our most rigorous quality assurance scrutiny. Our engineers are constantly improving each Lennox® Merit brand product by incorporating the very latest in technology, design and efficiency.

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