Lennox: Trusted High-Efficiency Heating, Cooling & Air Quality Solutions for Comfortable Living

Lennox traces its roots back to 1895, when inventor Dave Lennox built one of the first riveted-steel furnaces in Marshalltown, Iowa, replacing the crack-prone cast-iron heaters common at the time. The business grew steadily through the early 20th century, expanding into Canada and adding central air-conditioning systems to what had been a heating-only lineup. In 1986, Lennox International Inc. was formally established as the parent company for Lennox Industries and other subsidiaries, and the company completed its initial public offering in 1999. Today the company is headquartered in Richardson, Texas, with more than a century of continuous operation in the HVAC industry across North America and beyond.

Over the decades Lennox has built a reputation for engineering firsts, including the industry's first high-efficiency gas furnace, the Pulse, in 1982, and CompleteHeat, the first combined space and hot-water heating system from a major manufacturer. Its current portfolio spans furnaces, central air conditioners, heat pumps, packaged rooftop units and indoor air-quality equipment, supported by smart controls such as the iComfort thermostat and ComfortSense system. The premium Dave Lennox Signature Collection features variable-capacity heat pumps and air conditioners rated above SEER2 25, while related brands including Armstrong Air, Ducane and AirEase extend Lennox engineering to a wider range of price points.

Efficiency and environmental responsibility remain central to Lennox's strategy, most recently reflected in the company's full transition of its product lines to the low-global-warming-potential refrigerant R-454B ahead of EPA phase-down deadlines. Continued investment in higher-efficiency compressors, smart connectivity and indoor air quality technology keeps the brand focused on lowering energy use while improving comfort. With a long track record of innovation, a broad dealer network across North America, and a steady push toward more sustainable heating and cooling, Lennox positions itself as a dependable, forward-looking choice for homeowners and contractors alike.