Beginning with the introduction of the world's first riveted-steel furnace in 1895, Lennox has focused on delivering on the values of trust, innovation and quality. Since 1952, Lennox has been designing and developing innovative air conditioner units that have made people's homes and lives more comfortable and energy efficient.

1895

Dave Lennox builds and markets the world's first riveted-steel furnace.

1952

Lennox expands its product line with the introduction of quality-built residential central air-conditioning systems.

1973

Lennox increases air-conditioning efficiency with the development of a two-speed hermetic compressor.

1978

Always innovating, Lennox is the first HVAC manufacturer to produce solar-powered air conditioners.

1984

Lennox introduces the first air conditioner to achieve an efficiency rating of 15.00 SEER.

2003

Leading the industry, Lennox introduces the first air conditioner to achieve a 19.20 SEER efficiency rating.

2010

Lennox launches Healthy Climate Solutions^™, which work with HVAC systems to combat indoor air quality issues.

2013

Lennox introduces the XC25. With efficiencies of up to 26 SEER, it's the most precise and efficient air conditioner available.

2016

Lennox launches the iComfort^® S30 ultra smart thermostat, helping homeowners maximize the efficiency of their air conditioner units.

2017

Lennox continues to design innovative and technologically advanced air conditioner units that lead the way in comfort and efficiency.