About Lennox: A Legacy of Vision and Innovation. Lennox is built on a legacy of innovative firsts, from the introduction of the riveted-steel furnace in 1895 to some of the most efficient air conditioners available today. Over the years, Lennox has set the standard for home comfort, and we continue to push the standard forward with a lineup of more than 60 leading-edge products and a network of more than 6,000 full-service dealers. Need product information or a quote for service, please call 800-953-6669 to be connected with a local Lennox dealer or visit our website www.lennox.com.