Lennox furnaces are generally considered good, high-quality furnaces by HVAC professionals and consumers, though like any brand they have strengths and some reported weaknesses, and they are positioned as a premium brand alongside Trane and Carrier. Lennox International, founded in 1895 in Marshalltown, Iowa, and headquartered in Richardson, Texas, makes residential furnaces including its high efficiency Dave Lennox Signature Collection with AFUE ratings up to 99 percent, which are among the most efficient furnaces available. Pros of Lennox furnaces include high energy efficiency, quiet operation with variable speed blowers, good warranty coverage with 10 year parts and limited lifetime heat exchanger warranties when registered, and innovative features like Precise Comfort technology. Cons include higher upfront cost than budget brands like Goodman, higher parts costs, and some models in the past had issues with evaporator coils leaking and Pulse furnace heat exchangers in the 1980s, though those are old. Overall, Lennox furnaces are rated well by Consumer Reports and HVAC contractors for reliability and efficiency, with proper installation by an authorized Lennox dealer being critical for performance. They are considered good furnaces for homeowners seeking high efficiency and are popular in Canada for cold climate performance.
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