Are Lennox furnaces a good brand?

Yes, Lennox furnaces are a good brand and are considered premium brand offering highest efficiency and quietest operation in industry. Lennox furnaces including Merit ML296V, Elite EL296V, and Signature SLP99V are made in Marshalltown, Iowa and other US plants with heavy-duty construction. Based on HVAC dealer surveys and Consumer Reports, Lennox furnaces have first-year service call rates around 9 to 12 percent, which is slightly higher than Trane and Carrier at 8 to 10 percent but better than value brands like Goodman at 10 to 13 percent, indicating good reliability. Key strengths that make Lennox furnaces a good brand include most efficient gas furnace in US at 99 percent AFUE for SLP99V versus Trane max 97.3 percent and Carrier max 98.5 percent, extremely quiet operation at 60 decibels due to SilentComfort technology that is quietest among gas furnaces, modulating gas valve in premium models that adjusts from 35 to 100 percent capacity for ultimate even heating within 0.5 degrees, and innovative features like iComfort communicating and SunSource solar ready. Common complaints include proprietary parts that cost 20 to 30 percent more than standard parts, for example control board at 400 to 700 dollars versus 200 to 400 dollars for Goodman, and higher upfront cost of 3,000 to 9,000 dollars installed versus Goodman at 3,000 to 5,500 dollars. For homeowners wanting most efficient and quietest, Lennox is excellent choice.