The Lennox Signature Collection SLP98V gas furnace achieves a best-in-class 98.7% annualized fuel efficiency ( AFUE) just 2.3% of the heat produced is lost with the combustion gas exhaust. Most Efficient Gas Furnace (SLP98V) 98.7 AFUE You can find a lot of positive feedback for this heat exchanger online.

The ArmorTuf steel is patented and offers energy efficiencies and reliability. Lennox has installed a Duralok Plus heat exchanger that is made of ArmorTuf steel. Lennox gas furnace prices for all models are listed in below list, so you’ll have a good idea of what to expect before you call dealers to get estimates. Now let’s get started! You can check a quick content navigation below:Ī heat exchanger is the most important component of any gas furnace. Best – Dave Lennox Signature Collection furnaces (SL): Two-stage and modulating furnaces with 80% AFUE models and furnaces up to 98.7% AFUE, currently the most efficient gas furnace made.Better – Lennox Elite Series furnaces (EL): Single-stage and two-stage furnaces with 80% models and 90%-plus models.Basic – Lennox Merit Series furnaces (ML): Single-stage furnaces with 80% and 90%-plus efficiencies.Lennox makes ten gas furnaces in three series: The US Climate chart below will ensure you select a Lennox furnace that produces cost-effective heating where you live. You’ll find the comprehensive information needed to decide if Lennox is the brand you want and which model will best serve your home. This Lennox gas furnace buyers guide is your one-stop source for researching one of today’s leading furnace lines. There are several crucial steps you need to take before you even start to think about the brand. īefore you dive into the specific brand review, we highly recommend you to read our elaborate Gas Furnace Buying Guide in advance. If you are looking for oil furnace, you can read our Lennox Oil Furnace Buying Guide. Note: Note: This article is only talking about gas/propane furnace.

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