This superior efficiency level is also achieved in the SLP98V with a modulating gas valve that, like cruise control, runs at the optimal level needed to keep temperatures perfectly balanced without overheating. This Lennox gas furnace is built with primary and secondary heat exchangers and condensing technology to capture and transfer more heat than any other gas furnace available today. 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.
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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.