Lennox Signature Furnaces

Lennox Signature Furnace Overview

The Lennox Signature furnace includes two variable-speed gas furnaces — the SLP98V and SL280V — and two variable-speed oil furnaces — the SLO185V and the SLO183V. The SLP98V has an AFUE rating of up to 98.2, the SL280V has an AFUE rating of 80, the SLO185V has an AFUE of 85, and the SLO183V has an AFUE of up to 83. Both the SLO185V oil furnace and the SLP98V gas furnace have earned an Energy Star rating, and the SLP98V has been designated as one of the most efficient Energy Star qualified products of 2014. The SLP98V and the SL280V gas furnaces feature iComfort-enabled technology which allows the furnace, when combined with an iComfort Wi-Fi thermostat, to make changes to optimize performance and efficiency. iComfort technology also allows for remote temperature adjustments from a laptop, tablet, or smartphone.

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Consumer Reviews of Lennox Signature


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #7 of 29 Lennox Furnace
  • 50% of customers recommended

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Lennox Signature Furnace Reviews

"New Signature Lennox Furnace"

5.0 rating
Very Satisfied

I purchased a Lennox Signature Modulating Furnace and am very pleased with it. It is so quiet and we now have much better airflow to all rooms. Installation was very neat and professional and the Lennox sales staff were helpful and low pressure. I highly recomend this model


1.0 rating
Very Unsatisfied

Original Lennox hm30 Replaced with a second hm30. Second hm30 replaced with an hm61. Describe in one word: Junk. It is unimaginable that Lennox would allow a product like the hm30 on the market. I would not have considered the Complete Heat if it had not been a Lennox product.

Other Signature Reviews

Reviews of the Lennox Signature furnace seem to be mostly positive. A consumer on hvac-talk.com asked for advice on choosing between a Lennox Signature model and a Carrier. While there were positive reviews for both brands, a slight majority seemed to favor the Lennox. Commenters on avsforum.com praised Lennox's reputation and commented favorably on the iComfort Wi-Fi thermostat.

Signature Warranty

The Lennox Signature Series limited warranty is comprised of a 10-year parts warranty, a 10-year compressor warranty, and a 20-year or Limited Lifetime heat exchanger warranty (depending on the model). An Extended Limited warranty and a Complete Care Plus Extended warranty, which covers parts and labor, are also available.

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