slp99v
Variable-Capacity Gas Furnace
The quietest and most efficient furnace you can buy
ENERGY STAR® Qualified
Dave Lennox Signature® Collection models come with a 10-Year Limited Warranty on covered components. Furnace heat exchangers offer either 20-Year or Lifetime Limited Warranties. For more information, visit www.Lennox.com/WarrantyYourWay.
Heating Savings
Our Lennox Dealers are here to help
Your Location: Find a DealerFeatures
The Ultimate Side of Perfect Air
Not only is the SLP99V gas furnace part of the Dave Lennox Signature® Collection, it’s part of the Ultimate Comfort System™. Which combines the best of everything Lennox has to offer to create an unprecedented whole-home comfort system that seamlessly and intelligently works together to stay finely tuned to your home and deliver consistently clean, perfect air.
Consistently Perfect
Consistently Perfect
Smarter Together
With the help of the Lennox S40 Smart Thermostat ultra smart thermostat, the SLP99V gas furnace unlocks a world of connectivity. It stays finely tuned to your home by using sensors to react, diagnose, and troubleshoot—all while remaining in constant contact with your dealer to ensure proactive responses. Geofencing technology ensures your air turns on and off as you come and go. And the system even responds to the outdoor environment to adjust operation to account for factors like pollen and outdoor air quality.
Beyond Quiet
Even with all of its impressive power, this furnace is the quietest you can buy and has been engineered to run at variable speed to drastically minimize the sound of air kicking on or off inside the home.
Ratings & Reviews
See what other customers are saying about
SLP99V Variable-Capacity Gas Furnace
3/5
Noisy Fan
October 01, 2024Bought this new furnace while upgrading my AC in August. Haven't run the furnace yet but the variable speed/modulating fan has a whine that is maddening. It sounds like a jet is taking off outside when it speeds up or slow down and can be heard above any sound from the air movement. We read about these units being so quiet that we would not know it wa on .. that is not true. Installer has come back out and replaced the fan motor but that has not helped. I have asked to have Lennox come out and confirm that we should expect this noise in their latest and greatest unit.
Nebraska
Age: 55 - 65
Gender: Male
Reason for Replacement: Planned
5/5
2/5
3/5
3/5
Secondary Heat Exchanger Issue
April 30, 2024I had a SLP99UHV furnace installed 2 1/2 years ago. Found out that the Secondary Heat Exchanger is leaking. Based on its location, the labour involved to replace this Heat Exchanger is time consuming and thereby costly. Lennox will replace the part but the labour costs are my responsibility. Based on what I have read, this appears to be a problem with other people. I spoke to Customer service at Lennox and requested that I speak to someone technical who can answer some basic questions: 1) What can I do from my end to prevent this from happening again - assuming that there are some things I can do from my end? 2) What happens if the Exchanger leaks again? I esssentially want some reassurance that this will not reoccur and that I am not faced with another labour bill (~$1700 C). I got nowhere with that request and was told to chat with the folks who installed the unit. The folks who installed the furnace checked to ensure that the exchanger was installed properly. It was. I am not a person to write these kinds of reports, but I am disappointed because I was reassured that this was a quality product.
Ontario
Age: Over 65`
Gender: Male
Reason for Replacement: Emergency
5/5
Soooo quiet!!!
November 23, 2023Installed this furnace in my last home and will put it in my new home. Most of the time i didn't know it was on, especially when there was other noises in the house. I could here the external condensate pump more often then the furnace. Highly recommend!
Yes, I recommend this product.
Royston BC
Age: 45 to 54
Gender: Male
Reason for Replacement: Planned
5/5
4/5
5/5
Get answers from a Lennox® Dealer.
It's easy to find an expert Lennox Dealer who can help you make the most of your HVAC system.
View Now
Products that add to the performance of SLP99V Variable-Capacity Gas Furnace
- * Based on sound pressure levels during steady-state, high-fire and low-fire operation of Lennox® SLP99UH070XV36B as of March 2020 at mid-point temperature rise and minimum external static pressure when set up per Section 4.4.4 of AHRI 260-2012. Based on AFUE efficiency rating of Lennox SLP99UH090XV60C and leading competitive units listed in AHRI directory as of December 2019. Efficiency ratings established per test standard ANSI/ASHRAE 103-1993.
Proper sizing and installation of equipment is critical to achieve optimal performance. Split system air conditioners and heat pumps (excluding ductless systems) must be matched with appropriate coil components to meet ENERGY STAR criteria. Ask your contractor for details or visit www.energystar.gov.
