Lennox SLP98 Gas Furnace Review

How would you like to have a new gas furnace that has variable-capacity and performs like the cruise control on a high performance vehicle?  You can have this with the  new Lennox SLP98 Furnace, just one of the new 2011 furnaces included in the Dave Lennox Signature Collection.

According to Lennox, this furnace has an efficiency rating of 98.2% that could save you up to $800 a year on your energy costs when compared to a standard furnace.  This furnace comes installed with an icomfort Touch Programmable Thermostat that constantly exchanges information with the unit and will make adjustments so your system is optimized for performance and efficiency.

In addition,  this system has SilentComfort technology that offers consistent heating and is seven times more quiet than other competitive gas furnaces.  Along with SilentComfort technology, this unit also boasts a Precise Comfort Technology that will adjust the heat, airflow capacity and fan speed is extremely small increments to you will have temperatures that are controlled precisely.

Do you own a Lennox SLP98 Furnace? If so, please write a review of your system, and tell us how you like it.

User Ratings for this Gas Furnace

Overall Rating4.54.54.54.54.5
Reliability Rating4.54.54.54.54.5
Operating Cost Rating4.54.54.54.54.5
Features & Value4.54.54.54.54.5
Warranty & Support4.254.254.254.254.25

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Reviews and Ratings

6 Responses to “Lennox SLP98 Gas Furnace Review”
  1. steve says:

    might buy one tomorrow, with a good quality central air (xc16)unit with dual speeds, elector static filter, 3 year maint. plan included, price through Costco is 11,290.00 too much???????????????

  2. Sandy says:

    Just installed furnace two weeks ago. It is much louder than my 30 year old GE furnace that got replaced. You can hear it go on to low speed then high speed. Sometimes it is quiet but not when it is working hard. It sounds like there is a loud portable air cleaner in the bedroom with me.

    After 4-6 weeks I will compare gas usage to last year. That will be the real test.

  3. Jon says:

    I replaced my 20 year old Lennox Whisper Quiet with the SLP98UH this week. I cannot yet rate long term reliability or operating cost but this furnace works as advertised as far as eliminating cold and hot spots in the house. Amazing! I am a little dissapointed that my dealer did not supply the iComfort WiFi thermostat but I’m not sure how much I would use it anyway.

    I was a bit surprised to see the intake and exhaust flue is mounted on the side of the house rather than vertically to the roof but it makes a lot more sense having a short flue run, and the outside vent looks great next to our dryer vent.

    All in all I am very happy with this unit, albeit a bit pricey but I wouldn’t have anything but a Lennox.

  4. John Maracek says:

    We bought a Lennox SLP98UH series variable capacity gas furnace December 2011. In the past 2 years, we have had 3 service calls for having no heating. This was the top of the line Lennox model, so it was very expensive. The problem was intermittent so the error codes do not help unless the tech actually is there when the problem is present. First they replaced the Pressure Switch (apparently they are having recurring problems with these so that is the first thing they replace). Then the next time they ordered a new igniter (thinking that it was not firing). Finally a tech was present when the problem was existing and checked the gas supply and found the real problem – variable capacity gas solenoid valve was not opening. When they finally replaced the variable capacity gas solenoid valve assembly, it works fine now.
    I still like the unit based on efficiency and quietness, but there may be a problematic issue with the variable capacity gas solenoid valve assembly – Lennox needs to evaluate for possible recall issue.

  5. Greg Carson says:

    Best furnace ever! My home has never been more comfortable! Proper installation and set up is the key.
    I have had this furnace running in my home since October 2013 with no problems or issues.
    The Icomfort Thermostat is very easy to use and set different programming.
    I upgraded from a single stage 92% furnace and still saved money on heating!
    The variable capacity output never overheats or underheats the house. Comfort is constant from mild temps to the bitter frozen cold weather (40 F to -40F!).
    Highly recommend this furnace to anyone who wants the best comfort and product. Just make sure that the heating contractor you use is very reputable and knows how to install these properly!