Lennox GWM-IE Boilers

Lennox GWM-IE Boiler Overview

The Lennox GWM-IE is a wall-mounted, gas modulating condensing water boiler. It has an efficiency rating of up to 95% AFUE and earned the Energy Star Most Efficient 2014 label. The unit features an electronic ignition control which monitors water temperature and turns on the burner only when necessary, and its sealed combustion design is intended to reduce sound. The stainless steel, finned tube heat exchanger is self-cleaning, while the stainless steel mesh burner is corrosion resistant. A CPVC flue condensate collector offers protection against corrosion and leaking.

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Consumer Reviews of Lennox GWM-IE


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #2 of 6 Lennox Boiler
  • 95.83% of customers recommended

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Lennox GWM-IE Boiler Reviews

Showing 6-10 of 24 reviews

"The boiler I have in my household is the GWM-IE Boiler, a high-efficiency, gas-modulating condensing water boiler."

5.0 rating
Very Satisfied

I have owned this boiler for one year. I purchased it for my home and it cuts my heating bills in half. Very pleased with the overall performance. I like some features of this boiler, such as its efficiency rating of up to 95% AFUE and electric ignition control burns fuel only when necessary which reduces energy costs for my bill. It is an Energy Star qualified machine, which means it meets U.S. federal guidelines for energy efficiency. I do not like the noise it makes when it starts. I also smelled something during its working period, but this is really not a big issue for me at least. I did not have any negative issue with this boiler until today. I do not have to repair or replace it right now. If this boiler retires, I would buy the same brand again, based on its current performances. I also would like to recommend it to a friend of mine.

Baltimore, MD

"Lenox Home Boiler Review"

5.0 rating
Very Satisfied

The Lennox GWM-IE home (residential) boiler is an excellent alternative. My boiler is less than a year old. I looked at several boilers before settling on this one. The installation (I had a professional install it) was quick and painless. They worked with my time frame so that I was not inconvenienced. This has an efficiency rating of 95 which I truly love! This really lowers my utilities bills and my budget loves that! It is gas modulating, so that saves money. It is quiet and I have not had any problems yet. I would recommend this to a friend or family member. Overall, there is nothing that I dislike about the Lennox GWM-IE home / residential boiler. It is well worth the up front cost!

Atlanta, GA

"Great boiler for a Nice price!"

5.0 rating
Very Satisfied

I have had it around 5 months. As I am remodeling a house, I had to buy multiple different items and I love this boiler, it works fast at heating the water. I don't think there is any negative other than it was a bit difficult to hook up, and I haven't had to replace it at all. I will buy Lennox again and I am already pricing one for the next house. I have recommended it to friends as well.

Gainesville, FL

"My GWM boiler is amazing!"

5.0 rating
Very Satisfied

My Lennox brand GWM boiler is amazing. It is gas powered so that means it's very kind to my pocket and this is not to mention its incredible efficiency. It is also self modulating and can power up at any rate I want, which is great if you have kids.

Austin, TX

"Love My Boiler More Than My Cat"

5.0 rating
Very Satisfied

I moved into my current place 4 ' years ago. I had never lived in a place with a boiler system in place before. I won't lie, I was apprehensive at first. Coming from Ohio I'd always used more… conventional, I guess, systems of heating my home. When I first heard that this ran with the aid of water I was concerned about its effectiveness. That has not been a problem. In the whole time I have lived here this has been a great heating system. In the winters when I get kind of cold and turn it up, my energy bills still stay very modest. Better yet, this is a super reliable system. I haven't had to ask the landlord about repairs or updating of the system a single time. When I move into a permanent residence I will certainly keep an eye on Lennox boilers as a cost saving, energy efficient means of heating my place.

Pensacola, FL

Other GWM-IE Reviews

There are very few online reviews regarding the GWM-IE on HVAC forums. In reply to a consumer asking about the GWM-IE on hvac-talk.com, several professionals said they preferred other brands, with most mentioning a similar model by Weil-McLain. It was also mentioned repeatedly that installation matters more than the brand or model.

GWM-IE Warranty

Product registration is required within 60 days of installation for maximum warranty coverage. The warranty for the Lennox GWM-IE boiler is comprised of the following:

  • 15-year limited warranty on the heat exchanger
  • 10-year limited warranty on remaining covered components

Labor costs are not covered by the warranty.

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