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 1-5 of 24 reviews

"Frustrated Consumer"

1.0 rating
Very Unsatisfied

We were forced to buy this new technology model as our old boiler required ventilation through a chimney. Our chimney became blocked and we were forced to go with the newer technology. The Lennox Series gwm- 1001e was installed 14 months ago. It has never worked correctly, at one point the whole unit had to be replaced. We have had at least 12 service calls, as suddenly the unit stops heating water. Today, it was a problem with the ignition. We paid $16,000 to have the whole unit installed and I am unbelievably frustrated.

mary carnahan

laurel, md


5.0 rating
Very Satisfied

Love my boiler! It helped my heating bills drop like crazy. They cut in half. This boiler is amazing. It was easily installed and we have had it over 3 years now and knock on wood, we have had no problems. I have heard from several people that Lennox was a good brand and now I am seeing it first hand. You can tell it is very well made in comparison to the other brands. It has so many pros and honestly the only con I can think of is that it is more on the high side of price. As the old saying goes, you get what you pay for. I believe that to be true, most of the time. You pay for quality. My neighbor has had a Lennox boiler like this for a long time (like 30 years) and guess what? It's still kicking! If that doesn't say something, I don't know what does! Try it… you'll love it!


"Great product but a little pricey."

5.0 rating
Very Satisfied

I purchased the Lennox GWM-IE boiler a little over a year ago. The thing I like most about this product is the performance. This unit can consistently provide enough hot water for my entire house without having to wait very long to complete the daily tasks that I need to do. While the upfront cost for the unit was a little expensive the money it has saved me on my gas bill has more than paid for it already. I did experience a slight problem when purchasing it though. The first unit that I purchased and had installed was completely dead on arrival but the company I had purchased it from took care of it right away at no extra charge to me. Overall I would highly recommend this brand of boiler to anyone that asked me my opinion.

Newport Beach California

"Great unit for a small home"

5.0 rating
Very Satisfied

My family and I rent out a home in Charlotte which 3 years ago we renovated and installed new units in. We received recommendations for installing a Lennox unit into the home and decided that after hearing great reviews for this water boiler, it was going to be the unit we would purchase. It has worked outstanding so far, the 3 years it has been on that house, we have never had any problems with it. In fact, our most recent tenants were surprised at how quiet it operated and how it didn't wake them up during their sleep. It is not only extremely efficient compared to other water boilers, but it modulates itself when it runs, meaning that it does not disturb anyone. It is a great unit and has not given any of my tenants any problems. I highly recommend Lennox and this water boiler. The performance and reliability we have gotten out of our unit is amazing.

Charlotte, NC

"My Lennox Boiler"

5.0 rating
Very Satisfied

My Lennox gas boiler is amazing! I bought it for my home last year, and I have never been disappointed by it. It was easy to have it installed. Since I bought this boiler, my heating bills have decreased dramatically. I love how quiet it is as well as its energy efficiency. There's nothing I dislike about this boiler, and I have not had to repair it yet. I would absolutely recommend this brand to everyone I know.

Bouler, CO

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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