Aqua-Therm Wood Furnaces

Everything you need on Aqua-Therm Wood Furnaces, including model details, industry rankings and customer reviews, all in one place.

Aqua-Therm Wood Furnace Overview

Aqua-Therm, LLC manufactures and sells renewable fuel boilers, including wood and coal boilers, for residential and light commercial applications. Aqua-Therm is a private company and is headquartered in New London, MN.

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Consumer Reviews of Aqua-Therm


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #9 of 37 Wood Furnaces
  • 60% of customers recommended

Corporate History

Aqua-Therm was founded in 1983 and based in Brooten, Minnesota. The company recently moved to New London, MN. The company markets its products, including boilers, boiler accessories, and in-floor radiant heating accessories, through dealers in North America. In Febuary, 2016, Aqua-Therm became the strategic partner of Wood Boiler, LLC.

Product Lines

Aqua-Therm’s line of four boilers includes the Blaze HE wood boiler, which is EPA Phase II qualified and which the company states is its newest and most efficient boiler; the E4 gasification outdoor wood boiler; the coal burning Coal-One boiler; and the Eco-One, designed for commercial use.

An outdoor pellet boiler, the Easy 35, will be available soon, according to the company’s website.


Aqua-Therm provides a limited Lifetime warranty on wood/coal burning boilers, with a 5-year replacement warranty on defective units. The Lifetime warranty is pro-rated after 5 years. Components such as grates and fans have a 1-year warranty. Owner’s registration card must be completed and returned to Aqua-Therm within 30 days of purchase for warranty to be in effect.

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Aqua-Therm Wood Furnace Reviews

Showing 1-5 of 10 reviews

"Bad service"

1.0 rating
Very Unsatisfied

Bought my boiler at the end of May. Was to be delivered two weeks later. Now, four months later, I had to drive 400 miles to pick it up. I was told all parts were inside the boiler. I got home with the boiler and half the parts are missing. Can't get them to answer any phone calls or return any. Like the product, but would never buy from the gal in Minnesota again.

Mr. Klein


"Customer service"

1.0 rating
Very Unsatisfied

I had a blower go out. Ordered it and they didn't even have it in Stock but let me order it online. It took a week to get and my wife picked it up. When she picked it up they charged us again. They have serious operations problems with in this company.

William Garceau

"Satisfied after 10 years"

5.0 rating
Very Satisfied

We have heated our two story 50+ year old farm house in Central Wisconsin with an unsheltered Aquatherm wood furnace in our detached wood- framed uninsured garage for ten years. We also have a fuel oil furnace. I am in the process of replacing the blower for the first time, last season it developed a rattle & didn't blow as it had been. The rubber on the damper/flapper thing wore out the previous year & used all weather tape to keep it in place & working until I got a replacement part. We have had to have water added to the coolant lines when we noticed boiler pressure was low, it is important to monitor your boiler temperature & pressure gauge, once you get experience knowing what is normal you will generally be able to problem solve when the furnace isn't heating properly. We have good service techs when needed. We have only called on them a few times in ten years, sometimes they give do-it-yourself advice over the phone if it is a relatively easy/safe fix.


Marshfield, WI

"Very unsatisfied with dealer"

4.0 rating
Somewhat Satisfied

Very very disappointed with the dealer. Our boiler had a leak during the warranty period and I did all that the dealer required me to do and got all information and photos she wanted and still 7 months later have not received any refund on my repairs. Very poor business relationship I would say. The boiler is an ok boiler but wished we had purchased a different brand for sure. Good luck to anyone else who purchases an Aqua-Therm

John Butler

Deposit, NY

"Great boiler"

5.0 rating
Very Satisfied

I have an Aqua-Therm 145 unsheltered boiler. I have it installed in my 40 x 60 shed. I use it to heat a 4500 square foot home. It keeps my shed at 45 and I have my home at 72 degrees. I am very satisfied with the boiler and would get another one in a heartbeat. I have never had a problem with any part of the Aqua-Therm.

Jerry Schilling

Lennox, SD

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