Hawken Energy GX Wood Furnaces

Hawken GX Wood Furnace Overview

The Hawken Energy GX is a high efficiency, low emission outdoor hydronic wood furnace. The GX has a water capacity ranging from 107 gallons to 351 gallons and a heat capacity ranging from 144,000 maximum BTU to 248,000 maximum BTU. The GX uses Afterburner technology, a secondary burn chamber which allows the furnace to use 40% less wood and reduces emissions by over 90% compared to traditional furnaces, according to the manufacturer. Its large cast iron door is insulated for maximum efficiency and designed for easy loading. Units come in a standard green color but select models are available in a variety of colors, including camo. The 2015 starting price of the GX furnace is $6,489 plus shipping and installation. Financing is available.

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Consumer Reviews of Hawken GX


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #2 of 3 Hawken Wood Furnace
  • 36.84% of customers recommended

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Hawken GX Wood Furnace Reviews

Showing 11-15 of 19 reviews

"GX10 the nightmare continues"

1.0 rating
Very Unsatisfied

I was sold this unit in June of 2012. It was intended to heat my 1950 square foot home; heat, domestic hot water, our 30,000 gallon in-ground pool, and a 12×30 tack room in the horse barn. The Hawken dealer said it was perfect for the job. Since this firm had performed two large hvac projects at our business I never thought to question them. The unit was never able to meet the demand, simplu not enough BYU'S. Nearly three years later we are finally getting our day in court. Neither the dealer nor Hawken would simply admit that I was sold the wrong product for the job intended. Going for triple damages since they have been so difficult; I will let you know in 2 weeks how it pans out.


Rome, NY

"Hawken's GX10"

5.0 rating
Very Satisfied

I installed the gx10 in April of 2013. I fired it up in late May to heat my hot water. It works very well and we never run out of hot water. This is our first winter heating our 1600 square foot home and 1600 square foot basement. We had the heat set at 75 and it was never cold. The only thing you need to do is clean the wood burner every week. It does get a lot of dust in the tubs. If you keep it clean it will heat your water fast. Ours turns on at 170 and off at 180. Only need to load wood in the morning and it's good to the next morning. I've only used about 6 face cords to do all of this for about 10 months. I've used zero gallons of propane for heat or hot water.

D. Smith

Emmett, MI

"Hawken's GX10"

5.0 rating
Very Satisfied

I am on my 4th year with a gx10 in central Indiana. The first year was dismal; burned too much wood, smoking badly, no heat. I found out that I was not cleaning the unit often enough. Once a month or every other month is way too long to go with a gx10. At the end of the first year, most of the tubes were clogged and it took a representative from Hawken and I approximately 6 hours to clean out the unit. He was here on a free upgrade to my unit. Since then, I have cleaned it out every 2-3 weeks during the heating season and have had no problems. You must burn only dry wood in the gx10 and must keep it clean. I now have a regular kit put together and the cleaning process is down to about 30 minutes. I am heating 4200 square feet of log home and saving about $1000 a year on heating costs.

A. Carter



1.0 rating
Very Unsatisfied

I purchased my Hawken gx10 in March. I didn't receive it until August. The dealer sent a guy to hook it up and all the fittings leaked. He said he doesn't believe in plumber's tape. Upon first starting it up, the sensor was bad and indicated a low water level. That was replaced. I have run the stove for a month now and gone through an entire cord of wood, and the outside temperature hasn't hit below 40 degrees. I found out that a firebrick in the back had shifted, causing fire to melt the insulation and gasket in the back of the burn box, which then melted my circulator pump and electrical wires in the back of the unit. I have a brush stuck in the gas chambers. My house will not heat above 70 degrees (keep in mind it's still 40 degrees outside) and I can not go longer than 8 hours on a full stove. I hate this unit.

kevin nichols


"Buy something else, anything else, from anybody but Hawken"

1.0 rating
Very Unsatisfied

This unit started out great and within a month turned horribly bad. First, it is prone – and I mean seriously prone – to getting clogged with creosote. The heat exchanging tubes are small in diameter, which allows for the creosote to build up quickly. Cleaning with the provided tools is next to impossible. Second, the customer service is just about non- existent. I called many times, looking for direction on why it wasn't working, and would get a short answer, usually amounting to gee, we've never heard that (even though there are a lot of reviews saying the same thing). At one point they sent me new bricks to expand the air opening, but with no directions on how to actually replace them. All in all, find something else. UPDATE – 1/23/15: The folks there, Warren especially, are nice enough, but that doesn't help heat the house. He read my earlier review and had someone from his company reach out to me to discuss my troubles with the unit. I spent some time describing my creosote issues with him, and of course I received the obligatory "we want you to be satisfied" conversation. They sent me some aluminum strips to help clean out the vertical tubes, after a short "back ordered" period, along with a new 1.5 inch brush. I'll say this, when the unit is clean it works well, but you would either have to 1) only burn kiln dried wood (the wood I am burning is over 2 yrs old and has been covered the whole time but still not "seasoned" enough since I still have horrible creosote problems) 2) clean it bi-weekly which is fairly time consuming; I clean it once every two weeks and it's always very full of tar-like creosote, or 3) burn way more tsp with it than I am, I guess. My temperaturess stay above 170 until it gets really cold, then it will start to fall into the mid 160's, more demand. I still have my oil furnace on and it kicks on to help meet the heating/hotwater demand, so I'm not using the GX10 exclusively. All of the things they have told me are or could be the causes, don't seem to be the case. After getting it really clean about 2 months ago, I sent them an email saying I needed my brush replaced. I didn't expect it to be for free, but I got an email back saying it would be sent right away. Two months later, and I sent another email and got an email reply back that I should have received it. Overall, the work behind keeping it clean really doesn't seem to be worth it for me. When I think of what I paid to purchase and install it, I really wish I would have found something else. There is one solution to this and frankly the only thing that would make me a satisfied customer (and if this happened I would publish another review saying so) and that is if Hawken Energy had one of their folks come out and clean and service my unit and show me exactly what I'm doing wrong. I have followed their suggestions and instructions and still I am having problems, and I know I'm not the only one. I would just like Hawken to stand by their product in deed, not just in word.

Ron England

Moscow, PA

Other GX Reviews

There are very few online comments regarding the GX. A consumer on arboristsite.com asked for information about the GX and almost everyone who responded stated that they didn't know much about the unit.

GX Warranty

The warranty for the Hawken Energy GX wood furnace is comprised of the following:

  • 20-year warranty on parts
  • 20-year firebox guarantee against corrosion, pro-rated after the 5th year
  • 1-year warranty on electrical components

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