HeatMaster G Series Wood Furnaces

HeatMaster G Series Wood Furnace Overview

The HeatMaster G Series is a gasification wood furnace approved for indoor and outdoor installation. The gasification process reduces wood consumption, and its low maintenance design allows easy loading and cleaning. It is available in water capacities of 100, 195 and 250 gallons and a heating capacity of up to 350,000 BTU. The unit is constructed of 409 stainless steel for greater heat transfer and tolerance and features heavy duty multi-layer insulation. An insulated hinged rear door provides easy access to the rear of the furnace, and a dual firebox door latch is designed for safety. The 2016 starting price of the G Series wood furnace is $8,495.00.

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Consumer Reviews of HeatMaster G Series


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #2 of 4 HeatMaster Wood Furnace
  • 91.89% of customers recommended

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HeatMaster G Series Wood Furnace Reviews

Showing 31-35 of 37 reviews

"Upgrade from an old Sequoyah"

5.0 rating
Very Satisfied

Upgrade from an old Sequoyah. Heating and hot water for two homes a 5000 sf farm house and a 2000 sf light home. She cranks once you get the hang of what to feed her. She burn green with little smoke if you through in a few dry pine logs.


Western Maine

"New G-200"

5.0 rating
Very Satisfied

While its still early to review. So far we very happy with the machine. Burns very clean and seems pretty efficient, although its very early still.

John Schieferstein


"Great boiler!"

5.0 rating
Very Satisfied

Installed our Heatmaster SS G-200 this year and so far we love it. It's heating our 1840 un-insulated house easily at 70 degrees. Wood consumption is fair and no smoke. More hot water than you could ever use. Wish they were a little less costly so more people could afford one.

A. Walters

Westport, MA

"Heatmaster G200"

5.0 rating
Very Satisfied

I bought this Outdoor Gassification Wood Boiler to replace a 25 year old Hardy H4 model conventional outdoor wood boiler. I live in New Hampshire and was using between 12-14 cords per 6 months of heating season. So far I have cut my wood usage down to just over 1 cord per month which will bring me to about 7.5 cords per 6 month heating season. I have had no issues with the boiler so far. Once a coal bed of 2-4 inches is established I just load the amount of wood I think that I will need to get me to the next loading (typically 12 hours). My wood moisture is between 20-25%. I have not yet cleaned any ashes from the primary burn chamber after 4 cords of wood. I rake out the ashes from the Secondary reaction chamber after each cord of burning and remove approximately 3 spade shovel fulls of ash.

J Sinclair

Canterbury, NH

"G 200"

5.0 rating
Very Satisfied

In full disclosure, I am a HeatMaster distributor! I have been selling, servicing and installing outdoor wood boilers now for over 10 years. I have worked with many different outdoor wood boiler products over the years and the G series is in my opinion top of the line! We are certainly not perfect but what attracted me to HeatMaster in the first place was the way that the company took care of any issues in the field, I have seen it first hand as I do service work on all types of outdoor wood boilers. This unit is the easiest wood gassifier to operate, service, clean and maintain on the market. The fact that it is 409 stainless construction at first had me concerned but after seeing several brands built from mild steel corrode through and leak in less than 2 seasons, I took the trip to the factory to watch it be built. They opened up anything I asked to see and I was very impressed at the quality control care taken in the building process. After picking through the process over a 3 day visit, I decided to come on board with HeatMaster, Great product, fair pricing, Awesome people and an honest warranty! If you are in the market for an outdoor wood boiler, this is top of the line! Please feel free to contact me directly at ([email protected] ) if you have any questions regarding the G Series boilers from HeatMaster.

Richard Emmons

Lyman, ME

Other G Series Reviews

Online comments regarding the G Series seem to be mostly positive. Most responses to a homeowner on outdoorwoodfurnaceinfo.com who was thinking of buying one were very positive and said that it is a great unit, though a couple did mention that gasification units require more care than conventional units.

G Series Warranty

The warranty for the HeatMaster G Series wood furnace is comprised of the following:

  • Lifetime Limited Workmanship and Corrosion Warranty

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