Heatmaster G series Outdoor Boilers

RSI Boilers - HeatMaster SS Authorized Dealer

Outdoor Wood Boilers
Parts and Accessories
HeatMaster SS Website
Boiler Delivery


Model G7000 

  • Pricing $14,795  (Qualifies for 26% federal tax credit)

The G7000 was purposely designed for larger applications and multiple structures.  A larger firebox gives greater heating capacity and long burn times for buildings up to 7,000sq ft.

HeatMasterSS G7000 wood burning furnace
  • Approx. Heating Space*7,000 sq. ft. 
  • 8 Hour Burn Rate129,866 BTU/hr 
  • Water Capacity (US Gallons)234 gallons 
  • Firebox Volume16.5 ft3 
  • Recommended Wood Length20-24" 
  • Firebox Dimensions (L” x W” x H”)29" x 29" x 33.5" 
  • Firebox Door20" x 20" 
  • Weight2,035 lbs 
  • Outlets1 sets of 1” and 1 set 1.5" 
  • Chimney Size6” 
  • Dimensions*** (L” x W” x H”)69" x 50" x 83"
*Well-insulated building. **BTU’s are approximate and will vary depending on fuel quality. *** Height of the furnace is to the top of the lift hook

HeatmasterSS is proud of it’s reputation of producing innovative wood heating methods and our G Series wood furnaces are continuing that trend. They operate more efficiently with fewer emissions than other wood furnaces. They can use up to 50% less wood to create the same heat.

How does it do that?

Wood gas is generated in a high temperature reaction (>700° F) between the wood and a limited amount of oxygen. The heat and lack of oxygen “bakes” the wood, causing the gases in the wood to release in the form of carbon monoxide, hydrogen and carbon dioxide.

The wood gas mixture that is created in the firebox then gets forced through the base of the fire along with any ash that would come with it and burned at temperatures around 2000° F in the gasification chamber. This creates a very hot, very clean burn which helps you get the most out of your fuel. After the gas is burned, the heat is transferred to the water jacket using the heat exchange tubes. Normal exit temperatures of the exhaust are 200 – 300 F.
The most notable indicator of effective gasification is the lack of smoke exiting the chimney.
The gasification process creates longer burn times and can reduce wood consumption as much as 50% compared to a standard wood furnace.

What does it mean for you?

  • Less wood cutting
  • Less ash removal
  • Fewer emissions
  • Fewer trips to the furnace
  • Bottom line – more heat for less


Please Contact us for more info or with any questions
Philip Howard / RSI
109 Commercial St / PO box 341
Arlington, WI 53911

Weather Underground PWS KWIARLIN2