The G4000 is great for heating most family homes, along with a garage or another small secondary building, up to 4,000 sq. ft.
| Approx. Heating Space | 4,000 sq ft |
| 8-hr Burn Rate | 68,025 BTU/hr |
| Water Capacity | 116 gallons |
| Firebox (L x W x H) | 23” x 22” x 29” |
| Firebox Door | 20” x 20” |
| Weight | 1,448 lbs |
| Outlets | 1 Set 1″, 1 set 1.5” |
| Power Supply | 120V 1PH 60 HZ |
| Running Load | 2.5 Amps |
| Chimney Size | 6” |
| Dimensions (L x W x H) | 59” x 42” x 81” |
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The G7000 is often used by families heating large homes and secondary outbuilding, such as barns or shops, up to 7,000 sq. ft.
| Approx. Heating Space | 7,000 sq ft |
| 8-hr Burn Rate | 129,866 BTU/hr |
| Water Capacity | 234 gallons |
| Firebox (L x W x H) | 29” x 29” x 33.5” |
| Firebox Door | 20” x 20” |
| Weight | 2,035 lbs |
| Outlets | 1 Set 1″ 1 set 1.5” |
| Power Supply | 120V 1PH 60 HZ |
| Running Load | 2.5 Amps |
| Chimney Size | 6” |
| Dimensions (L x W x H) | 69” x 50” x 84.5” |
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The G10000 offers flexibility for heating multiple homes or large commercial spaces up to 10,000 sq. ft.
| Approx. Heating Space | 10,000 sq ft |
| 8-hr Burn Rate | 194,946 BTU/hr |
| Water Capacity | 274 gallons |
| Firebox (L x W x H) | 42” x 29” x 33.5” |
| Firebox Door | 20” x 20” |
| Weight | 2,564 lbs |
| Outlets | 2 sets 1.5” |
| Power Supply | 120V 1PH 60 HZ |
| Running Load | 2.5 Amps |
| Chimney Size | 6” |
| Dimensions (L x W x H) | 81” x 50 x 84.5” |
Take a quick video tour of our G Series furnaces.
Rugged and Easy to Use
We appreciate that your time is precious so convenience is a top priority for our G Series furnaces.
- Less cleaning and maintenance: The Easy Clean handle makes cleaning the heat exchange tubes a breeze. No brushing tubes or scraping creosote.
- Stay clean while loading: The Smokeless Loading handle lets you enjoy clean, easy loading. Just pull the handle before opening the door to eliminate smoke coming out at you while loading.
- Less wood cutting: These high efficiency furnaces use up to 50% less wood than conventional furnaces, saving you time cutting and loading wood and cleaning ash.
- Indoors and outdoors: G Series furnaces are safe and clean enough to be installed in a garage, shop or outbuilding.
409 Stainless Steel - The Best Material
We combine the best materials with expert engineering to create the most rugged, longest lasting furnaces available. Titanium enhanced, corrosion resistant Stainless Steel is the only product that can provide the right blend of longevity, cost-effectiveness and other critical traits that meet the HeatMasterSS standard of excellence.
Titanium enhanced Stainless Steel is the best choice for your furnace because:
- It resists corrosion. It’s coated with a chromium film so it will not corrode from:
- wet ashes or creosote in your firebox
- sweating on your water jacket
- corrosive elements in your water
- It can withstand higher continuous temperatures.
- It transfers more heat. Heat gets to your water at a higher rate which will save you on fuel.
- It has a low Thermal Expansion Rate. It won’t crack and warp in a high heat environment.
HeatMasterSS furnaces are built to the very highest standards with ISO 9001 Certified manufacturing processes.
The Highest Efficiency
Wood Gasification
Wood gasification is the most efficient process available for wood burning. 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 be released.
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
Additional Features
- 409 Stainless Steel – Titanium enhanced and corrosion resistant, it is the only product that can provide the right blend of longevity, heat transfer and other critical traits that meet the HeatMasterSS standard of excellence.
- Heatmasterss warranty – We back each furnace with our best-in-industry Lifetime Limited Warranty which is twice as long as the leading mild steel competitor.
- Easy access hinged rear door – The insulated rear door is built with a unique hinge design which allows for easy access to the rear of the furnace and quick and easy removal of the door if required without the use of tools or hardware.
- EPA Certified – We exceed government regulations by over 75%.
- Safe easy-to-use dual firebox door latch – Our carefully designed latch catches the door so it doesn’t swing completely open and expose the user to excessive heat.
- Heavy duty multi-layer insulation
- Powder coat finish
- ISO 9001 Certified – HeatMasterSS furnaces are built to the very highest manufacturing standards.