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The in G Series Stands for Gasification.
Harnessing the power of gasification, the G Series is cleaner, more powerful, and uses up to 50% less wood than conventional outdoor furnaces, all while providing incredible wood heat to your home.
50% Less Wood: Load less often and burn less wood than conventional boilers with a G Series.
Eliminate Your Heating Bill: Gasification burns wood at higher temperatures resulting in less creosote build up.
Highest Efficiency Rating: The G10000 is rated the most efficient boiler in North America by the EPA.
How Does Gasification Work in The G Series Outdoor Furnace?
Maximize Your Fuel: Airflow to the top and bottom burn chambers is controlled independently with dual modulating dampers. An oxygen sensor optimizes the flow of air into the Tornado Combustion Chamber resulting in the cleanest and most efficient burn available.
Complete Combustion: Complete combustion is achieved as the oxygen and wood gasses swirl in tight spirals within the Tornado Combustion Chamber. Peak temperatures are maintained thanks to the mass of the refractory, and the chamber's double pass allows enough time to burn all available fuel.
High-Efficiency Heat Exchange Tubes: Heat exchange tubes with spiral turbulators transfer the maximum amount of heat to your water jacket, ensuring every available BTU can be used.
How Does An Outdoor Furnace Heat Your Home?
Rural homes, garages, and outbuildings are notoriously expensive to heat and fuel costs continue to fluctuate dramatically each year, making each winter hard to budget for. Stop relying on the grid, achieve energy independence and eliminate your heating bill forever.
Easily Connects to Your Existing Heating System: The outdoor boiler hooks up to your current heating system without major changes, working with what you already have.
Unlimited Hot Water: The G Series provides a continuous supply of hot water for your home, so you'll never run out.
Heat Multiple Buildings: A single G Series can heat your home, garage, outbuildings, hot tub, driveway and more.
The G4000 is a great option for heating most family homes along with a garage or another small secondary outbuilding, up to ~4,000 Sq. ft.
G4000 Specifications
| Approx. Heating Space 1 | 4,000 Sq. ft. |
| 8-Hour Burn Rate 2 | 68,025 BTU/hr |
| Water Capacity | 116 Gallons |
| Firebox Volume | 8.5 ft 3 |
| Recommended Wood Length | 18” – 20″ |
| Firebox Dimensions | 23″ L x 22″ W x 29” H |
| Firebox Door | 20″ W x 20″ H |
| Weight | 1,448 Lbs |
| Outlets | 1 set of 1” + 1 set 1.5″ |
| Chimney Size | 6” |
| Dimensions 4 | 59″ L x 42″ W x 81″ H |
| MSRP 4 | $13,195 USD |
The G7000 is often used by families that heat large homes and secondary outbuildings, such as barns or shops.
G7000 Specifications
| Approx. Heating Space 1 | 7,000 Sq. ft. |
| 8-Hour Burn Rate 2 | 129,866 BTU/hr |
| Water Capacity | 234 Gallons |
| Firebox Volume | 16.5 ft 3 |
| Recommended Wood Length | 20” – 24″ |
| Firebox Dimensions | 29″ L x 29″ W x 33.5” H |
| Firebox Door | 20″ W x 20″ H |
| Weight | 2,035 Lbs |
| Outlets | 1 set of 1” + 1 set 1.5″ |
| Chimney Size | 6” |
| Dimensions 4 | 69″ L x 50″ W x 84.5″ H |
| MSRP 4 | $15,595 USD |
The G10000 offers flexibility for heating multiple homes or large commercial spaces, making it a versatile option.
G10000 Specifications
| Approx. Heating Space 1 | 10,000 Sq. ft. |
| 8-Hour Burn Rate 2 | 194,946 BTU/hr |
| Water Capacity | 274 Gallons |
| Firebox Volume | 23.6 ft 3 |
| Recommended Wood Length | 20” – 24″ |
| Firebox Dimensions | 42″ L x 29″ W x 33.5” H |
| Firebox Door | 20″ W x 20″ H |
| Weight | 2,564 Lbs |
| Outlets | 2 sets 1.5″ |
| Chimney Size | 6” |
| Dimensions 4 | 81″ L x 50″ W x 84.5″ H |
| MSRP 4 | $18,895 USD |
Backed for Life
The Strongest Coverage in the Industry
When we say Limited Lifetime Warranty, we mean it. At HeatMasterss, we don’t just offer the strongest coverage in the industry we actually stand by it. Our furnaces are built with unmatched quality and craftsmanship, and we’re confident enough to back them for life. That means real support, real protection, and absolute peace of mind for you and your family.
Quality Outdoor Furnaces Truly
Designed for Rural Living:
Efficiency Rating
While the G10000 is definitively the most efficient boiler on the market, the whole G Series line up compares well against all other brands.
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Smokeless Loading
The G Series is the only unit with a vacuum like system, sucking the smoke away from you while loading.
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Easy Clean Handle
Year after year, the G Series is widely regarded as the easiest boiler to clean and maintain.
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409 Titanium Stainless Steel Firebox
The G Series uses 409 Titanium Stainless Steel for the entire firebox, ensuring no leaks overtime due to rust.
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Limited Lifetime Warranty
When you buy a boiler, you want it to last. HeatMaster continues to have the best warranty in the business across all key components to ensure peace of mind for years to come.
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FAQs
What does it look like to maintain a furnace?
- As with most things, when you take care of your boiler, it’ll last much longer. Maintenance is essential in making sure your boiler keeps your family warm for years to come.
- Daily maintenance looks like inspecting for normal creosote buildup, monitoring the water level, and cleaning the heat exchange tubes. Make sure all doors are sealed properly, and your smoke-bypass is closed!
- Weekly, simply remove ash from the lower combustion chamber and dispose of it safely.
- Monthly, inspect the air inlet for creosote buildup, ensure the ash bed in the firebox is no more than 6-8 inches deep, and check the fan motor and wheel for creosote buildup.
- Seasonally, when the furnace is not in use, remove all ashes and creosote, inspect gasket seals, replace if needed, cover the chimney, and slightly open the bottom door to reduce condensation.
What does support look like after installation?
- Our team of expert dealers are knowledgeable and will provide guidance and support when you need a hand. Customers can also easily contact our head office through our website.
- We get lots of questions around families first winter with a boiler. To support you as you’re getting started, we offer a collection of videos and documents to help you learn the in’s and out’s of your boiler.
- Your boiler is designed to last. HeatMaster(ss) offers strong warranty, widely recognized as the best in the industry. If anything happens, we’ve got your back.
Will I have to make tweaks to how it runs?
- Our boilers are designed to run smoothly “out of the box”. Our factory settings are tested and designed to work for pretty much any scenario.
- Your boiler is designed to automatically adjust to your specific climate, altitude, and the type of wood you’re using, ensuring optimal performance without the need for any manual adjustments.
- If you want to tinker, or through the help of your dealer, you can make further tweaks to fine-tune the settings according to your desired preferences.
How long will it take for me to pay off the unit?
- If you’re coming from electricity, propane, or heating oil, this can be a critical deciding factor. The G10000 is rated the most efficient boiler in North America by the EPA, so if you’re in the right place. The short answer: “It depends”. Your current heating bill and the insulation rating of your home will be large factors. The average household moving from propane or heating oil typically pays off their unit in around 5-7 years, but we’ve also seen it happen way faster!
Does it matter if I use wet or unseasoned wood?
- Yes, the moisture content of the wood will impact the performance of your boiler. Seasoning your wood means to stack the wood in a way that allows air to circulate around it, usually outdoors in a sunny, well-ventilated area, for a period of 6 months to a year.
- Gasification boilers need seasoned wood to perform at their best. Wood with high moisture levels produce more creosote, which can accumulate and clog your unit over time, leading to various issues.
- To prevent this, use seasoned wood that has been properly dried and has low moisture levels.
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