G Series

The G4000 is the perfect marriage of size, performance and efficiency for heating a single residence or multiple buildings up to 4000 ft².

Approx. Heating Space*

4,000 sq. ft.

Firebox Volume

93,000 BTU/hr

8 Hour Burn Rate

116 gallons

Water Capacity

8.5 3

Recommended Wood Length

18 – 20”

Firebox Dimensions (L” x W” x H”)

23 x 22 x 29

Firebox Door

20” x 20“

Weight

1,353 lbs

Outlets

1 set of 1" and 1 set 1.5"

Chimney Size

6”

Dimensions*** (L” x W” x H”)

62 x 41 x 79

MSRP

$15,275

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 7,000 ft².

Approx. Heating Space*

7,000 sq. ft.

Firebox Volume

165,000 BTU/hr

8 Hour Burn Rate

232 gallons

Water Capacity

16.5 3

Recommended Wood Length

24"

Firebox Dimensions (L” x W” x H”)

29 x 29 x 34

Firebox Door

20” x 20”

Weight

1,982 lbs

Outlets

1 set of 1" and 1 set 1.5"

Chimney Size

6”

Dimensions*** (L” x W” x H”)

71 x 51.5 x 81

MSRP

$18,975

The G10000 was purposely designed for larger applications and multiple structures. A larger firebox gives greater heating capacity and long burn times for buildings up to 10,000 ft².

Approx. Heating Space*

10,000 sq. ft.

Firebox Volume

230,000 BTU/hr

8 Hour Burn Rate

277 gallons

Water Capacity

24 3

Recommended Wood Length

24"

Firebox Dimensions (L” x W” x H”)

42 x 29 x 34

Firebox Door

20” x 20”

Weight

2,403 lbs

Outlets

2 pairs 1.5"

Chimney Size

6”

Dimensions*** (L” x W” x H”)

83 x 51.5 x 81

MSRP

$21,475

Download the Full Brochure (PDF)

Take a quick video tour of our G Series furnaces.

Rugged and Easy to Use

We know that your time is valuable 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.

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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 409 Stainless Steel is the only product that can provide the right blend of longevity, cost-effectiveness and other critical traits that meet the HeatMaster^SS standard of excellence.

409 Stainless Steel is the best choice for your furnace because:

It resists corrosion. 409 Stainless steel is 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.

HeatMaster^SS 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 HeatMaster^SS standard of excellence.
Heatmaster^ss 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 – HeatMaster^SS furnaces are built to the very highest manufacturing standards.