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Ok, you’re researching wood boilers and there are a few options out there. If you’re reading this you know that HeatMaster boilers have one of the longest warranties (20 years) in the business, are sold and supported by knowledgeable local dealers and they’ve been made in Canada for over 20 years.

Now it’s time to decide which way to go…. G Series or MF Series.

When it comes to deciding if the G Series (gasification furnace  / down draft) or MF Series (conventional furnace / updraft) which HeatMaster wood boiler is right for you there are three things to look at:

1.) Will your fuel be seasoned (20% internal moisture content or less) or semi seasoned? 

If you answered seasoned then the G Series is the way to go. If your wood is going to be on the semi seasoned side or you might not always have the time to split your firewood then the MF Series is the way to go.

2.) Do you want to spend money or time? 

While the MF Series is a bit cheaper in terms of purchase price per BTU created it will also use more fuel than the G Series. If you have lots of fuel, the time and / or people power to get it to the boiler and load the boiler then go with the MF Series. If you would rather spend a bit more money up front but less time working with wood then look seriously at the G Series.

3.) Do you want to “fire and forget” or “work smarter, not harder”?

Any gasification boiler requires a bit more interaction from the operator vs. a conventional boiler. Ensuring your wood is seasoned, stacking it in the boiler and ensuring you clean out the ash regularly are all “must do”s” to have your G Series operate at peek efficiency.

MF5000
G series

G Series

The HeatMaster G Series (G stands for gasification) wood boiler is the way to go if you want more heat with less work. Gasification basically means you are using every BTU available from your fuel by burning any smoke that is created (smoke is unburnt fuel). More information on gasification below:

https://heatmasterss.com/2020/11/18/wood-gasification/

If your fuel is seasoned (20% internal moisture content or less) then the G Series is for you. 

More information on the HeatMaster G Series line of wood boilers below:

https://heatmasterss.com/our-products/g-series/

There are currently 3 models of the G Series available:


G4000
– rated for approximately 4000 square feet of well insulated building

G7000 – rated for approximately 7000 square feet of well insulated building

G10000 – rated for approximately 10,000 square feet of well insulated building

MF Series

If you want to throw in whole, unsplit logs and not season your fuel then the MF Series is the way to go.

When looking at the MF Series there are 5 models available

MF3000e – rated for approximately 3000 square feet of well insulated building

MF5000e  – rated for approximately 5000 square feet of well insulated building

MF7000e  – rated for approximately 7000 square feet of well insulated building

MF10000e  – rated for approximately 10,000 square feet of well insulated building

MF20000e – rated for approximately 7000 square feet of well insulated building

G Series Specifications

G4000

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
10,995

G7000

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
13,995

G10,000

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
15,995

*Well-insulated house. *** Height of the furnace is to the top of the fill tube

Mf eSERIES Specifications

MF 3000e

Approx. Heating Space*
3,000 sq. ft.
Maximum BTU’s**
150,000/hr
Water Capacity (US gallons)
60
Firebox (L” x W” x H”)
28 x 24 x 32
Firebox Door (L” x W” x H”)
16 x 18
Weight (lbs)
950
Outlets
1 set of 1” feed and return
Chimney Size
6"
Dimensions*** (L” x W” x H”)
52 x 36 x 78
MSRP
6,995

MF 5000e

Approx. Heating Space*
5,000sq. ft.
Maximum BTU’s**
250,000/hr
Water Capacity (US gallons)
125
Firebox (L” x W” x H”)
34 x 31 x 38
Firebox Door (L” x W” x H”)
20 x 20
Weight (lbs)
1,300
Outlets
2 sets of 1” feeds and returns
Chimney Size
6"
Dimensions*** (L” x W” x H”)
56 x 49 x 84
MSRP
9,795

MF 7000e

Approx. Heating Space*
7,500sq. ft.
Maximum BTU’s**
375,000/hr
Water Capacity (US gallons)
180
Firebox (L” x W” x H”)
46 x 34 x 40
Firebox Door (L” x W” x H”)
24 x 24
Weight (lbs)
1,700
Outlets
2 sets of 1” feeds and returns
Chimney Size
6"
Dimensions*** (L” x W” x H”)
69 x 49 x 89
MSRP
10,795

MF 10000e

Approx. Heating Space*
10,000sq. ft.
Maximum BTU’s**
500,000/hr
Water Capacity (US gallons)
230
Firebox (L” x W” x H”)
56 x 34 x 42
Firebox Door (L” x W” x H”)
24 x 24
Weight (lbs)
2,000
Outlets
2 sets of 1.5” feeds and returns
Chimney Size
8"
Dimensions*** (L” x W” x H”)
81 x 51 x 93
MSRP
12,345

MF 20000e

Approx. Heating Space*
20,000sq. ft.
Maximum BTU’s**
800,000/hr
Water Capacity (US gallons)
555
Firebox (L” x W” x H”)
60 x 52 x 52
Firebox Door (L” x W” x H”)
42 x 30
Weight (lbs)
4,000
Outlets
4 sest of 1.5” feeds and returns
Chimney Size
10"
Dimensions*** (L” x W” x H”)
98 x 82 x 100
MSRP
17,295

*Well-insulated house. **BTU’s are approximate and will vary depending on fuel quality. *** Height of the furnace is to the top of the li hook