Impact on total wood consumption when using a super efficient furnace like the Kuuma?

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lampmfg

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What is the impact on total wood consumption/yr. if you use a super efficient furnace like our Vapor Fire?

Here are the important numbers that need to be examined: 1 gal. #2 fuel oil = 140,000 BTUs; 1 gal. propane - 91,500 BTU's; 1 cord paper birch wood = 21 M BTU's; 1 cord red oak = 25 M BTU's.

VaporFire furnaces were tested to have an overall efficiency as high as 85%, 99.4% combustion efficiency, less than 1 gr/hr of emissions, 99% smokeless burn cycles, internal flue temperatures 285-400 degrees F., and external flue temperatures 150-250 degrees F. VaporFire furnaces have been used for over 25 years with no condensation issues whatsoever, because the flue temperatures are still high enough to support a natural draft system when installed according to our written directions.

A good estimate for oil usage for a heating season would be 500-1,000 gal., with lots of variables. We'll take a look at an average home using 750 gal. of oil for the heating season. 750 gal = 105 M BTU's. If a wood furnace was 100% overall efficient, which is not possible, it would take : 105 M BTU's /21M=5 cords of birch or 105 BTU's/25M=4.2 cords of oak.

Our VaporFire furnace at 82% average overall efficiency would be; 105 M BTU's/(21Mx82%) = 6.09 cords of birch or 105 M BTU's/(25 M x 82%) = 5.12 cords of oak.

Most manufacturers struggle to hit 60% overall efficiency, but we'll look at their results based on 60%. 105 M BTU's/(21M x 60%) = 8.33 cords of birch or 105 M BTU's/ (25M x 60%) = 7 cords of oak.

Therefore, as you can see, using our efficient VaporFire furnaces will, without a doubt, use less wood to deliver the same amount of BTU's you'd require in oil or propane for the heating season then a less efficient furnace would. The other big advantages are minimal air pollution, longer more even burns, and minimal creosote accumulation from 99% smokeless burn cycles. The safely aspect is also huge in saving homes and lives.

I'm quite sure alot of manufacturers will be very surprised to see their furnace test results when regulations come into effect in 2013-14. They're not going to believe how much air pollution and wasted wood their so called efficient furnaces have produced. Many manufacturers will have to fold or redesign their furnaces quickly. I'm thankful that I invested the time, effort and money in preliminary testing so that our company is prepared for the future. We knew the regulations were forthcoming.
 
Not gonna pick apart your whole post,but.....200 gallons of #2 fuel oil has 30 million btu's divide that by 200 and you have 150,000 thousand per gallon.
 
I prefer my less efficient yet aesthetically pleasing stove in the living room.Everything they boast about the vapor fire is contingent on the consumer using well seasoned wood.Its well known that wood with a low moisture content will smoke less and produce more heat no mater what stove you have.
 
That is correct about the seasoned wood, but is the same with any stove. Are you saying that you just burn any type of wood? An aesthetically pleasing stove in the living room is nice especially for the wives!! I like mine in the basement or should I say man-cave.
 
How well my wood is seasoned depends on how much is left over from the previous season.I got about 3 cord of well seasoned to start out with this year.Stuff Ive had for about 3 years that always ended up not getting used and will mix it with the other stuff that was bucked last year but wasn't split till the beginning of this summer.I'm hoping for a mild winter so I have a good start next year.Ive been pondering getting a truckload of wood just to get way ahead so I always have good dry wood but moneys tight and what Ive been getting is free so I cant complain.
 
Lamp, do you know what type of wood was used in the testing of the furnace, and it's moisture content? Obviously getting the best performance involves using good seasoned wood.
 
Red Oak was used with a moisture content of 18-28% for the testing.
 
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Thanks, just wondered. 28% sounds a little high for firewood.
 
18-28% seems to emcompass more real-world moisture levels that folks encounter.

Sure, burning kiln dried at 12-15% would be optimal but that would exclude the folks that bargain hunt and buy wood from the cheapest guy on craigslist, or parked along the road.
 
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