What is the impact on total wood consumption per year if you use a super efficient furnace like our Kuuma 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.
Kuuma
Vapor-Fire 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. Kuuma
Vapor-Fire 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 Kuuma
Vapor-Fire 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, using our efficient
Vapor-Fire 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.