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Old 01-08-2018, 10:42 PM   #1 (permalink)
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How to be more efficient with wood heat?

Still common in my area to heat with wood. Other than "magic heat tm." commercial exhaust heat exchanger looking for ideas on burning cleaner and getting the most BTU per cord of wood. I like low budget ideas as I share with others the cleaner they are the cleaner all our air.

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Old 01-09-2018, 01:14 AM   #2 (permalink)
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Big one is don't use a fire place.
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Old 01-09-2018, 01:39 AM   #3 (permalink)
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fireplace or an iron stove? I'd think an iron stove would be more efficient. Forcibly circulating air around it to the rest of the house would make it more efficient than not.
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Old 01-09-2018, 05:28 AM   #4 (permalink)
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Some people will intentionally run a bunch of near horizontal stove pipe inside to extract the most heat from the flue exhaust.
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Old 01-09-2018, 08:10 AM   #5 (permalink)
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I've read about stove pipes with heatsinks and sometimes even with forced air:




Having fins on the inside would allow even more heat recovery, but will also increase maintenance.

Basically, it boils down to getting as much heat out of the exhaust as is possible before you let it go.
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Old 01-09-2018, 09:19 AM   #6 (permalink)
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Masonry stove. Thermal mass retains the heat and gives more warmth over time with a smaller fire. Using it to heat water is just as good.
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Transmission type Efficiency
Manual neutral engine off.100% @MPG <----- Fun Fact.
Manual 1:1 gear ratio .......98%
CVT belt ............................88%
Automatic .........................86%

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Old 01-09-2018, 09:34 AM   #7 (permalink)
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Rocket stove mass heater.

Rocket mass heaters use up to 80% less wood.

Rocket Mass Heaters: The coolest sustainable heater







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Old 01-09-2018, 10:31 AM   #8 (permalink)
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This is what I'm working with a airtight wood coal stove with temperature controlled inlet. Others in this area similar sans coal shakers and heavy steel box.
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Old 01-09-2018, 01:37 PM   #9 (permalink)
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You can do a cold air intake so your fire isn't sucking warm room air up the chimney. Probably the biggest efficiency gain I can think of aside from forced air exchanger boxes.
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Old 01-09-2018, 01:46 PM   #10 (permalink)
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Quote:
Originally Posted by Ecky View Post
I've read about stove pipes with heatsinks and sometimes even with forced air:




Having fins on the inside would allow even more heat recovery, but will also increase maintenance.

Basically, it boils down to getting as much heat out of the exhaust as is possible before you let it go.
That's your typical magic heat unit.

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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white 240v evse mod, trailer hitch, new batt as of 2014.
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