for people burning wood to heat their homes…

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  • Thu, Nov 25, 2021 - 07:54am

    #1
    Gregory

    Gregory

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    for people burning wood to heat their homes…

it might have been someone else on this forum that pointed me in this direction, but here are my links for a form of wood/coal burning heaters that use far less fuel.

from The Artist Homestead:

Rocket Mass Heaters – increase your wood burning efficiencies 50 to 90 percent

Being a Chimney Sweep with a Rocket Mass Heater

An Incredible Tool for Splitting Kindling

So how much is in a cord of wood?

 

Books referenced by The Artist Homestead:

“The Rocket Mass Heater Builder’s Guide” by Erica and Ernie Wisner

“Rocket Mass Heaters – Super-efficient Wood stoves” by Ianto Evans and Leslie Jackson

“Better Wood Heat – DIY Rocket Mass Heaters” produced by Paul Wheaton

 

 

  • Thu, Nov 25, 2021 - 08:04am

    #2

    roosterrancher

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    for people burning wood to heat their homes…

I have buddy that built one, loves it, it is not hype.

Great post, thank you.

 

  • Thu, Nov 25, 2021 - 09:06am

    #3
    mary

    mary

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    for people burning wood to heat their homes…

we have an Amish cookstove.. I don’t think they can make you get rid of it if you cook with it. just a thought if the effetes want us to be dependent on there power..

  • Thu, Nov 25, 2021 - 10:44am

    #4
    yogmonster

    yogmonster

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    for people burning wood to heat their homes…

Here’s a couple calculators for measuring cord wood I’ve used a few times.  One for measuring stacked wood, and one for estimating cord in a log.

https://firewoodhoardersclub.com/forums/resources/firewood-cord-calcuations.16/

Edit: here is another calculator to estimate how much oil/propane, and money you might be saving by burning wood.

https://firewoodhoardersclub.com/forums/resources/big-picture-btu-online-calculator.26/

Another good tip for increasing efficiency, is to have as much exposed single walled flue pipe that you can reasonably and safely have inside your room. Especially with an elbow if possible. This greatly increases the surface area so that the heat can transfer into the air. With a small stove it can essentially double the surface area of the stove. This is what the rocket mass heaters do, except that with them the pipe is inside of the solid mass. The less heat that goes outdoors through the chimney, the better.

You just want to make sure the fire has enough air for complete combustion, or you’ll have a lot more condensed creosote to clean out or have a chimney fire with. The old Yankee method of filling up a stove and shutting it up so that it “lasts through the night”, is a great recipe for both low efficiency and creosote buildup/chimney-house fires.

  • Thu, Nov 25, 2021 - 12:23pm

    #6

    David Huang

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    for people burning wood to heat their homes…

Thanks for sharing this Gregory.  That’s actually my blog site and rocket mass heater.  🙂  What my lazy butt hasn’t done is update the first post with images now that at long last I’ve completed all the “decorative” finish work.  I waited for a few years to do this to see how it was functioning and if there were any major changes I wanted or could do.  I finally decided the size/weight restrictions created by building this in my tiny mobile home meant I couldn’t do anything more significant.

So I’ve finished it off with some salvage stone tiles and salvage slate top, with a bit of trim work tossed in.  This actually did still add a fair amount of mass which seems to be increasing the length of time it’s holding heat.

Finished Rocket Mass Heater

One trick I haven’t yet written about too that seems to help increase my efficiency has been to insert a couple firebrick into the internal heat transfer pipes.  These obstruct the flow of the hot exhaust decreasing the draft, slowing things down.  This has reduced the temperature at the exit chimney and also generally increased my temps at the hot point on the barrel just above the internal heat riser.  To me this says I haven’t decreased the heat of the burn with this trick, but I’m also keeping more of the heat inside the home.  The catch to this is that if I obstruct the flow too much then the system doesn’t have enough draft to function properly.  One needs to find the proper balance, which can change depending on weather conditions outside.

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