• Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education skip experiences global resources cider press projects digital market permies.com pie forums private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Anne Miller
  • Leigh Tate
  • jordan barton
  • Pearl Sutton
  • Nicole Alderman
stewards:
  • r ranson
  • paul wheaton
  • Greg Martin
master gardeners:
  • Carla Burke
  • John F Dean
  • Jay Angler
gardeners:
  • Nancy Reading
  • Mike Barkley
  • L. Johnson

Using a Wood Stove Draft Fan with a Rocket Mass Heater? Ask Uncle Mud

 
pollinator
Posts: 362
Location: Burton, Ohio
124
8
  • Likes 3
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Some of the perfectionists are really not going to like this post on using electric fans to help start your rocket heaters, but there are some days when you just don't care what other people think.  This is also probably the best place in the world to argue about it so bring it on.
Seriously though. I love you all. Especially the ones I like to argue with.
--Mud

The question was: How do I start my Rocket Mass Heater when the draft is low?

A chimney draws or drafts due to warm air being lighter than cold air, so it tends to rise, which lets your exhaust gasses escape AND draws more air in to the heater to feed the fire. A Rocket Mass Heater breathes a lot of air in order to completely burn the fuel. The hotter the fire is the more your temperature difference is and the more powerful your draft will be, and the hotter and cleaner and more efficient your fire will burn. In the deep of winter the chimney at room temperature will already be "warm" compared to the outside air so a chimney will draw well enough right from the start for the fire to get the air it needs.

As an aside note, your chimney will always be trying to pull the warmer air out of your house so it is important to be able to completely close off your heater air intake when you are not burning it so the chimney isn't pulling warm air out of your house unnecessarily.

As far as starting the fire, there will be times of the year usually in the fall and spring when there is not enough temperature difference between the air outside and inside for your chimney to draw properly and you can fill your house with smoke trying to start the fire and get the chimeny warm enough to fire. I have seen some lovely days where the sun came out and it was actually warmer outside than it was inside, so getting the fire to draw was even more challenging.

This video discusses some of my favorite options for draft assist, or as my friend likes to say, "suck starting" the fire.

Thank you for watching. Please consider supporting us at https://www.patreon.com/unclemud

The draft fan I use is in the link below. Please note that you will need to cut the pipe and attach the fan yourself.

Product link: https://amzn.to/3qblTzN

#unclemud #rocketheater #rocketmassheater #rocketmassbench #draftassist #draftassistfan #rocketheaterfan



 
I'm full of tinier men! And a tiny ad:
"Permaculture Now! - Desert or Paradise?" movie by Sepp Holzer
https://permies.com/wiki/137395/Permaculture-Desert-Paradise-movie-Sepp
reply
    Bookmark Topic Watch Topic
  • New Topic