[hackerspaces] hacker tent - easy construction, sturdy, name?

Lee von Kraus leevonk at gmail.com
Sun Nov 18 18:02:00 CET 2012

To stay warm you should use a very efficient heating system which transfers
heat primarily to your bodies and secondarily to your habitat. The general
concept for doing this is to have glowing coals inside of a sealed, highly
insulated 'container'. For indoor implementation this is called a 'korsi'
or 'kotatsu. For outdoor use this is called a 'fire bed'. Here's a
description of the two:

*For indoors use a Korsi:*
1) Get a large metal (non-galvanized) container that has a tightly sealing
top for it.
2) Get a lot of wood ash.
3) mix the ash with water to make a paste.
4) coat the inside walls of your container with a ~1 inch layer ash paste.
Do not put paste on the containers lid. Let the paste dry. This ash border
will act as a highly insulative wall, and the lack of paste on the lid will
allow heat to escape upwards. (on a side note, this same concept is similar
to ways in which one can make a forge capable of getting to 2,000 degrees:
5) Outside of your tent, light some coals inside of the container. When the
fire has burned down and the coals are glowing without fire put a thin
layer of ash over them and some dirt over (~1-2 inch layer) that.
6) Now you have a system that will slowly release a lot of heat for ~10
7) Build a way to efficiently distribute this heat to you and others in the
tent: Build a  'korsi' (http://en.wikipedia.org/wiki/Korsi)  (in japan it's
called a 'kotatsu': http://en.wikipedia.org/wiki/Kotatsu). This is
basically a short table which is placed over the coal container. Over this
short table you drape a big blanket which extends over the edges of the
table to the floow around it. Now you and guests can lie under the blanket
to sleep (or even just to hang out during cold days).
NOTE:  You have to make sure the coal container is *totally sealed* so that
carbon monoxide doesn't escape and kill you.

*Without a tent a fire bed* will keep you warm while you sleep during the
The nice thing is without a sealed tent you don't have to worry at all
about carbon monoxide poisoning. The general rule is you dig the hole 8
inches deep. You let the fire burn in the hole for 2 hours. Then you cover
the coals with 4 inches of dirt. See here for more info:

On Sun, Nov 18, 2012 at 10:49 AM, Frantisek Apfelbeck <algoldor at yahoo.com>wrote:

> Yes, that is the concept! I wonder if you know the name of the hacker who
> made the design? I have tried to do kind of quick search but I can not find
> his name, which kinds of annoys me because I remember to be in touch with
> him by email  ...
> Anyway many thanks, it is good concept and we will see if we can imply it.
> Sincerely,
> Frantisek Algoldor Apfelbeck
> biotechnologist&kvasir and hacker
> http://www.frantisekapfelbeck.org
> "There is no way to peace, peace is the way." Mohandas Karamchand Gandhi
>    ------------------------------
> *From:* Mel Shamanka <mel.shamanka at gmail.com>
> *To:* Frantisek Apfelbeck <algoldor at yahoo.com>; Hackerspaces General
> Discussion List <discuss at lists.hackerspaces.org>
> *Sent:* Sunday, November 18, 2012 9:55 PM
> *Subject:* Re: [hackerspaces] hacker tent - easy construction, sturdy,
> name?
> Le dimanche 18 novembre 2012, Frantisek Apfelbeck a écrit :
> So I wonder what was the name/type of the tent which was used on many
> types of hacker events, plus Burning man easy to erect and very sturdy,
> hexagonal particles. I think I talked to the guy who developed this but I
> can not remember his name I believe it was kind of hexagonal yurta used as
> I mentioned at Burning man and probably at Toorcamp.
> Hey Frantisek,
> You might be thinking if the Hexayurt. See  http://hexayurt.com/ for more
> information, plans etc. Hope it helps !
> M.
> --
> "We do it because we are *compelled*."
> TomMaillioux.fr <http://tommaillioux.fr/>
> Twitter : @Bookmore <http://twitter.com/bookmore>
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