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

Arclight arclight at gmail.com
Sun Nov 18 19:54:15 CET 2012

For heating, there is also a traditional type of fireplace that's been
used in Korea for centuries. It's basically a firebox on one side of
the house, with smoke tubes that travel under the floor and a chimney
on the other side.  It's called an Ondol. Check out:



On Sun, Nov 18, 2012 at 9:02 AM, Lee von Kraus <leevonk at gmail.com> wrote:
> 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:
> http://www.youtube.com/watch?v=KtQrE4PCT8k)
> 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
> hours.
> 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
> winter:
> http://www.youtube.com/watch?v=FDwTKAWhLfg
> http://www.youtube.com/watch?v=2ch8Wek0d-Q
> 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:
> http://www.survival.com/art1.htm
> 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
>> Twitter : @Bookmore
>> PGP : 0xCE442D1D
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