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rocket mass heater: how much fire needed  RSS feed

 
rose macaskie
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 I suppose i would have to get a visa to visit america to do this. i Hill have to try one day i will have more money next year. i would love to see it and meet everyone. how mch fire and flame do you need to warm the clay seat thruogh, for how long do they light the fire and how often.
 
 
Erica Wisner
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rose macaskie wrote:
 I suppose i would have to get a visa to visit america to do this. i Hill have to try one day i will have more money next year. i would love to see it and meet everyone. how mch fire and flame do you need to warm the clay seat thruogh, for how long do they light the fire and how often.
 


We used about 1/8 to 1/4 cord of firewood to heat our house for the winter this year.  The bench takes about 2 firing cycles to reach a comfortable, even temperature.  We maintain this temperature by lighting a small fire for 2-4 hours in the evening (up to 6 hours if the weather is cold or we are bored and have lots of firewood) and by the end of that time, the heat is beginning to renew the warmth at the surface.  It holds the heat pretty well all day, and stays somewhat warm until 2-3 days later. 

A rule of thumb is that heat travels through cob at about 1 inch per hour.
 
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