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Summary
part 2 of a 3 part podcast
Continuing the discussion about heating your home if it was 100 below
Paul advances the theory that if it got excessively cold the electricity would go out. Experience teaches that in extreme weather this tends to happen. Most common means of heating won't work without power, even if the main heat source isn't electric. Most wood stoves would work, plus of course RMHs and old style masonry heaters.
Paul figures when it's 25 below in winter he runs his RMH for only around 5 hours a day. If it did get to 100 below, he would have to burn it longer.
Paul and Peter now get into discussing batch boxes vs J-tubes. Peter says that to get the same amount of heat both burn about the same amount of fuel, although in a different way. The J tube needs more frequent feeding. The Batch box burns more fuel per load, but has to be able to harvest the heat effectively.
Peter describes the differences in batch boxes: they can be made to work faster or slower, depending on how much mass you add. Without much mass it's a direct space heater ideal for a workshop or similar space. Paul says for this purpose a batch box works better than a J tube since it can burn more wood per load and heat the space up faster.
When it comes to heating a home, the J tube is more flexible. If Paul's house is a touch chilly he can burn the J tube for half an hour and increase the temperature by a few degrees. Peter prefers to have a pure mass heater in his house, but you do have to burn it appropriately for the space it's heating. Paul mentions this is an issue with people who aren't used to a mass heater.
Relevant Threads
Rocket Mass Heaters forum
Wood Burning Stoves forum
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