Eric Walker added Guy in scotland likes the rocket mass heater he built. He talks about how it uses one tenth the wood : preppers to Rocket mass heater (RMH)

Eric Walker added The rocket mass heater. The cheapest home heating system. The most efficient home heating system. - YouTube to Rocket mass heater (RMH)

Eric Walker added Wood burning stove? Help me find good ones to compare, please. : preppers to Rocket mass heater (RMH)

Eric Walker added Rocket mass heater - Wikipedia to Rocket mass heater (RMH)

Eric Walker added Rocket mass heater (RMH) and Masonry heater - Wikipedia to Masonry heaters, and added Masonry heaters to Heaters

Eric Walker added a number of links to Rocket mass heater (RMH), and added Rocket mass heater (RMH) to Masonry heaters