Eric Walker added Masonry heater - Wikipedia to Masonry heaters

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

Eric Walker added Masonry heaters to Heaters, and added Heaters to Heat and Heating, ventilation, and air conditioning (HVAC)

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