While we still have some cool weather ahead, here's a great look at the unbelievable efficiency of rocket mass heaters even against an icy, frigid backdrop. A lot of people assume these wood stoves are only Southwest appropriate—not so!
Important note: Building departments in most towns still don't recognize rocket mass heaters—which presents a bit of a blockade for a lot of applications where you'd need a building permit or, for insurance purposes, would want everything built in your home or office to be up to code and compliant. Still, this heating model is gaining ground in a big way throughout the United States and world... maybe it's only a matter of time? We like to think efficiency would be rewarded. Let's just hope the heating fuel companies don't buy up some rocket mass heater patent, a la Big Oil and the electric car.