Paul, your video furthers the effort to make a strong case for building rocket mass heaters. I assume you were reporting on that pretty-cold winter of '16/17. Some folks would be interested in more info relating to the .6 cords of firewood used to heat your three-bedroom house: house style & floor area; nature of the home's insulation; composition of the firewood used.The masonry stoves typically heat with about one fifth the wood and typically cost $10,000 or more.
A rocket mass heater will typically heat with about one tenth the wood and cost about $400. I've heard of people building them for $20. I've seen about a dozen built where each was built in a weekend. I've seen some of the pebble style rocket mass heaters built in less than a day.
I have a pebble style rocket mass heater in my 3-bedroom home in montana. We heated this house last winter with 0.60 cords of wood.
I recently hosted the gathering of the world's leading rocket mass heater experts and we sat down and addressed an engineers doubts about "one tenth the wood":