By burning at a high temperature, and banking heat in thermal mass, a rocket mass heater is an exceptionally efficient way to heat your home. The plans for this one are available from Walker Stoves. I collaborated with both youtube.com/@StefanoCreatini
and the mighty youtube.com/@irahouseweart on this build. Be sure to check out their channels!
All of the specialized materials used can be found here:
https://www.amazon.com/shop/radicalgastronomy/list/UA4W9AAIDTCJ?ref_=cm_sw_r_cp_ud_aipsflist_9N19ZA3N652KYP85XPZ5
High heat metals can be found here:
https://www.rolledalloys.com/products/nickel/ra330/
Amazon prices may not be the best option on some of this, so shop local retailers for things like fire brick and fire clay.
Click here for Radical Gastronomy merch!
https://www.radicalgastronomy.com/merch