Rocket Mass Heaters: The coolest sustainable heater
Amazon.com: TAFEIDA ROCKET STOVE is the perfect wood stove. A portable wood-burning camping stove with a fire poker. For camping gear & survival gear, backyard cooking. Camping grill, outdoor events. (Elite) :
Heavy Duty Portable Wood Burning Camping Stove, Rocket Stove, Small Wood Stove | eBay