Heat your home with 80% less wood while eliminating smoke, ash, and constant fire-tending. Complete construction manual for building ultra-efficient rocket mass heaters that provide superior comfort, slash heating costs, and burn so cleanly they're legal in smoke-restricted areas.Why Rocket Mass Heaters Outperform Traditional Wood Stoves:Conventional wood stoves waste 60-80% of fuel energy up the chimney. Rocket mass heaters capture and sto...