Make a $4 emergency biomass stove from concrete blocks

“In the aftermath of a disaster, purifying drinking water may be a priority. The quickest, safest method could be boiling. This biomass stove only requires four concrete blocks, a tin can with both ends cut out and a gas stove … Continue reading →

Rocket Mass Heater Builder’s Guide Kickstarter

Hi Owen, I wonder if you’d consider posting our Kickstarter project, for a new book entitled the Rocket Mass Heater Builder’s Guide. This book shows how to build a rocket mass heater, so you can enjoy overnight comfort from a … Continue reading →