The Block” Rocket Stove! – Do it yourself Rocket Stove – (Concrete/Cinder Block Rocket Stove) – Simple Do it yourself How to make a “Four BLOCK” Rocket Stove! Four concrete blocks is all it can take to make it!
fireplace surrounded by sculpted cob - a mixture of clay, sand & straw - that absorbs the heat from the fire and stays warm long after the fire is done burning. Much more efficient than a regular fireplace (which can have a net cooling effect).