For Exactly what it is, an in home 1 family sized replacement for the 3 rock open indoor fires This is an additional step forward for the 60% of the Planet's Eight
Billion people !
This is not to be compared with Rocket Mass Heaters, or even the slightly higher efficiency Industrial Cook Stoves with or without Vertical solid fuel feeds
Please before you post ! Follow up with this link too !
http://www.designboom.com/design/philips-philanthropy-by-design-chulha-smokefree-stove/
For the Good of the Worlds People ! Big AL
Late note : There is mention of "concrete modular units'' these simple cook stoves operate at much lower temperatures than found in a RMH, and there is no specific
use of the term 'Portland cement', this is probably a good place for 'Ciment Fondue' I will check into this !A.L.
I found the 2nd video that is supposed to go with this ! Link below