Simoshi carefully selects its improved cook stove (IICS) manufacturers. As such, and as a Clean Development Mechanism (CDM) requirement, all IICS need to be tested at an accredited laboratory and prove to be at least 20% thermal efficient (equaling 50% in fuels savings).

Uganda Stove Manufacturers Limited (UgaStove) has been selected as Simoshi's IICS supplier. Their products are continuously tested at laboratories such as CREEC and Chemiphar, and their rocket models will now be distributed in schools participating under Simoshi's carbon finance programme.