Envirofit's latest stoves, introduced this year in a project sponsored by the Shell Foundation, use a carburettor design, with chimneys that draw air in through precisely calibrated inlets.

Envirofit的最新炉具，今年在壳牌基金会赞助的一个项目中被引进，使用一种化油器设计方案，通过精确校准的进气口放进空气。