A gas stove is very close to 100% efficient at converting gas to heat. It is certainly not 100% efficient at putting that heat into the pot. Gas produces heat b

A gas stove is very close to 100% efficient at converting gas to heat. It is certainly not 100% efficient at putting that heat into the pot. Gas produces heat by combusting with oxygen and essentially generating hot air. The air will impart some of its heat to the pot. A ton of the heat will end up just heating the air around the stove (or being dumped outside if you’re running a hood vent). This article claims 40% efficiency and provides a citation, for what it’s worth. https://www.greenbuildingadvisor.com/article/efficient-cooking https://www.greenbuildingadvisor.com/article/efficient-cooki... It’s worth noting that natural gas transmission can’t be 100% efficient either. I don’t know what the loss is but it certainly takes energy to push natural gas through pipelines and there is loss in the system due to leaks.