In my firebrand my gas cooktop has a ventilation hood over it to remove cooking odors and co. Co is deadly over extended periods of time in enclosed non ventilated places. Therefore you should never use a gas cooktop for heating especially when sleeping. It’s designed for cooking while your awake and the hood is venting to the outside.
Yeah mines got the hood also. Doesn’t matter. The smell gets into bedding and clothes. Makes me sick.