A:Answer All portable gas generators — gasoline, propane, natural gas, dual‑fuel — produce carbon monoxide (CO), an odorless, invisible gas that can kill within minutes.
The U.S. Consumer Product Safety Commission warns that one generator produces as much CO as hundreds of cars and can kill you “in minutes” if used indoors.
Engineering safety guidance states that even open windows or doors cannot ventilate CO fast enough to make indoor use safe.
EPA guidance: never use a gas generator in homes, garages, sheds, crawlspaces, or near openings. CO can linger for hours even after shutdown.
CO binds to hemoglobin 250× more strongly than oxygen, causing rapid oxygen starvation and death.
