[CatOwner]

And gas stoves are so polluting that most do not have an exhaust outside the home.

That seems to be against code. Every house we looked at in late 2018 had an fan exhaust for their stove tops, whether gas or electric.

[WhoisAlanGreenspan?]

My parent's house (1960) had gas stove with standing pilots on 4 burners. It had a kitchen wall mounted exhaust fan with a manual switch. There was never a suggestion that the fan had any purpose other than clearing smoke or kitchen odors and my Mom cooked all day long.

Recent mobile home (2002) I've been involved with has the same setup.

Unlike a gas furnace which has multiple safety checks to make sure the exhaust fan runs and even the pressure in the exhaust proves it before turning the gas on. I wouldn't be surprised if new gas stoves have fans linked to operation of burner, heck we're all dying of global warming and dishwashers and refrigerators have wireless internet.

[BlueMondaySkipper]

“ Every house we looked at in late 2018 had an fan exhaust for their stove tops, whether gas or electric.”

Most of those fans aren’t actually plumbed to the outside, and simply recirculate filtered air.