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"Speaking of comfort, why even wait to start your BEV to warm it up? If you charge at home, just tell it when you plan to leave and let it preheat the cabin for you, all while still plugged into the charger. You need not worry about tailpipe emissions poisoning you in your garage because there is no tailpipe."

If you need to warm your car, it's probably outside. If it's inside, it's probably warm. Obvious exception: unheated barn/garage.

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In these parts, if you're fortunate enough to have a heated garage, you're keeping it just above freezing to keep the costs down. Still quite a difference between that and how warm you want your car to be.

Yeah, even the most poorly insulated attached garage is not going to be particularly horrible. Mine isn't great and has never got below 37, even when it's been single digits outside.

Fire departments use a system called Plymovent - magnetic rings around the engine exhaust, hooked to a big hose and fan to exhaust emissions outside of the apparatus bay, so rig checks, testing, maintenance can be conducted indoors with engines running. The hoses are also on runner rails so that they can move with the engine, and magnetically disconnect when the engine is on its way out of the bay.

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