I wired up two paired heat detectors in my garage. Took a few minutes, but no biggie, frankly. After owning a Bolt and then switching to another EV, it just seemed a necessary precaution.
My garage is integrated as part of the house, and I sleep in the room directly above the garage. Used to get damn hot in summer, with engine heat rising into the living area! I used a pair of wired Kidde Heat Detectors, and their audio alarm is loud enough to let the whole house know if there is an issue.
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