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Can I use a portable fan inside my car?

So I am planning on a road trip and obviously fuel efficiency is a big issue. Rather than contemplating whether I should roll the windows down or turn the A/C on, can I use battery powered, or (I have an outlet in my car) plug a fan inside my car?


Yes you can as long as it doesn't block your view from seeing out the windows or get in the way of you controlling your vehicle

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