Bathroom vent ? Thats where i installed one. It worked much better than the small bath fan and uses less amps.
Or…tap off a nearby ceiling light if one is close enough to your vent.
I installed a fancy one with sensors that closes it when it rains, opens when sunny, takes the temperature and balances your checkbook .
I wish i stayed simple buying the basic model . The one i installed malfunctions on humid days, it automatically closes. I was better off with a basic model and vent cover.