Can you run an air mover overnight?

Yes, you can run an air mover overnight and in fact professional water damage restoration companies do this routinely as part of structural drying. Air movers are designed for continuous operation for days at a time, with heavy-duty motors that can run 24 hours a day for a week or more. If you are drying water damage, you should leave air movers running overnight without turning them off, because turning them off allows moisture to resettle and can greatly extend drying time and increase the risk of mold growth within 24 to 48 hours. For safety, place the air mover on a dry, flat surface, ensure the power cord is not damaged or in standing water, use a GFCI protected outlet, and keep the air intake clear. They are somewhat noisy, similar to a loud fan, so if noise is a concern in a bedroom, you may want to close the door or use earplugs. For general cooling or air circulation in a home, running overnight is also safe, though it will use electricity. Commercial air movers typically draw 2 to 8 amps, so they are not a fire hazard when used properly. Do not cover the unit, do not use an extension cord that is undersized, and check that the unit is not overheating.