Amazon Basics 20" High Velocity Industrial Cooling Floor Fan with 3 Speeds, Tilt Head, ETL-Listed Safety Compliance, Metal Housing and Blades, for Commercial Space/Garage/Gym, 125W, Black

I've been dealing with the same issue recently with my upstairs being 10 degrees hotter than my downstairs. I got a high powered garage floor fan I set on my bed and aim out the window for the last 2-3 hours of the day and it very quickly cools the room down. Just get a strong fan like this one. Heat rises, so I find it's better to elevate it than leave it on the floor when exhausting. https://www.amazon.com/dp/B07XGQ9RM3?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1