Best Electric Fans for Upstair

i bought 2 of these fans for my upstairs bedrooms.

i placed it in the upstairs window of my two story house in my pet bengal cat's room where it was getting quite warm.

it has worked great for ventilating my room and keeping it consistently cooler than the rest of the upstairs.

i'm a retired person, living upstairs in a tiny living quarters with someone else living downstairs who is in control of the heating and cooling of the house.

simple to install, masks the noises of the upstairs neighbors and brings in great night air.

the upstairs gets so hot it is unbearable.

with the fan on and with the windows and doors set up correctly, the upstairs bedrooms stay within three or four degrees of the outside temp for me without having to turn the air conditioning on.

i purchased two, one for my upstairs bedroom and one for the downstairs living room.

but i bought this fan because i live in an upstairs apartment, and i wanted my place aired out and cooled off a bit during the day while i'm at work.