When my over-the-range microwave's vent fan is on, it blows hot air from the vents above it into the kitchen. Is it supposed to do that rather than out of the house?
Can the air sucked out by an exhaust fan from a room go back in through an open window on the second floor of the house? - Quora
![You can see my fan setup in case. Is top right exhaust fan pulling fresh air coming from front top fan? Should i remove it soo CPU cooler can pull more air? : You can see my fan setup in case. Is top right exhaust fan pulling fresh air coming from front top fan? Should i remove it soo CPU cooler can pull more air? :](https://preview.redd.it/isz8j72eumk71.jpg?auto=webp&s=ce98ca3227b8f80a871001529170444b4fafd928)