Originally Posted by SFDavis50
If the MaxxFan and bathroom exhaust fan are on at the same time, you need to make sure there are enough open windows. The other fans are more powerful and will try to pull air back from the kitchen fan vent as soon as it opens. Also wind direction may affect how well the kitchen fan works if other fans are also exhausting air.
We always run the MaxxFan on intake and also have the kitchen window cracked open to increase the exaust air flow