Can You Use Bathroom Fan In Kitchen

Depending on your usage you might consider a slightly larger fan to make sure you have enough power to clear the room.

Can you use bathroom fan in kitchen.

That would be 960 cf assuming 8 ft ceilings. Bathroom and kitchen exhaust fans also can transmit large volumes of moist humid air into the attic or other confined spaces. The trick is to simply exhaust this air from the fans directly to the exterior of your home. So if you have an 8 foot x 10 foot bathroom you would need at least an 80 cfm fan.

As a general rule bathroom fans are not suitable for use in the kitchen as many have no filter inside them. You cannot by code and should not by practical reasoning share exhaust venting between a kitchen exhaust and a bathroom exhaust fan. Have seen many bathroom fans used in kitchen over the years and all eventually fail in the same way in that oil grease in the air from cooking vapours etc build up on the fan blades and inside the fan casing causing the fan motor to sieze and stop working. Fans installed above kitchen ranges must be listed for that application by ul and must be designed to handle grease and high temperatures.

You say the kitchen is 120 sf but you need to take in to account the height. An alternate approach is to use a ducted range hood or downdraft exhaust and a bathroom ventilation fan to exhaust the general odors and moisture in the kitchen. This would be the minimum ventilation.