Is a bathroom required by code to have a window or exhaust fan?
Codes differ between areas and across time. The International Residential Code requires SOME form of venting, either a fan exhausting to the outside with at least 50CFM or a window with at least 1-1/2 sq. ft. of opening area. Whether or not your locality adopted those standards at the time your condo was built is not something we can help with. But code or no code, an un-vented bathroom (with a bath or shower) is a bad idea and ESPECIALLY in a humid part of the world.
&quot;Ventless&quot; bathroom fans are only for fart control by blowing the air through a carbon filter, they have zero effect on humidity and the likelihood of mold and mildew formation.