Good morning. I recently read an article in Fine Homebuilding magazine titled BREATHING FRESH AIR INTO BATHROOM VENTILATION. The article states…”Enclosed water closets, showers and bathtubs each require 50 cfm of fan capacity.” I am not a builder so I admit in advance that this is a very dumb question. Nonetheless, can someone explain to me why an exhaust fan is suggested and/or required for a water closet? Isn’t a water closet simply a small closet that encloses a toilet for privacy? If so, then why would you need an exhaust fan just for a toilet? A toilet does not emit moisture or steam into the air so why exhaust it? Or is an exhaust fan recommended simply to help remove any unpleasant orders from the water closet? Thanks.
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Water Closet is just another name for tilet fixture in this instance. The primary purpose of exhausting toilet rooms is for odor removal. Personally, I recommend the exhaust rate to acheive 10 air changers per hour and to be at leats 30 cfm greater than the total of supplies in the room, if applicable.