Does A Powder Room Need An Exhaust Fan

You mention a shower but say i assume the powder room has a toilet.

Does a powder room need an exhaust fan.

5 points 10 months ago. Wait a minute does my bathroom need a fan. 5 points 10 months ago. Yes a 50 cfm exhaust fan is required and an 80 cfm is required if there is a tub or shower.

Check with your local code compliance officer as our fair city requires an exhaust fan in the laundry and one in the terlit room if there is no window. Also wondering how mold got up in the ceiling. Hvac do you really need a fan in a 1 2 bath i disconnected it simply unplugs the fan in our powder room because it s on the same switch with the light and the noise was really annoying. Most cases a toilet exhaust fan.

2017 code does not mention the use of a window as a substitute for an exhaust fan news to me it s always been an option. They dont call it a fart fan for nothing. While powder rooms can benefit from exhaust fans they can usually operate just as well with a window that opens. Therefore if the proposed powder room has no natural ventillation i e.

This exhaust fan should not be needed and can therefore probably be eliminated entirely. Exhaust duct to terminate a minimum of 3 from any window. Bathrooms require exhaust venting fans in some communities this section may be in lieu of section r303 3 or in addition to it. An in line fan will work to ventillate exhaust but you will require make up air that cannot be via the hvac so you ll need louvered door an undercut door transom or similar source for your make up air.

Despite this archaic loophole and the time honored tradition of relying on a bathroom window which let s face it typically stays closed 90 of the time for ventilation and though you may technically be up to code with those three square feet of glass and screen it s just not enough. Yes humidity created by the shower can cause mold. A vent fan is not required per irc code provided the window meets a certain size 3 sq ft i believe. You don t need an exhaust fan if there s no shower or tub it s just a powder room.

See icc table r1507 4 note.