Does A Powder Room Need An Exhaust Fan

Also wondering how mold got up in the ceiling.

Does a powder room need an exhaust fan.

Wait a minute does my bathroom need a fan. Yes a 50 cfm exhaust fan is required and an 80 cfm is required if there is a tub or shower. This exhaust fan should not be needed and can therefore probably be eliminated entirely. Most cases a toilet exhaust fan.

Yes humidity created by the shower can cause mold. 5 points 10 months ago. Therefore if the proposed powder room has no natural ventillation i e. Is there a window in this powder room.

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. 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. You don t need an exhaust fan if there s no shower or tub it s just a powder room. While powder rooms can benefit from exhaust fans they can usually operate just as well with a window that opens.

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. They dont call it a fart fan for nothing. You must eliminate the wiring as you indicated as well. Exhaust duct to terminate a minimum of 3 from any window.

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. An operable window you will need mechanical ventillation. See icc table r1507 4 note. Bathrooms require exhaust venting fans in some communities this section may be in lieu of section r303 3 or in addition to it.

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