This is a legacy version of the WELL Building Standard. Please check the latest version here.

Direct source ventilation

Direct source ventilation


To preserve air quality in occupied spaces through the isolation and proper ventilation of indoor pollution sources and chemical storage areas.

A bathroom can be defined as a room containing at least one toilet and sink as well as other amenities for personal hygiene, such as toilet paper, soap, paper towels and trash receptacles. "Bathroom" may also refer to a lavatory, restroom, loo, washroom, toilet or water closet. Shower-only rooms do not apply.

No. Although having additional fresh air will dilute the pollution, it does not ensure pollution isolation. Therefore, all air including bathrooms should be exhausted rather than recirculated.