OUR PROSPECTIVE CONSULTANT, a mechanical engineer, has observed that our restrooms have exhaust fans yet no clear way to replace the exhausted air. He believes that in order to approve our permit for expansion restrooms, the City might well require a dedicated source for intake air. (HVAC people call it make-up air, presumably because it “makes up” for the lost air that the exhaust fan is removing from the room.)
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| A typical restroom exhaust fan |
This raises the question: What is the best way to supply make-up air to our restrooms?
This question will eventually apply also to the basement restrooms, since they are likewise slated for eventual expansion. So let’s think about a comprehensive solution that will work for them, as well.
Below the jump, I offer a couple of cautions about one option that the architect has mentioned as being fairly normal. Then I outline a custom alternative that takes advantage of our building’s unique configuration [revised 9/10].…