#2. How Much Air Do I Need?

This depends on your building codes and any open-able windows. If you have windows that open, this usually meets the legal requirements, so you are only interested in removing moisture. If you don’t have windows, check your code as to the minimum.

Remember that air can’t get out unless it can get in. Undercut the bottom of the door by 15mm or so in order that the air can get into the room to replace what is taken out. You may even need a grille if you are taking a lot of air out.
Other Questions that might be of intrest ...
  1. Do I need an outlet vent downstairs in a two-storied house?
  2. Noise Ratings
  3. How Much Air Do I Need?
  4. What is the Warranty on the Weiss HVS?
  5. What is a Fan?
  6. Will the HVS System work the same with the internal doors closed?
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Due to the variation between cities and countries, we have to keep the advice fairly general, and you should check your local requirements.