As I continue to build my new shop I have many questions.
Today the question is: is it easier for a fan to push or to suck air trough a filter?
Or does it make no difference?
The reason for my question is that ,as some of you already know, I want to install my dust collector and my air compressor in a small building adjacent but outside the shop but to have the air returning to the shop as to not waste conditioned air (warm or cool). As to not carry dust back in the shop with the air I want to returned air to be filtered (possibility through an HEPA filter) and to do so I want to assist the air flow with a fan.
My question is: should the fan be installed upstream or downstream of the filter or does it make no difference? (Downstream would keep the fan clean).
Thank you for your time.