I think you are over-thinking it.
I agree with this.
I have 10 rigs out in the shed... it leaks when it rains..... I have killed upteen number of bugs and spiders with the fans and such.... left the door open and rigs running even when the hurricane came thru. These putters are not that 'soft'.
The best thing I have found is fresh air for them!
I keep wanting to do this, but, I just dont trust a) running a lot of extension power out my window and b) people not to investigate the really loud humming shed, and help themselves to some computer parts. I wish I had a garage, I would get brownie points from the lady friend for heating it, instead of trouble about all the noise I am causing :p