Re: Positive Air Pressure
"sounds like my ex-wifes reason for giving up on sex"
You should have tried what I did:
In the five weeks or so it took for the replacement fan to arrive from China I found that if I drizzled a little canola oil into the old fan, as a kind of lube, it would work fine for a couple of days before gradually becoming more noisy then seizing up again.
Pro tip: canola oil doth not a good lube make (for fans). Other oils may perform differently; YMMV.