[Ken]

I had a FOAF ring me the other day as they wanted some info re: wfps. I steered them in this general direction for a rounded out view of the whole thing. However he did tell me that he had heard of a wfp system that also had a compressed air system attached to dry of the windows. My questions are (1) Has anyone else heard of this? and (2) how tangled up would you get?

[replacement]

Reach and Vac system that sounds like.

Have a look here  http://www.ionicsystems.com/english/index.html