It`s almost like this one, but 300m3\h more. What do you measure the blow\suck power in? ppm? Tried to google this stuff, but it`s hard!
http://www.hydroponics.eu/fans-and-filters-c-29/extractor-fans-s-79/inline-air-extractor-ruck-rk-indoor-ufo-25cm--1200m3h-1234.html