On 2008-02-27 23:19:32 +0000, "the_constructor"
said:
Can you possibly give me a ref number please ?
Can you explain difference between axial and centrifugal etc.
James

http://www.vent-axia.com/lo-carbon/l...esidential.asp

http://www.vent-axia.com/knowledge/h...whatisafan.asp