pvc covered fans would hurt plants?

i know that pvc is toxic for plants.
but there are lots of pvc covered extractors.are they suitable for growing rooms ?
eg:
http://www.hydroponic-shop.com/product_info.php?products_id=1096&osCsid=22ecf0a31c1f8d423d154d54aec5abdf

http://www.dampkring.nl/14951/ruck-inline-fans.html

http://shop.bushplanet.tv/ltirvk-160-a-p-298.html?main_page=product_info&products_id=298

http://www.hydrogrowsystems.co.uk/store/product.asp?spc=SYF

i know pvc is harmful for plant becasuse manufacturers of grow tens such as homebox ,secret jardin says '' pvc free grow tens ''.


however i see many people happy with their fan..

i want to know whether these fans are ok ?