Actually, Ive just checked the Icon instructions for the 230v models and it states this on page 2:
"The iCON Fan has an IP X4 rating housing and is suitable for mounting in Zone 1 or 2 in bathrooms, toilets, kitchens, utility rooms and inside shower cubicles as defined in Section 701 BS7161:2008 (IEEE wiring standards, 17th Edition ). They also comply with the latest Building Regulations."