List of NADCA and EHS Approved Hygiene Companies in UAE. Jun 24, 2014 5:42:10 GMT Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Smashing Dale on Jun 24, 2014 5:42:10 GMT 1. NADCA Certified Companies in UAEBeware of fraud HVAC Cleaning Companies, it may cause serious damage on your ducting system.2. EHS Approved Hygiene Companies