Officiating at the Indoor Air Quality Certificate (IAQ) Award Ceremony and Technical Seminar today (May 3), the Permanent Secretary for the Environment, Transport and Works (Environment), Mr Kwok Ka-keung, presented Excellent Class IAQ Certificates to representatives from premises owners and property management companies in recognition of their efforts to achieve good IAQ. Mr Kwok (right) is pictured presenting an Excellent Class IAQ Certificate to the IAQ Information Centre.   Close