Although I am happy with my supplier with his service and had address all my questions and concerns. I still have an outstanding issue, the certified installer that he quoted didn't turn-up during the installation day nor check the finished work after. Then an additional question I had when a CES was issued because I didn't hear anything that the inspection was happening. They did rang me and explained that the installer normally arranges the inspection. And the inspector might have checked it without me knowing but then they couldn't have accessed the property. They are raising my concern to the installer and have told me that they are going to get back to me. That was yesterday. So will wait and see.