Hi I have recently quoted for a job to install 2 wall mounts in a small office. Customer is now asking about building regs it has never been an issue on little jobs like this. But it has made me think by the book should the customer inform them of the work. The units are small 1 x 7Kw and 1 3.5Kw both A/A rated and on the E.C.A list so efficiency would not be a problem. Our company has an interim fgas ticket. Would apreciate some input from you guys.