Are you aware that from April 2006 all new boilers must have building regs. We only found out about this whilst in the process of selling our house! We had no idea and was completely thrown by the question. After doing some research on the web, we then discovered that this is indeed the case for all new condensor boilers. Luckily for us ours was installed in January 2006 which was before this came in to effect but thought I'd pass on this information just in case!!