I had my boiler installed in 2009; there has been problems of it dropping temperature since it’s been installed. I kept calling the person who installed it and his response was that I had a leak within my flooring. There has been numerous engineers who I called out for the same problem and the problem remains. I had home care with British Gas and still no changes, so I ended the plan. I got someone to check the flooring and no leak was found. I was recommended to a gas enginering company who said to me that these boilers was recalled sometimes ago and at the present my boiler was not fit to be purpose. enginer put a danger sign on it and also removed the fuse of my boiler. I would not recommend buying or using these boilers, I would also recommend having your boiler fully checked to make sure it’s working well and your property is safe.