They have installed a combo boiler. New white plastic pipes instead of copper (it can last the same but at a fraction of a cost and if something happen it's easier to replace). Warranty on piping 25 years (labour not included, of course). It came the time when the pipes started to leak (7 years after the installation). Since Monday, the customer service told me somebody from the installation team would have called me back. I have a massive lick and a house which is a proper mess. Because of the drop in pressure the boiler works on and off and will soon break down (but I have 2 daughters and can't stay without heater). Today, Friday (4th phone call) I have had to call them back again and again somebody will call me back. Do you really think I will ever receive a phone call? Of course not. But first thing they said on the phone was they would have charged me £130 for the first hour and they were looking at Wednesday next week. Really?? I have heavily complained with the customer service and asked for my call to be escalated to one of the managers (of course nobody was available). Bottom line, I am still waiting for phone call which I will never receive and i will now have to pay for somebody to come out, lift the floors and repair the pipes. After that I will have to re-plaster the ground floor, and replace the floor (lifted because of the water). This is the worst company I could have come across. Think twice before you spend your money.