Bought a new Eco Vaillant boiler from British Gas. After the installation the pressure on the boiler was 3.6. Was advised this was normal for a new boiler despite clear advice on the Vaillant website that this is high pressure and indicates a fault. I then had to schedule repeated post installation engineer visits to try to identify the fault (whilst being simultaneously told by the installation manager that if there was a fault it was probably nothing to do with the boiler). This meant multiple days off work waiting in for engineers who were unable to identify the problem and hours of time wasted bleeding radiators, monitoring the pressure, turning all my radiators off and on on the advice of engineers, loss of privacy with engineers in all the rooms of my house spending hours checking all the radiators when the fault was with the new boiler. I was repeatedly gaslit by the service manager telling me that the boiler wasn't faulty. The fault (on the boiler) was finally identified by a more senior engineer who identified it straight away and it was then fixed. This involved seven post installation visits. At no point have I had an apology from British Gas despite writing a detailed complaint. All I got was a rude phone call denying any culpability for the situation. I am still waiting (two months later) for a written response to my complaint. I therefore would NOT recommend anyone else to have a boiler installed by British Gas.