Due to the problems with the installer, I am only able to give you a low score. it cost me 4 days off work to get the problems solved by another installer who was great by the way. I have not been offered any compensation for the missed working days I had off and the previous installer left a trail of destruction to my new boiler, house and the flue. I was left without hot water for 3 weeks and the whole boiler was plumbed in the wrong way round. Sorry, I can't recommend you as the service I received was a disgrace. I have cancelled the service contract as a result of this. I was badly let down.