New boiler is now working fine but froze up and caused a flood in the cold weather. I had to call an emergency plumber to lag the outside pipe which immediately cured the problem. I feel that this should have been advised for and done at the time of installation - it was a predictable event. During installation I was told that the the installer would have been able to replace some valves affected by the work - he had seen the 'set up' when he quoted, but he was too busy to top up all his stores on the van. The consequence was a leak onto electrical parts - again, entirely predictable as he admitted himself. This shorted the supply and left me without lighting etc for a day and a half, in the winter. I was charged for the call out to fix it as I was told it was not part of the original quotation. The dirty marks his companion left on the carpet are still there. So, the boiler seems to be running well but the experience associated with the installation was not good. I believe that I tried to email / telephone the company but my communication was with the installer. He did not respond to my emails re the leak, hence I used an emergency plumber.