Would give them less than 1 if I could. Worst company I have ever encountered. I had only heating upstairs they took a look and left saying I needed a pump. Fitted pump still no proper heating came back and did a power flush. Had no heating or hot water!! Basically flushed it incorrectly all the sludge blocked the pipes between the immersion & boiler. Came back again cut out some pipes. Still nothing I need new parts for boiler and apparently another power flush! 4 weeks later now and 2 missed appointments. And waiting avoid at all costs unless you don't want any heating or hot water!