Sam replaced electric shower unit that until then had provided ALL hot water in a 1 bed flat with no access to gas with a immersion heater tank. This was a terrible set up and needed a different solution. I found Sam very proactive and quick to respond. He was happy to answer all questions and discuss different options. The work was done quickly and efficiently. He was also happy to help out immediately when my tenants struggled with using the new system initially on a Saturday.