My old boiler was over 20 years old and the hot tank was starting to leak. Ben replaced it with a combi boiler – this took 2 days of hard work as he also had to drain/clean out the radiators which were full of sludge. There were a lot of them as this is a big house. He did an excellent job, cleaning up as he went along and removing all the mess, old hot tank etc. He turned up spot on time (07.30 as arranged), was very patient at explaining the new system and I’m pleased with the result.