Ali and John were brilliant from start to finish. For a start, they called me, and arranged for a time to come. Ali had some good ideas about how to repair my very ancient boiler and brought with him some spare parts so that he could swap them in and see which needed replacing and which didn't. In fact, when he came he quickly realised that the boiler needed to be replaced rather than repaired, and he explained why. He gave a competitive quote for installing a new boiler, advised me on what boiler to choose, and was able to come and complete the job the next day. The installation involved drilling a hole in the wall and creating a soakaway in the garden, so it was not straightforward. They made a big effort to make this a neat and careful job, with as little impact on my decor as possible. They waited patiently for a smart thermostat to be delivered, and made sure everything was done before they left. They cleaned the kitchen up very well, and made sure I understood how the warranty worked etc. I would highly recommend Radiant. Ali and John were also cheerful and polite and a pleasure to have around.