This is the one. Manufactured by German boiler giant Viessmann, it’s rated consistently highly and was the Which? Best Buy Gas Combi Boiler September 2021. It also has some very cool features.

See the best oil boiler brands. Heating oil is normally used in ... and you can get heat-only and combi condensing oil-fired boilers. Most oil combi boilers have an internal hot water store to supply ...