Best Combi Boilers: Which Brand Is Best In 2019?
And what do heating engineers and its own customers make of them? Read our Intergas combi boiler reviews to find out. Potterton. Potterton has a number of combi boilers to pick from that suit all size homes. Its combi boiler ranges are called Promax, Titanium, Promax Ultra, Assure and Gold, and are priced between £675 and £1,350.