Best and Worst Boiler Brands 2026: A London Heating Engineer’s Guide
Based on Which?’s annual survey of over 10,064 owners, 225 engineers, Ferroli and Vokèra consistently score lowest for reliability and parts availability, alongside Potterton, Glow-worm and Heatline. Worcester Bosch and Vaillant have topped the reliability rankings for over a decade and remain the two brands our gas boiler services London engineers install and recommend most often. If you’re comparing boilers before a new boiler installation service in London, … Read more