When we ask the question Which Boiler is Best every year we get vastly different answers. Because modern condensing boilers can be so similar every little detail counts. Which is where internal components and their quality come to the foreground. This comprehensive guide makes it easy for you to choose the best boiler for your property type, size, number of showers, radiators etc. We also look at types of boilers such as Combi, Conventional and System Boilers. And the best boiler brands in the UK market in 2018: Viessmann, Grant, Worcester Bosch, Vaillant, Ideal, Baxi, Glow Worm etc.