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 fore. 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 i.e. Combi, Conventional and System Boilers. And the best boiler brands in the UK market in 2018, i.e. Viessmann, Grant, Worcester Bosch, Vaillant, Ideal, Baxi, Glow Worm etc.