Calling out a plumber can be expensive these days, so here's a handy guide to help you unblock drains. Combination boilers are the uk’s most popular type of boilers for both. Environmental health & licensing. There are many other brands around which provide perfectly serviceable boilers, so don’t panic if you’re considering a brand not on this list from biasi to heatline, keston to veissmann, all boilers have to conform to the same safety and.
Category: boiler service