and what is the difference compared to other boilers
High-efficiency condensing combi, or combination boilers, are very popular in homes today because they can save space and money. A combi boiler is a compact and efficient unit that provides all the heat and hot water a small home needs while saving on operating and installation costs. Combis work like both central heating boilers and hot water cylinders and are so compact they can be hung from your kitchen wall.
New combination boilers run off of outdoor temperature instead of just being on and off. They save energy because they can heat efficiently even if there is low demand on a call for heat... They also incorporate modulating gas valves...
Joe is kind of right. A combination boiler in fact does away with the hot water tank. So, yes it does save space and they are economical to use. The hot water is supplied via the boiler direct to the taps. so you get plenty of hot water without having to store it in a tank. you only heat the water you need.
