Combination boiler: Makes hot water on demand and heating. No hot water tank required.
Storage combination boiler: Allows much higher flow rates for the hot water out of just one box. Floor mounted. No hot water tank required.
Heat only: as the name says, only makes heat; no pump or controls. Requires hot water tank if hot water required.
System boiler: This boiler also contains the system pump, diverter valve and controls package. Requires a hot water tank if hot water is required.
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We fit predominantly Viessmann boilers. Viessmann UK import 2 model ranges of each of the above boilers into UK. Both boilers are sedbuk A rated and when fitted by us they come with the Viessmann 5 year Parts and Labour warranty.
The Vitodens 100 is designed as a standard boiler, while the Vitodens 200 is much higher spec boiler. It has better combustion control, a very good weather compensation system and the ability to interface with multi-zones and solar input.
The biggest difference for many people is the physical size of the boiler; the 100 is more compact than the 200 version.