With an efficiency rating of 94% and an ErP a-rating for heat, the Vitodens 100-W 25kW combi gas boiler is a highly reliable combi boiler that could help you reduce your energy bills and carbon footprint, depending on your current boilers efficiency rating.
Combi boilers are often chosen over a system or regular boiler as it is compact in size, meaning it can be installed neatly into a standard kitchen cupboard. Another benefit of a combi boiler is that they remove the need for any additional storage tanks or cylinders, this is because it combines both a water heater and a central heating unit in one, saving space in your home.
The Vitodens 100-W 25kW has an output of 25kW for central heating and 31.7kW for hot water. This output is powerful enough to heat small homes with up to 15-20 radiators and a single bathroom. If your property has a higher demand for heating and hot water, the 100-W 32kW model is available. But for smaller homes, we recommend the Viessmann Vitodens 100-W 19kW.
