The Viessmann Vitodens 100-W range is well known for its high-efficiency ratings and ErP ratings. With an efficiency rating of 94% and an ErP A-rating for heat, not only is the 11kW a reliable system gas boiler but can also help to reduce both your carbon footprint and your energy bills.
The 100-W 11kW is a compact and lightweight system boiler. However, it is important to consider that system boilers need an additional hot water cylinder when purchasing a new or replacement system boiler. The water for a system boiler is supplied directly from the mains, similar to a combi boiler, however, the heated water is then transferred into a hot water storage tank for when it’s needed. While this does take up more space than a combi boiler, it does allow them to meet higher demand for hot water - great for homes with multiple bathrooms.
With an 11kW central heating output rating, this system boiler is best suited to properties with up to 10 radiators. However, if your property needs a more powerful system boiler then Vitodens 100-W range also includes models with outputs of 19kW, 25kW, and 32kW.
