Combi boilers are ideal for smaller homes as they work as both a water heater and a central heating boiler, wrapped into one cost-effective unit. This removes the need for a hot water cylinder or cold water tanks, as you would need for a system or regular boiler. This also means that this boiler model could be installed neatly in your standard kitchen cupboard (depending on the model).
The Vaillant EcoFit Pure 830 has a central heating output rating of 26.5 kW, perfect for smaller homes with up to 15 radiators. It also has a hot water output of 30kW, ideal for homes with two bathrooms. The EcoFit Pure 830 sits in the middle of its range concerning power, therefore, you feel that your home requires a higher demand for heating and hot water, the EcoFit Pure 835 is available. However, if you have a smaller home with only 10 radiators and one bathroom, the EcoFit Pure 825 may be a better option for you.
