When purchasing a new or replacement system boiler it is important to note that you will need to accommodate for an additional hot water storage tank. This is because system boilers are fed cold water directly from the mains and then the water is heated and transferred into a sealed hot water tank for when you need it. This will require more space in your home, therefore, a system boiler is not recommended for homes with limited space. However, if space is not limited in your home and you have a high demand for instant hot water, a system boiler could be perfect for you.
The Potterton Ultra System 21kW is one of the more powerful system boilers in this range, with the ability to heat a medium-sized home with up to 15 radiators and a bathroom. The Ultra range has 5 boilers with outputs of between 12kW and 24kW, so if you feel that your home has a higher demand for heating and hot water, the Ultra 24kW is available. However, if your home has lesser demand, the Ultra 12kW, 15kW, or the 18kW could be better suited for your home.
