Potterton Promax Ultra 40kW Combi Boiler

Thanks to its high-efficiency rating of 89.1% and an ErP A-rating for both heating and hot water, the Potterton Promax Ultra 40kW is a highly efficient gas boiler that could potentially help you to save money on your energy bills.

The Potterton Promax Ultra 40kW is the most powerful boiler in its range. With an output of 40kW, this combi boiler can heat a large home with up to 20 radiators and 2 bathrooms. However, if you feel that your home does not require this demand for heating and hot water, the Potterton Promax Ultra range also has a 24kW, 28kW, and 33kW combi boiler, which may be better suited for your home.

Combi boilers are also perfect for smaller homes with limited space but need instant hot water. This is because they combine both the water heater and the central heating in one unit, removing the need for any additional hot or cold water tanks as you would need with a regular or system boiler.