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    Potterton Promax Ultra Combi Boilers

    A new Potterton Promax Ultra Combi Boiler will cost between £963.11 and £1,309.80 including VAT and excluding installation.

    Potterton Promax Ultra Combi Boilers

    Manufactured by Potterton, the Promax Ultra Combi is available in four different heating outputs including 24kW, 28kW, 33kW and 40kW so that it can be installed in a range of property types and sizes.

    It measures 763mm (H) x 450mm (W) x 355mm (D) and offers a hot water flow rate up to 16.4 litres per minute. The boiler takes up little space, is easy to fit and will provide heat and for your radiators and domestic hot water on demand.

    Designed to suit most small, medium and large-sized properties, the Promax Ultra Combi comes with a 2-year parts and labour warranty and typically costs between £963.11 and £1,309.80.

    Boiler Energy Efficiency Credentials

    You’ll be pleased to know that the Potterton Promax Ultra Combi is an A-rated boiler with an efficiency rating of 89.1%. It has low NOx emissions and is rated class 5 – best in class. Although the boiler can help to cut your energy bills straight out of the box, a wide range of optional Potterton accessories and controls are available to make the appliance more efficient and to save you even more money.

    Promax Ultra Combi Technology and Main Advantages

    As this model comes with flueing options up to 20 metres, it gives you flexibility in where the boiler can be installed. The Promax Ultra Combi also has a pre-plumbing jig, which helps to save both time and money on installation.

    The range includes four output sizes with different maximum hot water flow rates, which are as follows:

    • Promax Ultra 24kW Combi – 9.8 litres per minute
    • Promax Ultra 28kW Combi – 11.5 litres per minute
    • Promax Ultra 33kW Combi – 13.5 litres per minute
    • Promax Ultra 40kW Combi – 16.4 litres per minute

    Built-in frost protection is included to protect the appliance during the cold months of the year, and the boiler can run on natural gas or LPG (liquefied petroleum gas) without the need for a special conversion kit.

    This boiler is family friendly because it has concealed user controls, which helps to prevent children from touching control knobs and dials. There is also a clear LED display with fault diagnosis to allow you to see the temperature and status of the boiler at any given moment.

    Is the Potterton Promax Ultra Combi the Right Boiler Type and Size for Your Home?

    Potterton has designed this boiler to suit most property sizes, with options suitable for small, medium and large homes. Obviously, the 40kW model delivers the highest heating output and hot water flow rate, making it perfect for larger homes with greater usage habits. Having said that, the 33kW unit will be suitable for some large houses too. If you live in a small dwelling and have a lower demand for heating and hot water, the less powerful 24kW version will be ideal. And if your home is considered medium in size, the 28kW should be capable of meeting the needs of your household. As this is only a rough guide, you must ask a Gas Safe engineer to look at your home to help determine the right output and flow rate for you.


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    A-rated combi boiler Save money on your gas bill
    Energy Saving Trust EndorsedHigh energy efficiency
    Built-in frost protectionOptimal performance whatever the weather
    Clear LED displayDelivers clear visibility
    Concealed user controlsFamily friendly
    Pre-plumbing jigSaves time and money on installation
    Central flue and flueing options of up to 20 metres Ease of siting and greater siting flexibility
    Compatible with Potterton controlsAlternative energy and cost saving options
    2-year parts and labour warrantyConfidence and peace of mind

    Our Honest Opinion of the Potterton Promax Ultra Combi

    Since this model is a combination boiler and provides hot water on demand, you will not need to purchase or already own a hot water cylinder, cold water tank or expansion tank. This makes the Potterton Promax Ultra Combi not only a great option for a variety of homes but also properties with no or little loft and storage space.

    It’s natural gas and LPG ready, so you don’t have to be on the grid to use this boiler. You also have the option to use the appliance with a fantastic selection of additional controls to boost comfort, energy efficiency and the cost-effectiveness of the unit.

    We think the Potterton Promax Ultra Combi is a reasonably priced, user-friendly boiler that saves energy consumption and performs well in all seasons. And because it’s manufactured in the UK, your engineer won’t have any trouble sourcing spare parts when required.

    Advice on Boiler Quotes and Gas Safe Engineers

    If you want to find the best price on the Potterton Promax Ultra Combi Boiler, we advise you to shop around and get a few quotes from both local and national installers. Remember to ask for a fixed price on both the boiler and installation work to keep yourself protected from any hidden charges. It’s also important to make sure your new boiler is fitted by a Gas Safe registered professional for peace of mind that your chosen installer/company is legally allowed to work on gas appliances. You can either check the office Gas Safe Register online or take a look at the installer’s ID card to confirm their registration status.


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