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    Baxi Duo-tec Combi Boilers

    Baxi Duo-tec Combi Boiler prices start from around £708.88 and go up to £1,133.59 including VAT and excluding installation.

    Baxi Duo-tec Combi Boilers

    The Duo-tec combination gas-fired boiler is Baxi’s best-selling heating system to date – largely thanks to being named the CORGI boiler of the year.

    It measures in at 780mm (H) x 450mm (W) x 345mm (D) and comes in four heat outputs of 24kW, 28kW, 33kW and 40kW to suit most small, medium and large-sized homes. As it doesn’t require any separate tanks or a cylinder, this model is also perfect for properties that are tight on loft or storage space.

    Baxi’s Duo-tec Combi is supported by a 7-year warranty and will set you back anything between £708.88 and £1,133.59.

    Boiler Energy Efficiency Credentials

    Designed to be energy efficient and help you reduce your carbon footprint, the Energy Saving Trust endorsed Duo-tec Combi has a seasonal efficiency of 91.1% and boasts a SEBDUK A rating. It uses up to 40% less electric annually and is fitted with a built-in automatic gas-adaptive function that enhances combustion efficiency. Experts say that the Duo-tec saves actually around 88-91% of energy, making it one of the top performing boilers on the market.

    Duo-tec Combi Technology and Main Advantages

    This popular combi boiler by Baxi features built-in frost protection, as well as a backlit display and user-friendly controls to give you more control over temperatures and the amount of energy you use. It has also become a real favourite with installers because it is easy to install and service.

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

    • Duo-tec 24kW Combi – 9.8 litres per minute
    • Duo-tec 28kW Combi – 11.5 litres per minute
    • Duo-tec 33kW Combi – 13.5 litres per minute
    • Duo-tec 40kW Combi – 16.4 litres per minute

    A pre-plumbing jig makes the appliance compatible with spaces that previously housed a conventional boiler and helps to save time and money during installation. Plus, the Duo-tec Combi is compatible with a Multifit flue kit to give you flexibility when it comes to deciding where to install the boiler.

    Is the Baxi Duo-tec Combi the right Boiler Type and Size for Your Home?

    The smallest unit has a 24kW output and delivers a flow rate of 9.8 litres per minute to comfortably heat a small property with 1 bathroom and up to 10 radiators. Then there is the 28kW unit, which is suitable for small to medium properties with 1 bathroom and around 15 standard-sized radiators. Both the 33kW and 40kW Duo-tec Combi units are designed for larger homes with higher heating and hot water demands. However, this information is to be as a rough guide and you must ask a Gas Safe engineer to assess your home and usage habits to ensure you select the right boiler type and size.


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    A-rated conventional boilerSave money on your gas bill
    Class 5 NOx ratingEnvironmentally friendly
    Won CORGI boiler of the yearAward-winning
    Easy-to-use control system with clear displayGives you more control over room temperature and you can see in the dark
    Multi-fit flue kitAllows for versatile siting
    Built-in frost thermostat Water will never freeze over
    7-year parts and labour warrantyConfidence and peace of mind

    Our Honest Opinion of the Baxi Duo-tec Combi Boiler

    The fact that the Duo-tec Combi is Baxi’s best-selling boiler and won CORGI Boiler of the Year 2008 reinforces just how decent this model really is. It provides optimum performance and is first class when it comes to reliability and energy efficiency. This appliance also boasts a modern design with a stylish gloss finish so that it will look smart in virtually any setting.

    In addition to all of that, it’s not only a user-friendly appliance but it has also been developed with the installer in mind. Baxi has even given the Duo-tec Combi a huge 7-year warranty, which underpins their confidence in the reliability of this fantastic combination boiler.

    Advice on Boiler Quotes and Gas Safe Engineers

    Before choosing a boiler for your home, we recommend you ask a certified engineer to provide you with their recommendation. It’s also a good idea to request quotes on the boiler and installation from both local and national companies to ensure you get the best deal. Once you’ve selected the right boiler, you must make sure your installer is Gas Safe registered and qualified to carry out the work. It’s easy to check – simply ask to view their Gas Safe ID card or run a search at the official Gas Safe Register website. If you haven’t the time to do the legwork, please don’t hesitate to use our free online service to obtain no-obligation quotes from registered businesses and professionals.


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    One thought on “Duo-tec Combi

    1. Do you actually supply/sell these yourself ? I am interested in a baxi duo tec 24 combi how much would this cost with delivery and how soon could it be delivered ws72dr please ?

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