Baxi Duo-Tec Boiler Series

Baxi’s Duo-Tec range consists of combi boilers that are designed to be easy to use and energy-efficient to run. Manufactured to provide quality heating and instantaneous hot-water all through one compact unit, the boilers in this series could be suitable for homes where space is at a premium.



Boilers in the Baxi Duo-Tec range

Baxi designs each combi boiler in the Duo-Tec range to be an energy-efficient source of central heating. Installing one of these boilers could help you lower your energy bills by potentially enabling you to reduce your energy wastage**. The range includes:


Baxi Duo-Tec 24

This combi boiler could provide effective central heating to a smaller home with 1-2 bedrooms, up to 10 radiators and 1 shower room.


Baxi Duo-Tec 28

This boiler unit could be ideal for a property with 2-4 bedrooms, up to 15 radiators and 1-2 bathrooms.

Baxi Duo-Tec 33

This 33kW boiler could deliver quality central heating to a medium-sized home with 3-4 bedrooms, 15 radiators and 1-2 bathrooms.


Baxi Duo-Tec 40

The boiler with the largest kW output in the range, this system is designed to be suitable for larger homes with higher hot-water demands, typically those with 4 or more bedrooms, 20 radiators and 2 or more bathrooms.


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Key features

  • 7-year manufacturer-backed warranty***
  • Energy-Saving Trust Endorsed
  • On-demand hot-water
  • Compact in size
  • Easy-to-use controls
  • A-rated for energy efficiency
  • Designed for ease to install and service


About the Baxi Duo-Tec range

Endorsed by the Energy Saving Trust, the combi boilers in Baxi’s Duo-Tec range are designed with features that are created to reduced energy wastage and provide you with an energy-efficient way of heating your home. With easy-to-use controls, monitoring and adjusting your central heating could be a simple thing to do; installation could also be an easy task for your installer.

These combi boilers are also manufactured to be compatible with selected smart thermostats, so you could control your home heating whilst on the go with the use of an interactive app! All boilers in the range come with a standard 7-year manufacturer’s warranty, so you could have peace of mind in knowing that you could receive a repair or replacement in the event of a fault***.


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*5% online discount is available to domestic gas and LPG customers who receive an online quote for all boiler brands. £50 additional discount available on all like-for-like system swaps excluding Ideal Logic HE24 and HE30 boilers & Ideal Logic HO12 & HO15 boilers and an additional £100 discount is available on conventional to combi, and combi to conventional boiler swaps. Online discounted price is only available for the duration of the 14-day quote validity which starts from the day the quote was given. HomeServe include a filter as part of your quote as this is highly recommended by the boiler manufacturer as a key component in maintaining boiler health, functionality and may potentially be looked upon favourably by manufacturers when assessing warranty work. This filter can be removed at the customer’s request. Quote also includes a Honeywell CM727 programmable thermostat for all combi boiler installations as this is a legal requirement as part of the Boiler + legislation introduced 6th April 2018, and cannot be removed from the installation unless; it is replaced with an alternative smart thermostat; or another energy saving measure as listed in the Boiler + legislation or if an smart thermostat already exists within the property. This offer cannot be used in conjunction with any other offers. HomeServe have the right to withdraw or change the offer at any time. Online discount is automatically applied when the customer gets a quote using the online quote system at and as long as the customer meets all the above criteria.

**Source: Saving calculated when replacing G-rated with A-rated boiler in a semi-detached house.

***Subject to an annual service at the customer's expense. 10-year warranty option only available on Worcester Bosch and Ideal gas boilers.