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Baxi Duo-tec Compact Combi Boiler – Review

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Witten by Bernard Morgan (Engineer).
First Published: June 15, 2021. Updated: January 22, 2024

Boiler only price: from £1,050

(25kW boiler-only price: comparing up to five suppliers, including Screwfix and Plumbase, where possible. Correct January 2024).

The Baxi Duo-tec Ccombi boiler is available for either mains gas or LPG fuel. In this review, we have outlined all of the major features of the Baxi Duo-tec combi boiler and provided our expert opinion so that you can decide whether it’s right for your home and the needs of your household.

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About

Compact and easy to fit inside a normal kitchen cupboard. It meets the energy standards set out by the Energy Savings Trust. It is easy to install and can easily integrate with smart thermostats including Baxi’s own uSense. The Duo-tec comes with a 7-year warranty.

The Duo-tec Compact is a good boiler. But it is a different version of the discontinued Baxi 600 Combi (MK1) boiler. This is not to be confused with the Baxi Combi 2 (MK2) boilers which are the latest version. It doesn’t have the latest technology or efficiency upgrades that the MK2 has.

Key Features

  • Holds an ‘A’ energy efficiency rating and 90% efficient
  • Compact and of an average weight, which makes it relatively easy to install
  • Can be installed in a large cupboard because of its compact size, or wall-mounted, if preferred
  • Features an integrated manual control panel, which is straightforward and easy to use
  • Provides instant hot water
  • Heating output of up to 26.4kW and flow rate of up to 15 per minute

Technical Specification

Manufacturer Baxi
Model Duo-tec Combi
Condensing Yes
Efficiency Rating 92%
Energy Efficiency Class A Rated
LPG Compatible No
Warranty 7-year parts and labour warranty
Central Heating Max. Output 25, 30 and 36kW
Hot Water Flow Rate 10.2, 12.2 and 15 litres/minute
Mounting Wall Mounted
Weight 30 kg
Dimensions 700mm (Height) x 390 (Width) x 285 mm (Depth)
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Our thoughts

The Baxi Duo-tec combi boiler is a popular choice for homeowners looking for a reliable and energy-efficient boiler. It will provide continuous hot water and simultaneously run heating in a home with up to two bathrooms.

The Duo-tec Compact is based on the older Baxi 600 Combi boiler (now replaced with the Baxi 600 Combi 2). It has a different fan and heat exchanger and is less-compatible with Open Therm thermostats.

Although these boilers are currently being manufactured, they don’t contain Baxi’s latest technology. This includes more powerful and efficient fans and a more efficient heat exchanger. It also works with fewer Open Therm devices than the new 600 range.

We would recommend looking at the Baxi 600 or Baxi 800 range if this is a boiler you are considering.

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