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Baxi EcoBlue Heat

The Baxi EcoBlue Heat is a compact and energy efficient conventional boiler that can be installed in a kitchen cupboard.

According to Baxi, the EcoBlue Heat is the ideal replacement for an old inefficient conventional boiler because it’s A-rated and allows for hassle-free installation. This boiler is also quite small and can be sited in a kitchen cupboard or installed almost anywhere else in the home. It comes in five heat outputs from 12kW to 24kW, making it suitable for most properties that already have a traditional heating system in place.

How Much Does this Boiler Cost?

You’ll need to fork out between £760 and £910 for the Baxi EcoBlue Heat, depending on whether you need the 12kW, 15kW, 18kW, 21kW or 24kW model. As prices vary from one company to the next, it’s always wise to shop around to find this boiler at the best price. And don’t forget, you’ll also need to get quotes on the installation, which can sometimes work out cheaper when you choose a local Gas Safe registered installer. Nevertheless, you shouldn’t rule out national companies because some often run special deals and promotions for customers.

How will I know if this Boiler is Suitable for My Home?

The Baxi EcoBlue Heat is a heat only boiler (often called a conventional, traditional or regular boiler) and will require separate components, such as tanks in the loft and a hot water cylinder in the airing cupboard. Heat only boilers tend to be a good choice for homes with multiple bathrooms because they can meet greater hot water demands. The downside to needing additional tanks and a cylinder is that these boilers take up more space.

Before you purchase the EcoBlue Heat or any other new boiler, you must make sure you know the correct type and size (kW output) for your home. You can find out this information by asking a Gas Safe registered engineer to visit your property, as they can help you to determine which model is most suitable.

Is it a High Efficiency Boiler?

Yep. The Baxi EcoBlue Heat has an efficiency of 89.2%, so it is an ErP A-rated boiler. If you currently have an old conventional boiler and decide to swap it for this boiler, you should see a difference in your fuel bills. This boiler is also Energy Saving Trust endorsed and can help you to achieve a low carbon lifestyle. You can even improve efficiency by installing the boiler with a Megaflo Eco Cylinder, which provides exceptionally high levels of end-user comfort and hot water performance as well.

Does this Boiler have a Good Range of Controls and Features?

The controls are a little basic and include a central heating temperature switch, along with a reset button and LED status and fault code display. This boiler is supplied with a top central, flue, a choice of flue lengths and a special wall-mounting plate so that you can choose where the appliance is to be installed. It has front and side access to all components and doesn’t need a pump overrun or extra wires, making installation and annual services easy and less disruptive.

How long is the Warranty on this Boiler?

Baxi’s EcoBlue Heat is backed by a 2-year parts and labour warranty, which isn’t very long when you compare it to the warranties that come with some of the brand’s other boilers.

Baxi EcoBlue Heat By Size and Price

ModelTypeDimensionsMaximum Flow RateOutputEfficiency RatingTypical Price
EcoBlue Heat 12Heat OnlyH – 625 mm
W – 370 mm
D – 270 mm
N/A12 kWA 90% and above£760
EcoBlue Heat 15Heat OnlyH – 625 mm
W – 370 mm
D – 270 mm
N/A15 kWA 90% and above£800
EcoBlue Heat 18Heat OnlyH – 625 mm
W – 370 mm
D – 270 mm
N/A18 kWA 90% and above£830
EcoBlue Heat 18Heat OnlyH – 625 mm
W – 370 mm
D – 270 mm
N/A18 kWA 90% and above£830
EcoBlue Heat 21Heat OnlyH – 625 mm
W – 370 mm
D – 270 mm
N/A21 kWA 90% and above£870
EcoBlue Heat 24Heat OnlyH – 625 mm
W – 370 mm
D – 270 mm
N/A24 kWA 90% and above£910

Summary of Important Information

  • Priced between £760 and £910
  • Heating output of 12kW, 15kW, 18kW, 21kW or 24kW
  • Dimensions of 625mm (H) x 370mm (W) x 270mm (D)
  • Uses gas as its fuel source
  • A-rated for efficiency
  • Megaflo Eco Cylinder compatible
  • 2-year warranty as standard

Pros and Cons

Below, we’ve shared what we believe are the main pros and cons of the Baxi EcoBlue Heat.


  • Fits in a kitchen cupboard
  • Suited to small, medium and large-sized homes
  • Easy to use and service
  • Comes with a choice of flue lengths – can be installed virtually anywhere
  • NOx Class 5 boiler – kinder to the environment
  • Provides maximum energy efficiency – reduce fuel bills and carbon emissions
  • Compatible with Megaflo Eco Cylinders – increases energy efficiency and improves comfort levels and hot water performance


  • Baxi boilers have and overall Which? score of 54%
  • Requires separate cylinder and loft tanks
  • User controls are basic
  • 2-year warranty – would prefer a longer standard guarantee
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