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Baxi Duo-Tec 40 HE Gas Boilers

The Baxi Duo-Tec 40 HE condensing gas boiler was voted CORGI boiler of the year.

The Duo-tec combi is Baxi’s best selling boiler.

Baxi Duo-Tec 40 HE Gas Boilers  Compare Boiler Quotes

The 40kW boiler has a flow rate of 16.4 litres pure minute and can be wall mounted or fit in a kitchen cupboard.

Other points which stand out and make it a public and heating engineer favourite is that it includes a modulation ratio of 1:7; which allows it to run comfortably and efficiently.

For all of the above reasons this top of the range boiler is well suited to a larger home with up to five bedrooms and two bathrooms.

If you love the sound of this boiler but have a home with one to four bedrooms and one bathroom, dont panic you can still have a Baxi Duo- Tec boiler. It is available in a 28kW and a 33kW.

Excluding installation fees and VAT the Baxi Duo-Tec 40 HE gas boilers prices start around £970.

If you would prefer a boiler including installation fees, go to 



A seven year warranty is included for parts and labour as standard. Warranty is great for peace of mind if any problems occur.

Always ensure to read and follow the guidelines to keep the warranty valid, if you do not stick to this you will not be entitled to your full warranty. You can read some of the main guidelines here.

Baxi Duo-Tec 40 HE Gas Boilers  Compare Boiler Quotes




This boiler will be quick to install as it comes with the following pre plumbed parts: pre-formed copper pipe tails, built in filling loop, and a one metre mains cable.

Optional flues come along with boiler ensuring you can located the boiler in your desired location.

Baxi Duo-Tec 40 HE Gas Boilers  Compare Boiler Quotes

THINK combustion management system is part of the boiler; making the boiler as reliable and efficient as it possibly can be.

Gas adaptive controls which change the air and flow of gas into the boiler, ensuring it operates at the optimum combustion level possible.

This raises the energy efficiency and keeps energy costs to the minimum.



Innovative Think Combustion Management System For cleaner & lower emissions
SEDBUK A Rating Lower gas bills
Flow Rate Of 16.4 Litres Per Minute Modern and efficient
40Kw Heating Output Fuel efficient
User Friendly Controls Ease of use
Frost Protection Safety
Modulation Ratio Of 1 : 7 – Resulting in high reliability and smoother running Fuel efficient
Cuts Energy Bills Fuel efficient
Gas Adaptive Controls – Deliver Optimum Combustion Levels Ease of use
Easy To Install – Pre Plumbing Jig Help with installation
Best Suited For Larger Properties 3 plus bedroom houses
2 Years Manufacturer’s Guarantee Peace of Mind


This Baxi Duo-Tec 40 HE condensing gas boiler also available in 28kW and 33kW sells itself with the awards, ratings and reviews by the public, Gas Safe engineers and the manufacturers themselves.

Baxi Duo-Tec 40 HE Gas Boilers  Compare Boiler Quotes

A great efficient boiler available to suit all size properties with a lengthy seven year warranty.



If you would like a boiler quote or any information click here

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What our customers think

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Would recommend

Stressed when needed a new boiler but easy process with affordable finance. New boiler installed within a few days with option for next day.

Paul Jones 5 Star on Trustpilot

We were very impressed

On the day, they came on time. Lovely people, they kept everything clean. Explained everything to me. No mess, kept me informed.

Anne Cross 5 Star on Trustpilot

Great Experience

Great experience - quick to arrange, easy to work with the very responsive online team and all installed faster than expected.

Ms Baxter 5 Star on Trustpilot

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