Baxi Duo Tec Combi Boiler Review (2021): Should You Buy It?
If you’ve been looking for a new boiler, there’s a good chance you’ve already considered Ideal, Vaillant & Worcester. But, Baxi Duo Tec combis are usually overlooked. We aim to remedy that in today’s review.
One reason the Baxi Duo Tec tends to be an excellent choice, is price. At time of writing, the 24kw Duo Tec HE is priced at around £700; like the Ideal Logic Plus 24kw.
Table of Contents
Baxi Duo Tec Guarantee
Baxi offer an extensive 7-year warranty for their Duo Tec range. So, in that respect, it matches the Ideal Logic Plus.
And, the 7-years on offer from Baxi, is more than enough. Typically, we’d suggest avoiding boilers with less than 5-years in warranty. The cost of repairing boilers isn’t exactly low, so you want to avoid being responsible for them, for as long as possible.
The warranty will be upheld, as long as a Gas Safe registered engineer services the boiler once a year.
Alternatively, you can get a Worcester boiler fitted at a similar price, but with an extra 3 years warranty (10 years total) here.
Baxi Duo Tec Combi Boiler Prices
The Baxi Duo Tec might be one of the best boilers out there, but how much does it cost? And, how does that compare to equivalent combi boilers from their main competitors?
| Boiler | Price |
| Baxi Duo Tec 24kw | £775 |
| Baxi Duo Tec 28kw | £875 |
| Baxi Duo Tec 33kw | £950 |
| Baxi Duo Tec 40kw | £1,025 |
The Ideal Logic Plus is the direct competitor here, given the warranty is exactly the same. And in terms of price, they’re similar too. Ideal Boilers tend to run regular promotions, so you can expect to pay anything from £700-800 for their Logic Plus 24kw. Basically, the same price as the Baxi Duo Tec.
With Heatable partnerting with Bosch, you’ll get similar prices on Ideal and Baxi boilers from a local installer, as you would with Heatable. You can check out prices using their boiler price calculator.
Baxi Duo Tec Dimensions
We’re regularly asked which boilers will fit in a standard kitchen cupboard. Unfortunately, the Baxi Duo Tec isn’t one of those boilers. It’s 780mm high and 450mm wide, making it just slightly too big.
Customers looking for a smaller boiler will tend to go for a Worcester Compact CDI or an Ideal Logic Plus. For those looking for a longer warranty (10-years), the Ideal Vogue is also an option.
If you’re looking for a boiler that fits into small spaces and are stuck on the Baxi brand, we’d suggest checking out their latest release, the Baxi 600 compact boiler.
Energy Rating
It’s a pretty standard thing these days that combi boilers have a high energy rating, and the Baxi Duo Tec range is no different. It’s 89% efficient which sounds good, but it’s slightly lower than the Worcester range.
That said, there are new rules for boiler installers, meaning they need to be installing heating systems that comply with Boiler Plus. And, the Baxi Duo Tec is Boiler Plus compliant, not to mention, being endorsed by the Energy Saving Trust.
What kind of fuel does your boiler use?
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Online Reviews
I’m a sucker for online reviews. Whether I’m buying a boiler or a pair of hiking boots, I want to see what the people that own this product have to say.
And, although you’re not going to find 100s of reviews on Amazon like with other products, there’s a review site called Reevoo, where Baxi is quite active.
I stuck in the Baxi Duo Tec, and it popped up with over 400 reviews, with an average review rating of 9.3/10.
Baxi Duo Tec Output
| Combi Boiler | Heating Output | Hot Water Output | Flow Rate | Suitable For |
| Duo Tec 24HE | 20kw | 24kw | 9.8/lpm | 1-2 bedroom apartments |
| Duo Tec 28HE | 24kw | 28kw | 11.5/lpm | 2-3 bedroom houses |
| Duo Tec 33HE | 28kw | 33kw | 13.5/lpm | 4-5 bedroom houses |
| Duo Tec 40HE | 33kw | 40kw | 16.4/lpm | 5+ bedroom houses |
Although this gives a rough guide of what size Duo Tec boiler you need, it’s always worth using a boiler size calculator like this one. They’ll be able to tell you which is the most suitable Baxi Duo Tec to install.
The Difference Between a Duo Tec HE & GA
There’s two simple differences between the Duo Tec HE & GA models.
First, “GA” stands for gas adaptive. If your property isn’t connected to mains gas and you run LPG, the GA model is the one you’ll want; you won’t need to purchase any adapters to run LPG.
Secondly, the standard warranty on the Baxi Duo Tec GA is just 2-years, and that’s quite a drop from the 7-years that customers get with the HE. Of course, the work around for this is to purchase an LPG conversion kit for the HE model.
Like the Duo Tec GA, the models include the following:
- DuoTec 24 GA
- DuoTec 28 GA
- DuoTec 33 GA
- DuoTec 40 GA
The Alternatives
Worcester Bosch have a similar entry level boiler. For smaller properties, they have the 25I, and for larger properties they have the 30I. Given Heatable offer Worcester boiler installation so cheap, the 25I and 30I are great alternatives; you can get your price online here.
We’ve also reviewed the best combi boilers here.
Another option comes straight from Baxi; the Platinum HE. This is essentially a Baxi Duo Tec HE with a few upgraded parts. What this means though, is that it comes with an impressive warranty of 10-years. And, as it only costs around £200 more, it’s certainly worth the extra cash.
The Baxi Platinum HE models are as follows.
- Platinum 24 HE
- Platinum 28 HE
- Platinum 33 HE
- Platinum 40 HE
We’ve created a detailed guide to the Baxi Platinum here.
The Review Verdict
We’d certainly have no problems fitting a Baxi Duo Tec HE over a Worcester equivalent. Many of the Baxi’s we’re called out to fix are over 15 years old which is certainly a testament to their quality.
Need a new boiler installed? Still not sure if the Baxi Duo Tec is right for you? A heating engineer will be able to assess your property, decide on the best boiler, and give you quotes (you can get a free on-site quote here).
Want to compare prices with the Worcester Bosch equivelent? Use Heatable’s boiler price calculator and get your fixed price online.