Vaillant EcoTEC Pro 28 Combi Boiler Review (Prices & Alternatives)

If you’re looking for a new boiler, you’re on the right track by investigating the Vaillant EcoTEC Pro 28 combi.

As we’ve already covered in our review of the best combi boilers, Vaillant is up there with big name brands such as Worcester Bosch, Baxi, and Ideal Boilers.

Is The EcoTEC Pro 28 Big Enough For Your Property?

There’s no point boring you with the full review of the Pro 28, if it’s not suitable for your property.

This combi boiler is suited to properties that have 1-3 bedrooms, under 8 radiators, and with only one shower or bath running at once.

Combi boilers heat hot water on demand, so they have no need for a water storage facility, such as a cylinder. That’s a good thing in terms of space-saving, but you really need to make sure that this is powerful enough.

If you’re property is smaller than this, the EcoTEC Pro 24 is an option.

Not sure which size boiler you need? Use Heatable’s clickable form and the most suitable boilers will pop up at the top of the screen.

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Grab your fixed price online by 3PM, and get next-day boiler installation.

Worcester boilers installed from as little as £1,795.

Vaillant EcoTEC Pro 28 Review


Let’s face it. Price is a big deciding factor when it comes to the boiler you’re choosing to buy. And, Vaillant aren’t exactly known for being the cheapest on the market.

That said, the cheap boilers tend to have low warranty, and for good reason; the build quality is sub-par.

Currently, prices for the EcoTEC Pro 28 sit around the £980-1,050 mark. There’s a good chance your installer is going to get a much better deal, given they probably buy 10-20+ boilers per month from the local merchants.

My advice? Get some quotes from local installers, and get them to purchase the boiler on your behalf. You compare them back to back with Worcester prices here.

Installation Prices

So, you’re looking at around £1,000 for the boiler, but other parts are going to be needed to complete the installation. Things like a boiler filter for protection, copper pipe, a flue, copper fittings and so on.

All in materials for the job are likely to cost around £1,250. We’d expect to budget a minimum of £750 on top of that for the cost of installation. However, you might find a local installer to do it cheaper.

In total, you’re looking at around £2,000 to install an EcoTEC Pro 28. That’s similar to what you’ll pay for a Worcester, which come with a 10-year warranty from Heatable.

Of course, that’s going to vary, depending on the deal your installer gets on the boiler, not to mention where you live in the country, due to the differential in labour rates throughout the UK.


I’m not really sure where to start here; there are SO many alternatives.

A few that spring to mind come from other boiler reviews we’d written, such as the Baxi 600, Worcester 30I and Ideal Logic Plus. Realistically, you’ll be able to get those installed at a similar cost.

Personally, I’d get quotes from a local installer for a Pro 28, then compare that directly to alternative companies. And, one great alternative that’s recently surfaced, comes from Heatable.

They’re part owned by Worcester Bosch, and that means the prices the installers get on boilers, is ridiculously cheap. That saving is passed on to you, and you end up with a top quality boiler, and below average cost.

We actually went through the quotation process, and found that a 30I (comparable, if not higher output than the Pro 28), comes in much cheaper. And, the warranty is good!

Worcester Bosch Greenstar i from Heatable

And, you don’t need a site visit, or even need to put an email address/phone number in, to get a quote. You can get a quote in less than 3-minutes on Heatable’s website.

Energy Savings

The first thing most people don’t consider, are the energy savings that can be had, thanks to installing a new boiler.

Old boilers AREN’T efficient, and new boilers are constantly improving. The EcoTEC Pro 28 is a A-rated boiler. That means up to 89.3% efficiency (source). Old boilers can be 60% or below. That’s not good at all, by the way.

The Energy Saving Trust have done their research. Their review of boiler replacement energy savings shows you could pocket anything up to £305 per year.

I’m not sure about you, but that’s something I can deal with 😊


Make what you will of Which? Best Buy awards, but the Vaillant EcoTEC Pro 28, has one.

More importantly, it’s Quiet Mark approved; no more sleepless nights due to a ridiculously noisy boiler. And, that can’t be said for all new boilers.

Compact Dimensions

There might be a bit of confusion here. Vaillant advertise their EcoTEC Pro 28, as having “compact dimensions”, but it’s not (technically), a compact boiler.

Compact boilers will fit in a standard sized kitchen cupboard. At 720mm x 440mm x 335mm, the Pro 28, WON’T.

What this means, is you’ll be wall hanging your combi boiler. If you’d prefer a compact boiler, we’ve written plenty of boiler reviews on those too, check them out here.

Heating Output

The heating output on the Pro 28 from Vaillant, is relatively low. It sits at 23.4kw, and that means anything but a small property, is going to need a larger boiler. Essentially, it’s comparable to Worcester’s 25I, which is the smallest in the I range.

That’s backed up with 9.6 litres per minute flow rate on hot water, which again, is tailored towards small properties.

Built-In Frost Protection

What you’ll find with most boilers, and boiler controls, is they have some element of frost protection built-in. If you’ve had problems with your boiler during extremely cold parts of the year, there’s a good chance that was due to a frozen condensate pipe.

In fact, the majority of call outs for repairs, during freezing temperatures, is due to a simple condensate blockage. And, these blockages due to ice, can be prevented by frost protection.

You’ll get that with the EcoTEC Pro 28, which means during in winter, your boiler is going to keep-on-trucking. It also means that you won’t have to pay an emergency call out fee for an engineer to fix it; always a bonus.


Within reason, a boiler is usually as good as the warranty suggests.

Is the manufacturer offering a 2-year warranty? There’s a good chance you’ll want to avoid purchasing that appliance. We’d never buy a boiler that’s got less than 5-years warranty.

Funnily enough, Vaillant only offer 2-years as a warranty. But, that can be increased right up to our 5-year minimum, simply by registering it through Vaillant Advance. Problem is, you could get a Worcester with double the warranty (10-years) from Heatable, which seems like a no brainer to us.


It’s not something most people think about when buying a new boiler, but the ease in which a boiler can be serviced and repaired, is going to have a bearing on costs, for you.

Not only is the Vaillant EcoTEC Pro 28 relatively easy to install, it’s easy to service too. Any Gas Safe engineer will tell you that having easy to remove side panels, and a push-fit flue, makes life a lot easier. And, that makes your life, a lot cheaper.

Controls For The EcoTEC Pro 28

Another thing worth considering, is the type of controls you want installed with your boiler. A cheap thermostat could be as little as £20. A smart thermostat such as Hive/Nest, could be £200 or more.

Vaillant actually produce their own smart thermostat, the vSmart. It’s worth considering, due to the fact that it doesn’t just give more control and flexibility over your heating, it’s a chance to save extra on your energy bills too.

Review Verdict: Should You Buy The Vaillant EcoTEC Pro 28?

If your heating engineer suggests installing a Pro 28, I certainly wouldn’t go strongly against them. A lot engineers prefer one brand over another.

However, based on purchase price, installation costs and overall warranty, I think there are better options.

The likes of the Baxi 600 for those looking for a compact boiler, the Ideal Logic Plus with a 7-year warranty, and a range of Worcester boilers at a similar price (with a 10-year warranty), mean that the Pro 28 isn’t the most worthy of your cash.

Worcester Bosch boilers - Trustpilot review

What Are Your Options?

Before you decide, you need some solid quotes on the table. Typically, local installers are the cheapest, so that’s a good place to start.

You can get multiple quotes from boiler installers here. Make sure you get itemised quotes so you can compare them back-to-back (i.e. are they fitting a boiler filter, will they hot flush the system).

Then for further comparison’s sake, I’d head over to Heatable to see how their prices compare. You can get quotes online (without even putting in your email/phone number). As they’re a new kid on the block for online boiler comparison, there’s a good chance you’ll get a cheap deal on your new boiler, from a top brand.

In fact, we wrote a big guide on boiler replacement here. That compares quotes we received from Heatable and Help-Link. And, there’s even a quick guide on prices from British Gas. Probably worth checking out, before you fork out £2,000 or more on a new boiler.

What’s Next?

Thanks for reading our review of the Vaillant EcoTEC Pro 28. Hopefully that gives you an idea of what the Pro 28 is about, prices for installation, and the range of alternatives that are out there.

Got questions about boilers? Drop a comment below and we’ll get back to you as soon as possible.




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