What’s The Best Compact Boiler For The Money? [Spoiler: It’s The Baxi 600]

Today, we’re going to delve deep into one of the best product releases in the last 12 months; the Baxi 600 compact combi boiler.

Looking to upgrade your appliance, but overwhelmed by the choice?

This quick review and buyer’s guide is going to help you understand EVERYTHING you need to know to make a purchase decision.

To make that decision less complicated, we’ve searched high and low for the best compact boilers in the UK. And, this is our top pick…

The Baxi 600 Compact Boiler

At the tail end of last year, Baxi unveiled their new compact boiler; the 600.  

And we can tell you right now, it slotted itself directly at the top of shortlists for thousands of homeowners in the UK that are looking for a new compact boiler.

Here’s why…

Reduced Installation Costs

Let’s start with something that I usually wouldn’t; the installation cost of a Baxi 600.

Working in a plumbing merchant, I know your average boiler is 40kg. A Worcester 30I for instance, was 42kg packed. And, that might not seem very heavy, but try hanging one of those on a wall, without any help; it’s no fun. 🙁

And this is why installers love the new Baxi 600 compact; it weighs just 29kg.

I can tell you straight up, installers prefer installing small boilers like the Baxi 600, over something heavier. So, if they’re quoting up for an installation of a Baxi 600, it’s going to be cheaper than a Worcester 30I, just because it’s easier to install…


Not sure how much your new boiler installation should cost, or where to get it from? Click here to read our boiler installation cost guide.

Low Servicing Costs

Another thing homeowners don’t account for is the servicing costs of a cheap combi boiler. Engineers hate them, and if parts need replacing, due to lack of supply, they’re not exactly cheap.

The Baxi 600 combi? It utilises a pipe behind facility that all engineers love. Combine that with a clear and spacious internal layout of components, that makes for easy servicing. And, being one of the biggest boiler brands in the UK, if parts do ever fail, they’re in plentiful supply, so won’t break the bank.

All that combined means it takes less time, and costs less money, by the way…


Dirt Cheap 

Before we delve into the technical details and suitability of the Baxi 600, let’s talk about price. When I first saw the price of their new release, I had to do a double-take.

If I worked at Baxi, the first thing I’d do is double check the margins on the 600, as it’s ridiculously cheap when you stack it against comparable products over at Worcester and Vaillant.

As Baxi are a premium brand, you’ll find their prices are typically up there with the most expensive. That means Worcester Bosch and Vaillant. But, whilst the 600 is a premium product, the price definitely isn’t.

You’ll be able to grab the Baxi 624 for around £750. The 630 you’ll get for around £825-850.

If you don’t know how cheap that is, do a quick search for comparable products from Worcester Bosch. A quick Google search for the Worcester 32CDI Compact boiler is going to show prices of £1,200 and beyond.

So, depending on the kw boiler you need, you’re talking about a saving of around £300 or more, for a product built by a brand that’s considered one of the best in the industry.

You guessed it…Cha-Ching! 😊

Tiny Dimensions

It’s all good and well saying a unit is small. But, just how small is the Baxi 600 compact boiler? 

Width = 390mm

Height = 700mm

Depth = 285mm

It’s small!

That compares to the Ideal Logic Plus, and the Worcester Bosch Compact. Basically, this is a small and compact boiler that you can install in tiny spaces like:

  • Airing cupboards
  • Kitchen cupboards
  • Under your stairs
  • In a loft

Awesome Output

There are two options when it comes to the Baxi 600 compact; the 624 (24kw) and 630 (30kw).

Now, you NEED to get an engineer to spec your property to determine the exact size boiler you need.

A 24kw is generally suitable for flats, apartments, or 2-3 bedroomed properties with low heating and hot water demand. And, a 30kw could power anything up to a 4-bedroom semi, although it’s typically suited to 3-bedroomed semis. There’s a guide on what size boiler you need here.

High Flow Rate

You’ll get high output here for domestic hot water.

On the 624 you’ll have access to 10.2L per minute and with the Baxi 630, you’ll get 12.2L per minute.

Ridiculously High Warranty

I’m always interested in the warranty that a boiler manufacturer offers on their products. It’s a sure sign of what THEY think of their own boilers. After all, if they think it’s reliable, they’ll offer a long warranty. If they don’t, well, they’ll offer a short one.

Typically, we’d never advise getting a boiler with no less than 2-years warranty. Ideally, you want to be pushing towards 5-years.

And, that’s where the Baxi 600 compact boiler is leaps and bounds above most of the competition.

You’ll get a HUGE 7-year warranty with the 600. If they’ve got the confidence in their product to offer that kind of warranty, then we’ve got confidence in it too.

Hugely Efficient

You’re going to struggle to find a Baxi boiler that isn’t efficient; the 600 certainly doesn’t buck that trend.

Both the 24kw and 30kw Baxi 600 are A-rated. That means they work at around 89% efficiency. The Energy Saving Trust produced a recent study that found an old G-rated boiler in a semi-detached property, could cost up to £305 per year extra (yes, per year!) to run, compared with an A-rated equivalent.

Given installs for a Baxi 600 Compact boiler can start as low as £1,750, it doesn’t take you long to recoup your investment, and save the planet a little at the same time.

Smart Technology

It’s not just the external design of the Baxi 624 and 630 that’s sleek; the behind-the-scenes tech is pretty-cool too.

If you’re like most homeowners in the UK, you’ll be transitioning, slowly creating your perfect smart home. The compact Baxi boiler is the next step, as it gives you the ability to operate your boiler from a smart phone or tablet.

But, it doesn’t stop there. New Government legislation means all new boiler installs need to be Boiler Plus (Building Regulations Part L) compliant.

And besides its high efficiency, the Baxi 600 surpasses regulation guidelines when installed with Baxi’s new smart thermostat; uSense.

The Review Verdict’s Out, But What Is It?

We’re impressed all round with the new release from Baxi. They’re a premium brand, offering an innovative and premium product, but at a price that’s far cheaper than we’d expect.

If you’re looking for a new compact combi boiler, you should have the 624 or 630 on the top of your short list. And if you do eventually buy it, you’ll have plenty of extra pound notes to rub together, compared with buying a compact boiler from other leading brands.

What’s Next?

Hopefully our review and buyer’s guide to the best compact boiler has helped you decide whether the Baxi 600 is for you.

Still got questions? Drop a comment below and we’ll get back to you as soon as possible.




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