Size matters – at least, it does when you’re looking for a cheap combi boiler for your small flat.

When it comes to small properties, combi boilers are usually the number one choice. You’ll get instant hot water, and they usually come in compact sizes. It also means you won’t need any bulky hot and cold water tanks – so it cuts down on waste.

If you’re not planning on staying in your small flat in the long-term, a cheap combi boiler is probably your best choice. Below, I’ve put together some of my top tips to help you find the right cheap combi boiler for the job.

1. Output and flow rate

The main thing to bear in mind when considering a cheap combi boiler is to ensure the output and flow rate will be suitable for your property. If you have a small flat, chances are you won’t need a boiler with a high central heating output. You should also get a certified heating engineer to conduct a flow test to determine the water pressure in your flat – there’s no point in buying a boiler with a 13 litre per minute flow rate, when you’re only getting 11 through your taps.

2. Compact size

If you own a small flat, you probably appreciate all the extra space you can get, which is why it’s a good idea to look at combi boiler brands that offer a compact range. These boilers are typically small enough to easily fit into a kitchen cupboard or Edinburgh press cupboard. There are plenty of cheap combi boilers offering compact options that are ideal for flats and small homes.

3. Guarantee

The length of guarantee you need will probably vary depending on how long you’re planning on staying in your small flat. Even if you’re only there for the short-term, you’ll still need one that’ll cover you if anything happens to go wrong with your cheap combi boiler. Your best bet will be a guarantee that will have you covered for parts AND labour – and preferably run through the boiler’s own brand, rather than a separate insurer.

TIP: Most cheap boilers come with a two-year guarantee, but if you really do your homework and shop around, you’ll probably be able to find one with up to a five-year guarantee for around the same price.

4. Value for money

The good thing about cheap combi boilers is that they are usually great value for money– especially if you go for an A-rated cheap combi that is particularly cheap to run. As a result, you’ll have lower fuel bills, and it’ll also significantly reduce your carbon footprint – what’s not to love?

TIP: If you’re in a small flat or house, chances are you won’t need to splurge on complex external controls or zoning, as these types of add-ons really won’t be necessary.

5. Good reputation/customer service

This is the part where you take to the internet. Just like any big purchase, I highly recommend checking out online reviews before making your final decision. If you see a lot of people complaining about recurring problems with a particular boiler brand, it could be a sign yours is a dud. Also pay attention to how any complaints may have been handled by customer service – there’s nothing worse than being left hanging when you’re having boiler trouble.

6. Readily available parts

cheap boilers tend to be manufactured with cheaper components that are more likely to fail, so it’s important that parts are readily available just in case. One of the best ways to make sure of this is to pick a brand of cheap boiler that is manufactured in the UK, but you can also check with an engineer or manufacturer before making your final decision.

7. Dedicated engineers

Even if you’re not going to be in your small flat for the long haul, your boiler will still need serviced. My main tip here is to always try to pick a brand that has its own dedicated engineers. Basically, this means that they only work on your particular brand of boiler, and know all the ins and outs about how they work – meaning you’ll get the best possible service. Agents or contractors may be used to working with several different brands, or may not even be experienced with your particular brand.


If you have a small flat, chances are a small combi boiler will provide you with all the heating and hot water you need. And if you’re not planning to stay in your property long-term, a cheap boiler will do the job nicely. Ensure the output and flow rate match up to your flat’s specifications, as there’s no point spending more than you have to. Check the guarantee will last at least two years and cover parts and labour – with parts readily available, just in case. And don’t forget to check the online reviews before you buy!