Combi Boiler Prices & Reviews 2022


Combi boiler prices start at around £500 and go as high as £2,900, but bear in mind this is typically for the unit only and does not include Gas Safe installation. 

A combi boiler is a compact unit that provides on-demand heating without additional components like a cold-water tank or hot water storage cylinder.

This ability to instantly deliver hot water without taking up much space means that combi boilers are generally the most energy-efficient and space-saving options on the market. And that said, there are so many combi boiler options to choose from that it can become a tricky selection process.

Depending on the size, power, brand, insurance or warranty, and installation costs, combi boiler prices can vary from £500 to £2,900. This means that the combi boiler is energy efficient, compact and practical.

Not to mention that you are bound to find something in your price range. All of this makes combi boilers a popular choice in the UK.

Let’s talk more about why you should consider a combi boiler for your home.

Five Reasons Why Combi Boilers Are Great

1. Energy efficiency

Your combi boiler saves energy by taking water directly from the mains and only heating water that you need to use each time you turn on a tap. Minimising your energy wastage and reducing your carbon footprint is one of the main perks of owning a combi boiler.

2. Instant hot water

Running out of hot water for your bath or shower is a nuisance. Combi boilers provide instant hot water instead of a limited amount of warm water every day. This means you won’t have to wait around for a relaxing hot bath if someone has already had a bath or shower before you.

3. Neat and compact

A majority of condensing combi boilers are compact and sport neat and modern designs. As a result, they can free up valuable space in smaller homes and flats without compromising on function or aesthetics.

4. Just the boiler

Unlike other boilers, which require a separate tank or cylinder, combi boilers don’t require the installation of any additional components. This is in comparison with system boilers which require a hot water cylinder and heat only boilers that need a tank in the loft and a cylinder in the airing cupboard.

5. Easy to install

With compact sizes and no additional components required, combi boilers are cheaper and easier to install. Your engineer can finish installing your combi boiler in no time in comparison to other boilers, which require installing separate cold-water tanks or hot water storage cylinders.

Don’t rush out to shop for your combi boiler just yet! Before buying a new boiler, it’s best to consult with a reputable heating engineer who is qualified to install your boiler of choice. Gas Safe registered engineers should install all gas combi boilers.

Oil-fired combi boilers must be installed by OFTEC registered technicians. Your engineer can assess your requirements, survey your home and select the correct boiler output size for your property. They can help you make an informed decision when it comes to which combi boiler will best suit your needs.

Combi Boiler Sizes and Prices

The size of your house determines the size of your boiler, which consequently determines the price of your combi boiler. Finding the right size combi boiler is the key to getting the most out of your boiler and keeping your fuel bill low.

A boiler that’s too large for your home will waste energy and needlessly cost you more every month. Every penny adds up!

On the contrary, buying a boiler that is too small for your home can be a great inconvenience. Not only will the boiler produce too little hot water, but the water also won’t be heated optimally.

You’ll need a qualified heating engineer to properly assess your property and determine the correct size combi boiler for your home.

However, you can still get a rough idea of the boilers that will be appropriate for you. It’s always a good idea to compare models, warranties and costs before settling on one specific boiler.

Combi Boiler Installation Costs

Besides the cost of the combi boiler itself, you’ll need to pay for the installation. That’s unless the cost of your new boiler includes the installation – that’s always worth checking with the supplier.

Luckily as combi boilers don’t require any additional equipment, the installation will be quick and relatively cheap. The actual installation costs are dependent on your previous boiler and the amount of work involved to remove it.

Upgrading to a new combi boiler has the fastest and easiest installation process. This is made even quicker if the new boiler is installed in the same spot as the old one.

Suppose you don’t already have a combi boiler installed. In that case, the installation process can be a little more expensive and take a little longer, too.

Swapping a system or conventional boiler for a combi involves re-plumbing pipes and removing all the separate equipment such as the cold-water tank. Always ask for a quote before going ahead, just to make sure you’re aware of all the possible costs.

While costs can vary, here’s what you can expect:

  • Replacing a combi boiler with a combi boiler in the same place: £550 – £670.
  • Replacing a combi boiler with a combi boiler in a different location: £1,400 – £1,700.
  • Replacing a system boiler and hot water storage cylinder with a combi boiler: £2,000 – £2,700.

Top-Rated Combi Boilers by Brand

As mentioned, the best combi boiler brands include:

  • Worcester Bosch Combi Boilers.
  • Viessmann Combi Boilers.
  • Alpha Combi Boilers.
  • Vaillant Combi Boilers.
  • Ideal Combi Boilers.
  • BAXI Combi Boilers.

Gas Combi Boiler Prices Final Thoughts

Beginning to shop for a new combi boiler can be a stressful process, and the sheer number of options can be overwhelming.

There’s a massive variety of brands and models that may suit your needs, so it’s best to stick with brands that are reputable and to reach out for advice from the professionals to avoid making the wrong choice.

Considering that a new boiler is a substantial investment in your home, you may want to consider a tried and tested supplier to safeguard you from disappointment and loss of money.