Best 3 Combi Boilers
Best 3 Combi Boilers According to Independent reviews
January 13, 2022
Gas Boiler Prices 2020
Gas Boiler Prices 2022
May 1, 2022

2022 Combi Boilers Prices can vary from £500 to £3,000

There is quite a wide variation in Combi boilers prices across the board. Just by choosing a particular brand, boiler costs can run from £500 to £3,000.

Another point to bear in mind about costs is that there are quite a lot of factors to take into account, other than who makes the unit.

Major pricing factors such as:

  • Installation costs – what is being fitted? just the boiler, or is there additional work? (power flush, removal & replacement of radiators, relocation etc. etc.)
  • Type of warranty or guarantees.
  • Size & output of the boiler.

What is a combi boiler?

Combi Boilers PricesThe term Combi comes from the units’ ability to “combine” the properties of being a high efficiency water heater and central heating boiler.

The key feature is the delivery of “instant” hot water directly from a mains supply, instead of having to heat & then store the water first.

As soon as you turn on the tap, hot water will flow.

Primarily due to ease of installation, their compact dimensions and the fact that hot & cold water storage tanks are not needed, Combi boilers are a very popular choice.

Especially for homes with fewer occupants, such as a flat or small properties where space is at a premium.

Combi boiler features: 

  1. Compact, can be fitted in small spaces.
  2. No storage tanks needed.
  3. Relatively easy to install.
  4. One of the lowest cost boilers
  5. Wide range of suppliers & models to meet your needs.

The popularity of this design means that there is a lot of choice in the market. If you are considering a new or replacement boiler, then it’s a good idea to get several quotes for different models & suppliers before making a decision.

Shopping around is the best way to find a combi boiler that meets both your budget & your hot water demand.

What are Combi Boiler Sizes and Prices 2022?

Combi Boiler Sizes and Prices are going to differ, for the reasons we covered above. However, one quite critical item is to consider the right size & power (usually measured by kilowatt output kW) for your particular needs.

If you buy an overpowered boiler, you’ll just be spending more than you need on energy bills.

Conversely, and probably worse for your quality of life, getting one that is under-powered will cause all sorts of frustrations. With running out of enough hot water to use at bath time, or maybe your heating will not able to keep your home warm enough.

Whilst it won’t do away with the need for you to get a qualified HVAC engineer to do a proper survey, the following combi boilers price guide is aimed at giving you a better idea of where to start (HVAC = Heating, Ventilation, and Air Conditioning).

Reviewing comparison tables and getting a better understanding of the likely performance of each model should give you more confidence about making the right choice.

Don’t forget you will need to allow for installation costs also. Which can make even the cheapest fully installed boiler cost from £1,000 or more.

What are combi boilers prices for a 1 or 2 bed property?

(power output of 24kw to 27kw)

Get Quotes Here

What are combi boilers prices for a 3 or 4 bed property?

(power output of 28kw to 33kw)

Get Quotes Here

What are combi boilers prices for a larger 4-bedroom property?

(power output of 35kw to 42kw)

Get Quotes Here

Top Rated Combi Boilers By Brand

Given that a new or replacement combi boiler is not cheap, it is only prudent to find out what other people think about, or have experienced, with each product.

One of the best ways to judge, is to look at reviews from customers. The more independent that review the better.

The most well-known UK consumer association is surely Which? This is the brand name used by the Consumers’ Association (that also happens to be a registered charity).

They carry out consumer research & tests on virtually everything. uses a combination of quality, reliability, professional recommendation and owner satisfaction to come up with an overall rating percentage.

Boiler Ratings By Independent Reviews survey December 2018

They also are well known for reviewing products and awarding a “BEST BUY” in the category of product.  The following manufacturers have all been awarded Best Buy for 1 or more of their combi boilers.

  • Worcester Bosch: Greenstar
  • Viessmann: Vitodens
  • Vaillant: ecoTEC

5 good reasons to buy a Combi boiler for your home

Let’s be straight to the point. Even though they are a great design, Combi boilers are not going to work well in every situation. Some family homes will benefit more from a different type, maybe a system boiler for example.

In properties where there are high simultaneous hot water demands, then combination boilers will always struggle.

Having said that, there are many times when the combi is the better choice, and they do have some attractive benefits.

Here are 5 of them.

1.      Super Energy Efficient

Firstly, they only heat the water that you need and only when you need it – no waste or reheating. This is saving on your bills.

2.      Hot water on demand instantly

As soon as you turn on the tap, you get hot water. No running the tap for ages to wait for the hot water to reach you from the storage tank. Less wasted water, more environmentally friendly, lower water bills.

3.      Designed to fit in small spaces

Combi’s are known to be a very compact design. As such, they take up far less space than other systems. It’s quite common to fit them inside a regular sized kitchen cabinet. Great if you are short of space.

4.      Does not require hot or cold water storage tanks

Combi boilers are fed direct from the mains water supply and heat the water as is flows thru the unit. This does away need for any type of water storage. Not only is this using less space in your home, but it also means less parts & labour to worry about.

5.      Relatively Easy to install

Once again, the very fact that there are no tanks or cylinders required means there is less parts & labour involved. This, by definition, makes combi boilers easier to install than other heating systems. Labour costs make up a significant proportion of the total expenses. Anything that reduces the labour needed is going to be reflected in reducing the “degree of difficulty” of the overall job.

gas safe logo for installersIn any case, you’re going to want to get a professional around to assess the job. The engineer will also work out quotations for the cost of supplying & fitting your new boiler system. Take the time to discuss your requirements with the engineer. He or she will use their expertise to guide you.

Something to bear in mind, if you are going for gas, then the unit must be installed by a registered person. For Oil fired combi’s it’s OFTEC certification / registration you should be looking for. For Gas it’s “Gas Safe” registration.

If you replace your boiler, then your local authority needs to be informed. Gas Safe or OFTEC registered installers will do this for you and issue a ‘building regulations compliance’ certificate.

You must keep this certificate safe. If you ever sell up & move home, you will need to produce it to the new owner.

How much does it cost to install combi boilers in 2022?

So, not only is it going to “put a dent your wallet” for the actual boiler, you also need to account for the cost of installing the system.

Labour costs alone can mount up. The more labour and the more parts you need the more you will need to spend. Fortunately, for combi boilers, parts & labour requirements are at the lowest end of all types of home heating systems. Thereby keeping the potential costs down.

The simplest job is a straight forward replacement. Putting a new unit in the exact same place as the old unit is the least costly. Changing to a combi from another type of system or relocation of your boiler is more complex and, for sure, will be more expensive to do.

Here is a rough guide to installation costs for combi boilers in a few different scenarios

.SITUATION                                                                                                   POTENTIAL COST GUIDE

Replace existing combi with new unit. Same location                                    £600 – £700

Replace existing combi with new unit. Different location                              £1,500 – £2,000

Replace system boiler & tanks with new combi boiler.                                   £2,000 – £2,800

Replace conventional boiler, tanks & cylinders with new combi.                 £2,800 – £3,000

The quality of the installation is just as, if not sometimes more, important than the type of boiler itself. Gas, oil & electricity are great servants, but really dangerous masters.

Always use a professional, because badly fitted heating systems have been known to cause serious injury, and in extreme cases, even death.

Suspect Carbon Monoxide – contact  or Call 0800 111 999

Compare Quotes Here