A Combi boiler provides both hot water and central heating in a single smaller system. No hot water cylinder or cold water tank would be required since it warms water when required. That is why it is a space-saving option for UK households. This guide will take you through Pros and Cons of Combi Boilers in detail.
Pros of Combi Boilers
- Space Saving
Combi boilers are small, and they occupy a cupboard in the kitchen or utility cupboard. In a flat or an undersized house, you will be pleased with the amount of space you will save. In case you need the information with very small systems, refer to our Small Combi Boilers Guide.Â
- Fast Hot Water
You can get hot water immediately when you turn on the tap, you do not have to wait till a tank is heated up. This is effective when you have 1-2 bathrooms and you do not tend to have multiple showers going at the same time.
- Lower Installation Costs
Since a combi boiler does not require tanks or cylinders, then installation is normally easy and less costly compared to other systems. That can lower the initial new combi boiler cost.
- Good Efficiency
Modern combi boilers are very efficient. In case you would like to select a highly efficient model, the guide to the most efficient combi boiler in the UK provides the best options.
- Easy to Maintain
With fewer parts and no tank, there are fewer things that can go wrong. Regular servicing keeps it running well and safe.
Cons of Combi Boilers
- Limited Hot Water Flow
In case you have a bigger family and you have more than one bathroom, you may observe a reduction in the flow of hot water when running two showers at the same time. There are better and worse combi boilers depending on the type of house, in a 3-bed house, there are better options compared to others, check in the Best Combi Boiler 3-Bed House UK guide.
- Not Ideal for Large Homes
A system or regular boiler with a hot water cylinder might be a better fit to you in case there is a high requirement of hot water in your home. We compared alternatives in our Combi Vs System Boiler.
- Dependence on Water Pressure
Combi boilers use the pressure in mains water. In case your pressure is minimal, you may have weak showering or slow-filling baths.
- Replacement Costs can Vary
If your property needs pipe changes or upgrades to meet building regs, combi boiler replacement costs can rise. Always get a quote to avoid surprises.
How much does a Combi Boiler Cost?
New combi boiler cost depends on the model, size and installation. The approximate UK prices (including installation):
- Basic economy model: £700–£1,200
- Mid-range model: £1,200–£2,000
- High-end model: £2,000–£3,500
Pro-Tip: When you select a larger capacity such as 30kW when having larger houses then prices could be increased; read our blog on Best 30kW Combi Boiler to find out more about size.
Is an Electric Combi Boiler a Useful Alternative?
An electric combi boiler works the same way as a gas combi but uses electricity to heat the water. It is typical in houses that lack gas supply.
Pros Of Electric Combi Boilers
- Installation is so simple, there is no need for a gas pipe.
- Reduced initial cost of installation.
- Zero on-site carbon emissions (however, electricity can be mixed).
Cons Of Electric Combi Boilers
- Depending on the electricity prices, running costs may be high as compared to gas.
- Fewer potent models for large hot water demand.
Are electric combi boilers right for you? They are suitable in rural areas or gas-free flats. Consider the running costs and whether you would like to transfer to a green tariff of energy in order to reduce bills.
How to Change a Combi Boiler
If you plan a combi boiler replacement, here are simple steps:
1.Get an Eligibility Check: Find out whether you can receive help or grants in order to be replaced.Â
Tap to Check Your Grant Eligibility
2. Select the Appropriate Size: Select the size of the boiler to suit your needs for the hot water.
3. Compare Quotes: Obtain at least three quotes of installers.Â
4. Book Installation: This installation normally takes a day or two.
5. Register and Service: Make sure the installer registers your new combi boiler and book annual servicing.
Important: In case you are over 60 years old and believe that you can receive free assistance, read How To Get Free Boiler Over 60 to find out more about possible support schemes.
The Way Eco Boiler Grants Can Assist You
Eco Boiler Grants focuses on assisting domestic property owners with the grants and low-cost opportunities regarding new boilers. We can assist which grants are available to you, whether you qualify to receive a free boiler as well as helping you in getting a quote now with the installers that are approved. Check your eligibility at Eco Boiler Grants to start the process and see what support may be available for your combi boiler replacement.
Easy Guide To Selecting the Right Combi Boiler
- Count your bathrooms and how many hot taps might run at once.
- Choose the right kW rating as larger homes often need more power.
- Look for efficiency ratings (A-rated boilers save fuel).
- Check warranty length (longer warranties give peace of mind)
- Ask about aftercare and annual servicing.
Frequently Asked Questions
Most of the modern combi boilers normally last between 10 and 15 years with regular services and precision.
Because of condensed fuel costs in very old models, a new and efficient combi boiler will reduce fuel bills, although there will be fuel economy differences.
