In the ultimate guide to Combi Boilers and Installation, you will learn everything there is to know about Combi Boilers. From how they work, to the different price points and who’s best to advise and install your new boiler when the time comes.
There are lots of benefits to getting a new boiler. By replacing your old one for a new A rated efficiency boiler, you could make savings of up to £300 a year. Furthermore, if your boiler is over 10 years old, it’s probably a good time to start looking for a replacement anyway. Perhaps your home is not heating up as well as it should be. Or replacement parts for your boiler are getting harder to find.
There are different types of boilers available and your choice largely depends on the size of your home and your household. In the ultimate guide to Combi Boilers and Installation, we’ll look at Combi boilers in particular.
With a gas Combi Boiler, the word ‘Combi’ is short for ‘combination’. Essentially, it’s called a combination boiler because a single unit serves two functions. Combi boilers control your heating and hot water. Therefore, it’s a very popular choice because you don’t need a separate water cylinder or tank.
Hence, you can fit a Combi Boiler into a smaller space, even a kitchen cupboard for example.
You can read our Guide to Getting a New Boiler here.
Basically, Combi boilers heat water directly from the mains supply when you turn on a tap. So, you don’t need that water storage cylinder in the loft. The hot water is delivered at mains level power. There are many benefits to installing a Combi Boiler.
It heats up water on demand because you don’t have to wait for a water tank to heat up. Hence, there is an unlimited supply of water. Additionally, they are more efficient than other types of boilers and cheaper to install.
However, a Combi Boiler is not ideal for lots of showers at the same time. Nor to turn on the hot tap while showering. This might cause an issue if you live in a large household with a number of bathrooms and en suites. To ensure that the Combi Boiler is working properly, you will need good mains pressure.
If you’re considering having a new boiler, it’s wise to check what the mains pressure is like in your area.
You don’t want to waste energy or money for that matter on getting a boiler that is small, but doesn’t serve the purpose of your household. Or a boiler that is too big for your needs
Boiler outputs are measured in Kilowatts, or kW. An underpowered boiler will struggle to meet the heating demands of your home. Whereas an overpowered boiler won’t provide you with any additional benefits. Therefore you’ll be spending more money on a boiler model that you don’t particularly need.
Generally speaking, an average three or four bedroom house typically has around ten radiators and will usually require a small or medium Combi Boiler. For example, 24-30kW boiler. A larger house with substantially more radiators or an en-suite bathroom will need one that is larger, typically 30-35 kW.
However, it could be worth considering a higher power boiler than necessary if you are planning a home extension that includes additional showers or baths.
Furthermore, if your home has 3 or more bath and shower outlets which could potentially be used at the same time, you may wish to consider a different boiler.
When you are looking for a Combi Boiler, you may wish to consider the following;
There are several brands to choose from including Worcester Bosch, Vaillant, Ideal and Viessman to name a few. Regarding efficiency, this may be one of the main reasons you are considering a new boiler. Does it have an A rated efficiency? Will the output be enough for your household requirements? What do other people think? Generally speaking, customer reviews may help to make up your mind.
Additionally, you can always speak to a gas safe registered engineer. If you are booking an annual maintenance check up on your current boiler, you could always ask the engineer what they would recommend for your home.
This wouldn’t be the ultimate guide to Combi Boilers and Installation if we didn’t get down to talking about the cheaper side of the market. Combi boilers range in price from output to brand. The average cost of a new Combi Boiler varies between £1,500 and £3,000 depending on the brand and type.
There are other factors to consider as well. Such as whether or not it is a direct swap. For example, are you replacing your old Combi Boiler for a new Combi Boiler in the same place? That will be an easy installation requiring less labour time. Therefore it’s a cheaper option.
Or, do you want to move your boiler elsewhere? Are you replacing an old conventional boiler with a new Combi Boiler? Hence, you need to get rid of the infrastructure that goes with the old boiler. Leading to more time in the installation and labour costs, pushing the price higher.
Furthermore, do you require extras, such as smart controls and filters? These can help save you energy and money on your bills in the long run. However, there may be an additional cost at installation.
Notably, different gas companies offer varying prices based on boiler location, availability and your location. It’s worth shopping around here. For example, you could look into independent boiler companies, local to you, who may be able to do installs for a cheaper price.
Once again, generally speaking, a new Combi Boiler on its own can cost between £600-£900 for a budget model. Then, it’s between £900-£1,200 for a mid range model. Reaching up to £1,000-£2,000 for a premium model. Also, you need to factor in the size of the boiler.
If the installation is a straight forward job, overall, it should be cheaper than a complex installation.
For example, if you want a boiler conversion, this may include the removal of your old boiler and water cylinder. Along with installing newly upgraded pipework to the incoming boiler and the new boiler itself. It’s a big job which could add between £800-£1,200 to your boiler installation price when compared with a like for like swap.
Still reading? Bravo. Let’s continue with the ultimate guide to Combi Boilers and Installation!
A combi boiler is a very efficient. Most new gas condensing Combi boilers will come an efficiency rating of up to 98%. Generally speaking, the efficiency of a combi boiler is higher on average than a conventional system. However, the efficiency will decrease over time with the age of the boiler. Thus, if your boiler is over 10 years old, even if you have a combi boiler, it will be less efficient than a new one.
There are many ways you can use your combi boiler more efficiently to reduce your energy usage and bills. One of the easiest ways to reduce your energy use at home is to set your thermostat to a lower temperature. Even reducing it by one degree could result in saving you £80 per year on bills.
Boiler pressure is about the balance of water and air running inside your heating system. You measure it by the pressure gauge in the panel which might be analogue or digital. For a boiler to work efficiently, the pressure needs to be at an ideal level. Low pressure could cause it to shut down, whilst high pressure can cause the system to overwork.
A combi boiler will heat the water only when it’s needed, therefore helping to minimise wastage. The pressure increases when the heating is on because your boiler uses fuel, either gas or oil, to heat the water. Hence, the increase in pressure is natural. If your boiler is working correctly, the pressure will stabilise again once the system has cooled down.
As a general rule, the ideal pressure levels for combi boilers are as follows. When the heating is turned off, the pressure gauge should read between 1 and 1.5 bars. When the heating is switched on, the pressure should ideally be around 2 bars.
For some models, the pressure gauge will display pressure levels using a dial. You will see a pointer or arrow in the red zone or green zone. Usually, newer models have a digital display like a watch which also shows temperature information and pre-set timers.
There are a few factors which may cause the pressure to change. As already mentioned, when your hot water is on, the pressure will rise because the fuel is heating the water. This is not something to worry about.
However, a warning sign to look out for is if the boiler pressure rises above the levels of 2 bars when the heating is on. Or 1.5 bars when the heating is off. This could be a sign of an underlying issue. Have a look at your manufacturer’s guide which may help you to fix the problem at home. Or, you may have to call out a registered gas safety engineer.
If you are having low pressure problems with your combi boiler at home, you may need to top up the water level. However, if the gauge is showing high pressure, this may be because your boiler has been overfilled. The solution is to drain some water from the system.
One way to do this is to bleed the radiators. The first step is to switch off your boiler and use the radiator key to turn the valve. You should hear air escaping before you see a small amount of water being released. This shouldn’t be a large amount. It’s a good idea to keep something underneath the valve for any drips.
If you have any concerns about changes in pressure, you have checked the boiler manual and are still not sure, then contact a gas safety engineer for further help.
Even if you have a brand new combi boiler and it’s in full working order, you should still get an annual maintenance check. There are several benefits to this. Firstly, if you are renting a property and you have tenants, it is a legal requirement. The boiler and any other installations are your responsibility.
Secondly, an annual check may be part of the boiler warranty. So, as a homeowner, if you do not book in a maintenance check, this could affect your warranty or insurance if something goes wrong.
Thirdly, an annual check will pick up any small problems before they become larger ones. Perhaps there is some dust that has got inside your boiler and it just needs an internal clean. Or maybe a part needs adjusting or fixing properly. The annual check will identify any issues and you can continue to enjoy a warm and comfortable home.
There are many brands and models of Combi Boiler to choose from. Also, in a wide range of prices. Combi boilers are given a grade based on how energy efficient they are, with an A rating being the highest. This is helpful because it can determine how expensive a boiler is to run. As this is the ultimate guide to Combi Boilers and Installation, we must dig deeper into efficiency…
Although an A rating boiler may be a more expensive outlay at the beginning, it can save you money over time. It’s worth considering this when you come to making a purchase.
You will also need to consider the size of your boiler. This is something your gas engineer can help you with. So the power outage of your boiler is a factor in efficiency. You don’t want a combi boiler that is too big in outage for your needs.
This will lead to energy wastage and inefficiency. However, you also want the right size so the boiler is not overworking to meet your energy needs. Again, this will lead to inefficiency problems.
Furthermore, you can make your combi boiler more energy efficient with a range of additional extras. Such as smart control heating. There are boiler branded smart controls that speak to that specific brand of boiler. For example, you can buy a Worcester Bosch smart control that works with the Worcester Bosch brand.
You can then control your heating via your phone or other device when you are not at home.
There are many factors that determine how much a combi boiler costs. Mainly, this is due to the amount of brands and models available. For a budget combi boiler model, you are looking at between £600-£900 for the unit on its own.
A middle range combi boiler costs around £900-£1,200. A premium model can reach up to £1,000-£2,000. This is before installation and labour costs.
When it comes to choosing a combi boiler, it’s worth bearing in mind that your boiler is responsible for about 60% of your energy bills. So, you’ll also want it to be as energy efficient as possible.
With a new, energy efficient boiler, you could make savings of up to £300 a year on your gas bill. Hence, it’s worth shopping around to find an ideal one for your home.
A combi boiler, or combination boiler, serves two functions in one single unit. It can heat your home and your water. Therefore, there is no need for a hot water tank or a storage cylinder. So, it heats your water on demand from the mains supply.
Conventional boilers, also known as regular boilers, are the oldest type of boiler. As well as the boiler, a conventional heating system includes a tank in the loft and a hot water cylinder. The tank is full of cold water, which is delivered down to the boiler as and when it needs to be heated. Then the cylinder is where the domestic hot water is heated and stored until a hot water tap is turned on. Therefore, you will need more space for a conventional boiler.
However, a system boiler is between both. It provides your home with heating and hot water from the unit itself, like a combi boiler. But, rather than supplying instant hot water, system boilers store it in a cylinder, ready to go to the taps when you need it.
If the ultimate guide to Combi Boilers and Installation hasn’t answered your question on the differences between boilers yet, read on, or you may find our other guide interesting: Should I Get A Combi Boiler?
As you can see above, combi boilers require the least space and infrastructure, therefore they are cheaper to install.
The cost of installing your combi boiler depends on several factors. The average installation cost of a new boiler ranges from £500 – £1,500. However, these costs can change significantly based on the type of boiler you choose. For example, if you are replacing your old conventional boiler for a new combi boiler, this will take up more about time, as there is a tank, cylinder and pipes to remove.
But if you are simply replacing an old combi boiler for a new one in the same place, this will be a quicker and simpler installation.
Furthermore, if you choose your boiler and installation from a national company, they may charge more than a local, independent engineer. With this in mind, it’s good to get a few quotes from different places to compare prices and decide who you want to spend money with.
Firstly, it’s essential that you use an engineer on the gas safety register. This is a legal requirement. Anyone who carries out work with gas supplies and installations must be on the register. If not, the work is illegal and potentially unsafe.
If you book your engineer via a website, it should display that all engineers are on the gas safety register. You can check further as each engineer will have a specific number which relates to the register, and you can look up this number on the gas safety website.
Additionally, when the engineer arrives at your home, they will be wearing an ID with a photo. You can check their ID which will also have their gas safety register number on it and a list of the work they are legally able to carry out.
We’ve covered quite a lot of ground so far in the ultimate guide to Combi Boilers and Installation. So let’s discuss who installs your combi boiler.
You don’t have to stick with the company that supplies your gas or other fuel to install your boiler. It may be cheaper to get your boiler installed with an engineer recommendation from the manufacturer or brand. However, this is not always the case.
By shopping around and collecting a few quotes, you may find a cheaper option.
At Get Me A Boiler, there is a simple, free online quote tool. All you have to do is fill it in and the trusted plumbers registered on the site will contact you. Then, you get to choose which one you think is the best quote and proceed from there.
The tool is completely free to use and there’s no obligation to choose one of the plumbers. Moreover, all boilers types are covered and the website only uses gas safe registered companies. Hence you can have peace of mind that the plumbers who contact you are safe and experienced.
Then, the final decision about who installs your boiler and for what price is in your hands.
By replacing your old boiler with a more energy efficient one, you are helping to reduce global carbon emissions. Additionally, it’s not just the environment you are helping, you will also notice a reduction in your energy bills.
Furthermore, the older your boiler gets, the less dependable it is. Boilers are more likely to break down when they are most in use. Hence, winter is the time when many boilers are in constant use and likely to have problems. You don’t want to be left in a cold house with no hot water. Therefore a new boiler is more reliable, giving you peace of mind throughout the year.
Additionally, new boilers can link up with smart technology to save even more energy and money. You can even control your heating from your phone or tablet with Smart technology when you are out of the home. At the touch of a button, you can return to a nice warm home whenever you want.
When you’re looking for a boiler, you will notice how many types and brands there are. How do you begin to choose the right one? There are many options for combi boilers, from cheaper, straight forward units, to more expensive models with additional features and technology. Read on to learn more about the different models you can choose from.
Generally speaking, there are several factors to look out for when choosing your combi boiler, not just its price. You should consider the size of the boiler and its output. A lower output will operate more efficiently all year round. However, you want the right level of output for the needs of your household.
For example, if there are two of you at home using one bathroom, you will probably need a lesser output than a larger home with multiple bathrooms.
Additionally, you may want to consider the warranty length and its efficiency rating. There are some reasonably priced combi boilers with better efficiency potential than more expensive models. Furthermore, some manufacturers offer the same boiler with different warranty periods, ranging from 2-7 years.
You will need to decide what is the best option for you. Usually, a longer warranty is more expensive, but may be part of a better overall package.
With this in mind, here are some of the top brands for combi boilers. After all, this is The Ultimate Guide to Combi Boilers and Installation!
There are other boiler brands than the 5 mentioned above. However, if you choose a boiler from one of these brands, you can rest assured that they have an excellent record with homeowners and engineers. Also, within each brand, there are several options for different models of combi boiler. Here are three examples of combi boilers for different brands.
The Worcester Bosch Greenstar 25i is Worcester’s cheapest and most popular combi boiler. It comes with an A rating efficiency of 93%. The output is 25kW and it comes with a standard warranty of up to 10 years. A typical price is around £975 and installation is between £500-£1,000. The Greenstar I range is their entry level of combi boiler, or budget version.
The Viessmann Vitodens O50-W is a combi boiler with a standard efficiency of up to 97% and an A rating. The output reaches 29kW and its compact design makes it one of the smaller combi boilers in the Viessmann range. It costs from £796 before installation.
A Baxi 200 Combi Boiler is compact and easy to install. It comes with a standard 3 year warranty and an output of 28kW. The price is £618 before installation.
Ultimately, you can go for the cheapest gas combi boiler you can find, but this isn’t necessarily the right one for your home. With this in mind, you may want to consider the length of the warranty, the energy output and the efficiency as well as the price.
Notably, top brands like Worcester Bosch are generally more expensive, but come with longer warranties and excellent efficiency. However, most brands such as Vaillant and Viessmann have a wide range of boilers. From cheaper styles to more technical and expensive models.
Remember, if the ultimate guide to Combi Boilers and Installation hasn’t answered your questions, you can contact us for support or visit our Boiler News section.
An oil combi boiler system works in a similar way to a gas combi boiler. It uses an oil fired boiler to heat water, which supplies the central heating via radiators and hot water through taps. The main difference is that an oil fired boiler requires a constant oil supply, delivered and stored in a tank. The hot water is instant, as the system is connected to the water mains supply.
Oil is a more efficient fuel than gas and the running costs of oil fired combi boiler are lower than the types of boilers. An oil boiler from the Worcester Bosch brand starts from around £1,400. It’s a similar price from the Grant brand of oil boilers. Then, both brands range in price up to £2,200.
Overall, with its reputation and years of experience in the heating industry, you may consider that Worcester Bosch offers the best combi boiler. Along with this comes an excellent warranty length, up to 10 years or more depending on installation.
However, if you think about exactly what you need from your boiler in terms of your household requirements, you may find a similar model for a cheaper price.
Perhaps you are willing to cut down on the length of warranty. Or you would consider a similar boiler from a lesser known brand. Furthermore, you could make better savings in the long run depending on the energy efficiency and output of your boiler.
If you have a Worcester Bosch boiler in mind, there are some cheaper options. The Worcester Greenstar 2000 has a 25kW output boiler for ~£718. The Greenstar 2000 has a 5 year guarantee option and £100 installer cashback at the time of writing this, depending on who installs it.
Making a decision over which boiler to choose can be a minefield. However, you can always ask a gas safety engineer for advice.
There are many trusted plumbers who are listed with Get Me A Boiler. All you have to do is visit the Get Me A Boiler website and start by filling in a simple form.
You can choose what you are looking for from three options. Boiler replacement, a full heating system, or maintenance and servicing. Put in your details, including what type of home you live in and how urgently you need a new boiler, if that’s what you’re looking for.
Then, a range of local and trusted plumbers will get back to you with quotes. You can then compare the quotes and decide who you choose to fit your boiler. There is no obligation to choose a quote you receive.
Furthermore, it’s completely free to get your quotes and all the plumbers on the list are on the gas safety register. Therefore you have peace of mind knowing that your plumber can carry out the work legally and safely, and that they are qualified to do so.
Using Get Me A Boiler comes with many benefits. For example, you can get 10% off the price of your new boiler and installation. Also, two years free servicing. And a free state of the art Hive smart thermostat. Moreover, by getting a new boiler, you may be able to make savings of up to £300 a year on your energy bills.
As the price of installation can vary, its worth getting three quotes to compare from approved plumbers in your area. This is the best way to ensure you get competitive prices. You can save time by using Get Me A Boiler, as you only need to put in your details once and the plumbers will get back to you with a quote. Then you can compare and choose from the range you are given.
The cheapest quote isn’t always the best. Don’t forget to check what sort of warranty and guarantee the installer provides. This is true in terms of the boiler warranty and the work that the installer carries out. Some installers may favour certain well known brands, but this doesn’t mean you have to buy that model.
Furthermore, you could check if the installer is happy to stay and guide you through the operating process of the boiler afterwards. This should happen anyway, but perhaps it might make a difference to you if they mention it in a quote.
Some people require next day installation depending on their circumstances. This may affect the price of your installation. You may not always be able to choose the timing of your installation, especially if your current boiler breaks down.
But if you can, it’s a good idea to choose the summer months. That way, you are less reliant on your boiler. Also, if it is a complex job, you can leave the house or the area of the house where it is being installed.
All you have to do is clear the space from any furniture or clutter so that the engineer can access your boiler easily. After the installation, ask the engineer to talk you through how the boiler operates and don’t forget to fill in any paperwork. This is also a good time to book the first annual maintenance check, although you don’t have to use the same installer or company for that.
On average, a new boiler installation can take between 1-3 days. It depends on how complex or easy the job is. For example, you may just be swapping an old combi boiler for a new one in the same place. This is relatively simple and should not take longer than a few hours.
But, if you are replacing an old conventional boiler with its storage cylinder and cold tank for a new combi boiler, then this will take considerably longer. It is a more complex job and requires more time. Additionally, you should set some time for your survey appointment which will take place before your installation.
To sum up the ultimate guide to Combi Boilers and Installation, there are clearly many factors to consider when buying a new combi boiler. These include the needs of your household and the size of your home. As well as what efficiency savings you would like to make and the warranty of the boiler.
With such a variety of models on offer, it’s worth shopping around for the best choice and comparing quotes. That’s where Get Me A Boiler can help. It’s online quote tool is a simple form which allows local trusted plumbers to contact you with their quotes. Then you can compare them and choose the right one for you.
By replacing your old boiler for a new one, you could potentially make savings of up to £300 per year. If your boiler is over 10 years old, it’s worth considering what your next boiler will be.
Benefits of a combi boiler include its compact size. There’s no more giant water tank in the loft, or huge stand alone boiler in the corner. Most combi boilers can fit snugly into a kitchen cupboard. Nowadays, the technology and design even means they can suit your home aesthetically too.
Exchanging an old combi boiler for a new one in the same place is an easy and cheaper installation. Generally speaking, it shouldn’t take more than a few hours, leaving you with a nice and warm, energy efficient home. As well as peace of mind that you are contributing to saving energy.
By using Get Me A Boiler, you can receive a super fast, no obligation, free quotation for your new gas installation. So, as soon as you have decided that you need a new boiler, hop on the phone at 0800 292 6072 or visit GetMeABoiler.com
You’ll find all the advice you need.
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