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Combi boiler

Replacement gas boiler

Boilers account for 60% of our home’s energy bills, so it’s important to ensure your system is working efficiently and won’t encounter any problems down the line.

Gas boilers can breakdown or fault at any time, leaving you without heat or hot water until the problem can be fixed. And unfortunately there is never any warning of when an old boiler will breakdown.

Boilers over 10-years-old are more prone to problems and repair bills can exceed £300. Given you could be saving money every year on energy bills and limit the risk of a breakdown, a replacement gas boiler could be your answer.

Benefits of a gas boiler replacement

Gas boilers are at the heart of your home, providing you with heat and hot water all year round. This makes a breakdown even harder for the general dynamics of your property.

With a replacement boiler:

  • Reduce your heating bills by as much as £300 a year. Inefficient boilers could be working at just 70%, meaning you’re paying out a lot more annually than you should be. Efficient condensing boilers burn fuel more efficiently, producing a greater amount of heat.

  • Cut your home’s carbon footprint by up to 1,220kg a year, helping the environment with global warming problems and aiding the Government in meeting EU targets.

  • Heat your home more efficiently and ensure heat is distributed evenly. When a new boiler is installed you’ll often receive other services such as a power flush to remove sludge build-up.

Combi boilers

Combi boilers or combination boilers are the UK’s most popular replacement gas boiler installation, with over 50% of new systems being a combi.

Combi gas boilers are highly efficient condensing boilers, converting more fuel into usable heat. This is made possible with a larger flue, which captures more of the hot gases and prevents them from escaping.

Combi boilers are also popular because they provide homeowners with hot water on demand, scrapping the need for water tanks in the loft or airing cupboard. This also means you’ll save plenty of room in your home.

Gas boiler quotes

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Average Combi boiler cost

The common cost of replacing your gas boiler is £2,536. Costs vary based on the type and brand of boiler you choose as well as the contractor you decide to go with. For example, a small local business may be able to offer a better price than a large national company as they will have fewer overheads. It' best to get a range of quotes from different boiler engineers so you can compare prices, reviews and references before going ahead.

Average price per Combi boiler job in 2022

Avg. price low

Avg. price low
£1,443

Avg. price

Avg. price
£2,536

Avg. price high

Avg. price high
£3,605

£3800

£2850

£1900

£950

£0

Prices based on actual Combi boiler costs for your area, as reported by local Quotatis members.

Combi boiler installation cost in your area 2022

Labour cost £1,750
Material cost £625
Waste removal £125
Time frame: 1-2 days

Advantages for Combi boiler

  • Lower gas bills each month with the more efficient modern combi-boilers
  • When we replace a boiler, the controls usually need an upgrade, too - Modern controls allow you to adjust the heating from your smart phone
  • Option to heat water and central heating seperately. Allowing you to just have hot water in the summer
  • No more waiting for the cylinder to heat up: there’ll always be hot water whenever you need it
  • Modern boilers are often smaller than older types. Give you extra space

Disadvantages for Combi boiler

  • Annual boiler services are highly recommend and essential if installed in a rental property
  • Carbon monoxide is produced during operation, faulty boilers could leak this into the property
  • If you don't have gas already then there will be an additional cost to connect gas to your home

Combi boiler Manufacturers

Combi boiler FAQs

How much is a british gas boiler?

If you’re looking for a reliable or reputable source for your new gas boiler, you definitely won’t find much better than British Gas. Using a big firm like British Gas comes with a plethora of benefits , but of course there are also some drawbacks, with the boiler prices being the main one and biggest turn off for most homeowners. However, just before we delve straight in to the price, let’s look at a thing or two about the big company.

The company, “British Gas are not a boiler manufacturer as you probably would have first imagined. They’re actually a company that specializes in the installation of boilers. As a result, they’re able to install just about any type of boiler you can imagine from any manufacturer. Be it a Worcester Bosch Greenstar 8000 Style or a Baxi 600, they’re able to provide you with the cost of having these boilers installed in your home or property.

Combi boilers are perfect boilers for space-saving and this makes them very popular on the market. They’re also very efficient when it comes to heating water instantly and warm your in few minutes. The price of a new British Gas combi boiler varies on a number of factors. Generally, the installation prices of combi boilers start from £1,800. Therefore, if British Gas are to be competitive with their pricing it should also be around this price.

However, if you have a large house with several rooms with a higher demand for hot water, British Gas will most likely recommend boilers such as Worcester Bosch 440CDi and the likes. Judging from other firms in the market, the price to have these types installed should be in excess of £3,000.

What size boiler do I need?

The size of boiler you need will depend on the size of your home, how many radiators and bathrooms you have and how many people live there. The boiler size refers to its output, which is measured in kilowatts (kW), rather than the actual dimensions. Speak to your boiler engineer about which boiler is suitable for you, as if you have more than one bathroom or a lot of people in your home a combi boiler might not suit you. Other boiler types such as system boilers or conventional boilers may be better suited to larger homes because they have bigger outputs.

Do I need a new boiler?

Ad hoc visits from your engineer to fix small issues with your heating system may actually seem cheaper and a lot more affordable, however when a boiler is ripe enough for a change these small issues are always never ending. Over some period of time, these small issues will inevitably get worse and the idea of “mend and make do will be an absolutely false economy. The best course of action in this sort of event is to find a replacement boiler to install as soon as possible. In this article, we’re going to give you some hints that’ll show you when your boiler needs to be replaced. Now let’s take a look!

✓ Insufficient hot water. Here, you’ll have to check the size of your hot water cylinder. It’s crucial to make sure that your boiler is rightly sized to power your heating as well as hot water circuit in line with your demands. You should always seek the advice of a heating expert who can recommend whether to fix or replace the boiler.

✓ Strange noises. It’s normal for components of the boiler to become worn or damaged over time. Replacing the particular component that’s causing the knocking or rattling may seem cost effective at first but more often than not, the noises usually signal a bigger issue which is likely to build up over time. Hence, it’ll be a lot more logical to replace the boiler itself.

✓ Regular repair of your boiler. It’s essential to have your heating system serviced by a Gas Safe engineer on an annual basis. However, when you have to call them more often than once a year for your yearly maintenance, it may be a wise decision to consider getting a replacement.

✓ Other events whereby you may need a new boiler includes when you can’t get the right temperature in your room, when the radiators don’t heat up as they should, when your boiler leaks and if your boiler still has a pilot light.

How much is a new gas boiler?

If you’re thinking about getting a new gas boiler for your home or property, then you might also be wondering how much it’ll cost you so you can set a budget and start planning. As simple as this question sounds, it’s actually very tricky to provide a simple and short answer as the costs of installing a new gas boiler alone varies greatly based on the parts needed, the amount of work required, your location, their availability as well as the company you hire for the project.

When it comes to purchasing a new gas boiler the price you’re expected to pay also depends on multiple influencing factors such as the type, brand as well as your most preferred gas boiler model. However, one thing you should have in mind is the fact that your gas boiler is right at the heart of your home or property and can be a complicated piece of machinery. As a result, you wouldn’t expect gas boilers to come cheap. Generally, it’s going to cost within the range of £500 to about £2,500 to get a new gas boiler. Therefore, it’s always advisable to obtain all necessary details and facts before you decide to purchase a replacement gas boiler.

This price range may seem too high as it’s usually a turn off for most homeowners. However, it’s worth noting that gas boiler replacement costs and gas boiler installation costs are, more often than not, compensated by the saving you’ll make off your utility bills - all thanks to the new and more energy efficient boiler you just installed in your home. And even more importantly, when it has been estimated that roughly half of the amount spent on energy on an annual basis depends on your boiler.

What is a condensing boiler?

Condensing boilers are the in-thing when it comes to modern heating systems in UK homes and across the globe for a good reason. This is primarily due to the fact that condensing boilers happens to be highly efficient as it enables the fuel you’re burning to heat up your home go a lot further. Having a new high efficiency condensing boiler rather than an old G-rated non condensing boiler will not only enhance your heating controls, but also save you a lot of money annually. In this article, we’re going to take you through the basics of a condensing boiler. Let’s take a closer look!

If you’re interested in getting a greener and more efficient boiler, you simply can’t afford to look beyond a high efficiency condensing boiler. This is purely due to the fact that these condensing boilers happens to make a better use of the heat they’re able to produce from burning fuels like oil or gas ( in other words, they require less heat from the burner, which makes them a lot more efficient).

So how does a condensing boiler work? Unlike a non-condensing heat-nly boiler, some heat will be wasted in form of hot gases which are released from the flue. Meanwhile a condensing boiler captures some of the heat from these gases and puts them to use for heating up water that’s coming back from your central heating system. As a result, it requires just a minimal heat from the burner which make the boiler more efficient.

You should take note that all new modern boilers are condensing boilers. Therefore if you’re planning to replace an old boiler with a new one, you’ll definitely be buying a new condensing boiler and benefit from all the efficiency and savings that comes with it.

How long does a boiler last?

If you get the right size boiler for your home and you get it serviced regularly, your boiler could last up to 15 years. It may even last longer than this, but you’ll find that your boiler begins to become less efficient as it gets older. Also, as technology improves, a boiler older than 15 years may not be the most efficient one on the market.

How do I re-pressurise a boiler?

Re-pressurising your boiler means that you allow more water to enter system via the filling loop. It can be easy to re-pressurise your boiler yourself. Always check your manual, but there are some simple steps you can take to restore pressure to your boiler:

• Switch off your boiler and let it cool completely

• Make sure both ends of your filling loop are attached

• Open both valves to allow cold water into the system – you’ll hear it start to move

• Look out for your pressure gauge to show 1.5 bar

• Close both valves

• Switch your boiler back on

• Undo both ends of your filling loop and remove it. Remember some water might come out, so be ready to catch some spillage!

How long does it take to replace a gas boiler?

In the UK, more than 50 percent of the money paid for utility bills is aimed at heating and hot water costs as stated by the Energy Saving Trust. This also means that when you settle for an old or ageing boiler, you’ll have to unnecessarily incur high utility bill in order to heat your home and have hot water on demand. In this kind of situation, the most effective and practical solution is to fit a new gas boiler in your home. This will provide you several benefits such as improved efficiency and reliability as well as reduced operating costs.

However, the only drawback here is the fact that removing your old gas boiler and replacing it with a new gas boiler isn’t a 5 minute task. And as you would have expected, like many other home improvement project there’s always an element of disruption that you’ll have to put into consideration when fitting a new gas boiler system. Good news is, with a qualified and experienced heating companies, these disruptions can be kept at a minimum. So now let’s take a look at how long it’ll take to replace a gas boiler depending on the type.

✓ An existing combi boiler upgrade - Installation times may vary, but typically the removal of an existing combi boiler and installation of a new one will usually be completed in a day - about four to six hours.

✓ Converting a regular to a combi boiler - Due to the fact that these type of project is usually labour intensive, it’ll take longer to complete - about 2 days.

✓ First time installation of new boiler to a home. This will usually take about 3 or more days because new pipes and other tasks need to the installation will be carried out.

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