Looking for new boiler prices in 2025? If you’ve already done some research, you’ve probably discovered that boiler prices can vary hugely. One expert sourced boiler estimates from ten different suppliers and brands and was quoted prices that varied by as much as £3,200!
Many factors can affect the price you pay, including the type of boiler, its size and output, and the company you choose for the installation.
At Double Glazing On The Web, we want to make finding boiler prices a little less complicated. This article aims to remove the mystery from new boiler installation costs and help you find the best boiler brands and prices for your home.
Due to this, finding out how to get the lowest costs for new boilers is becoming more and more vital. But many factors can affect the price you pay, from the type of boiler you choose, the size, the output, and the company and installers you fit it through. That’s why, at Double Glazing On The Web, we set out to make finding boiler prices a little less complicated.
What Is The Average Price For A New Boiler?
A new boiler could cost as little as £499 up to £2,950. The median price of a new boiler system for your home is £2,595, which reflects additional work that may be required for the installation. For example, you might need a full chemical power flush to clean out any dirt from your drainage or new radiator valves, filters, circulation pumps, and thermostats as part of the installation. Once you start adding on extras, new boiler costs can rise considerably depending on your old system, its current state, and what you’re upgrading to.
The good news is that you don’t necessarily have to go over budget to get a brand-new boiler for your home. The trick is to know the systems and brands on the market. Choosing local installers can also make a difference, as can searching out government grants that could even get you a new boiler for free!
Replacing a boiler will cost less than repairing your old one over time. Repairs are expensive, plus a new boiler will provide all the benefits of the latest technology so that you can heat your home in the most efficient and cost-effective way. Modern systems, such as system, combi, and oil boilers, are far more energy efficient than traditional designs.
Let’s look at average costs on different types of new boilers.
| Type of boiler | Price range |
| Gas combi | £499 to £825 |
| Gas system | £512 to £910 |
| Gas conventional | £492 to £3,600 |
| Oil Combi | £2,057 to £3,191 |
| Oil system | £1,335 to £2,407 |
| Oil conventional | £1,107 to £3,770 |
Why Are New Boilers More Energy Efficient And Money-Saving?
Your current boiler is most likely heat-only or conventional. Heat-only designs rely on existing heating systems and come with an independent hot water cylinder and cumbersome storage tank. Some of these older models are now obsolete. As your boiler ages, it becomes less energy-efficient, needing more energy to meet your minimum water and heating requirements. A modern boiler, in contrast, will save you money on the first day it’s installed. Let’s take a look at the latest boiler types on the market:
A system boiler is ideal if you have a larger home or a high hot water demand. System boilers have a lot of power and come with either a water cylinder or a tank, often located in other areas, such as your loft. They cost between £1,500 and £3,000, and while they provide a lot of heat, they’re usually too large for modern homes.
Combi boilers don’t have external tanks – the water storage and heating system are all in one place, so they take up much less space. Also, combi designs are more efficient and use less power, helping you save money on energy bills while keeping your home warm and comfortable.
Combi boilers are a brilliant replacement for an old back boiler. They’re also more affordable, making them perfect for smaller homes or apartments. As they take up less space, you’ll have more room at home and more money in your wallet!
Oil boiler systems are an alternative to gas and electric boilers. If your house doesn’t have a natural gas connection (and many rural properties don’t), then an oil boiler is an obvious choice. The oil is stored in a large tank outside the property.
Why Do Boiler Prices Vary So Much?
Boiler prices vary due to the many factors affecting their design and installation. The first, and perhaps the most crucial, is which company you choose. In the past, many homeowners decided to get boilers from British Gas or other national companies—you may even have an old British Gas system in your home now.
However, large companies have large overheads, so the bigger the installer, the higher the boiler price. Boilers from British Gas can cost up to 50% more on average than an equivalent from a local company—that’s a hefty price hike!
Another influential factor on cost is the power output of your boiler. Power in a boiler, measured in kW, impacts cost, especially if you have a larger home to heat. However, if you require ten radiators or fewer and only have one bathroom, you probably won’t need an extensive system with separate heating cylinders.
A smaller house can be heated perfectly adequately with a combi boiler that uses as little as 24kW. A combi boiler will save you money, help you use less energy, and you’ll be looking at a lower initial investment. A larger property will need a new boiler with a higher output, 34kW and more.
The Benefits Of A New Boiler
Modern Condensing Technology
All modern boilers are condensing boilers, meaning they can use more of the energy you put into them. With an old, conventional boiler, the system wastes some heat by releasing hot gases from the flue. That energy is lost, but you’re still paying for it!
The condensing technology on a new boiler captures these gases and redirects them back into the boiler, heating water that returns through your central heating system. All modern boiler types have condensing qualities, potentially saving you up to £310 a year.
Thermal Efficiency
Any boiler upgrade scheme focuses on thermal efficiency; the energy efficiency rating of your new boiler should be high on your list of requirements. You’ll save money on your energy bills and be more environmentally friendly. Because of a government commitment, every new boiler installation in the UK needs to achieve at least 92% ErP; this refers to the amount of energy the system can recover. From your point of view, you’ll waste far less heat, and it will cost a reduced amount to keep your home warm and cosy.
Long-lasting Performance
There’s nothing worse than a problem with your boiler – that means a cold house and hefty repair costs. A brand-new boiler will kick those concerns into the long grass! You can expect a new system to perform at its best for a minimum of ten years without problems, even longer if you service it regularly and stay on top of routine maintenance on the whole system, including radiators.
Now, let’s examine the different boiler types, their characteristics, and associated costs using handy tables that tell you everything you need to know.
Conventional Boilers
Conventional boilers, sometimes known as heat-only boilers, cost between £1,500 and £3,000 for a complete installation. These systems rely on hot and cold water storage tanks, which usually go in your home’s loft. The boiler unit plugs into your mains to ignite the fuel. A pump transports water from the tanks that you can use throughout the day.
Conventional boilers still have a place in older properties, as they can be installed immediately without changing any other parts of the heating system. However, the tanks will need a lot of space to fit in, and the cylinders require insulation to keep water warm, so there could be expensive additional installation costs.
Most conventional boiler systems are rapidly becoming inefficient by today’s standards.
Here are some average prices from leading boiler brands.
| Manufacturer | Product name | Type | Product number | Max. central heating output (kW) | Average price with installation* |
| Glow-worm | Flexicom 35hx | Conventional | 108054 | 35 | £1822 |
| Vaillant | EcoTEC Plus 438 | Conventional | 0010002725 | 38 | £2131 |
| Worcester Bosch | Greenstar FS 30CDi | Conventional | 7715430442 | 30 | £2170 |
| Baxi | Solo 30 HE A | Conventional | 5117785 | 30 | £1519 |
System Boilers
System boilers work like larger designs but take their water supply directly from the mains. The design is much more compact, and you won’t need to sacrifice room in your home for a storage tank. Prices start at £546 just for the new boiler, but you’ll also need to factor in installation costs on top of that.
Because system boilers use a storage cylinder, they take up less space and are cheaper from the outset. As they take water directly from the mains, the system benefits from higher water pressure, and you won’t have to wait as long for the water to heat up. However, hot water isn’t instant, so you can sometimes need to wait for around 30 minutes if the system has been off.
System boilers heat your home using much less power than a conventional boiler, saving you money on your energy bills. Some system boiler designs are even compatible with solar panels!
System boilers work well for medium-sized homes and have enough power to keep your whole family warm and comfortable, whatever the weather.
Here are some typical system boiler prices.
| Average Price | Standard warranty | Free extended warranty | Maximum heating output | Minimum heating output | ||
| Ravenheat CS system boiler | 24 | £546 | 2 | 2 | 26 | 4.0 |
| Glow Worm System | 12 | £690 | 7 | 7 | 12 | 4.5 |
| Vaillant ecoFIT pure system | 612 | £865 | 2 | 7 | 12 | 4.7 |
| Worcester Bosch Greenstar System i | 12 | £900 | 5 | 10 | 12 | 3.1 |
| Ideal Vogue System | 15 | £905 | 10 | 10 | 15 | 3.2 |
| Vaillant ecoTEC plus system | 612 | £910 | 5 | 10 | 12 | 3.3 |
| Worcester Bosch Greenstar 8000 30 | 30 | £1,310 | 5 | 10 | 30 | 3.0 |
| Viessmann 200-W System | 11 | £1,375 | 2 | 5 | 11 | 1.9 |
Combi Boilers
A combi design is a great way to get a high-performance boiler while keeping costs low. Combi boilers are compact, with prices and costs that feel just the same. The combi boiler is an all-in-one design with dual functionality, acting as a water heater and a central heating boiler. You’ll have everything you need in one, well-packaged system.
Combi boilers are ideal for smaller homes and apartments and work with lower power outputs. However, you can also buy combi boilers with power outputs up to 42kW and increased flow rates for slightly larger properties or homes with higher needs. You can cleverly conceal a combi boiler behind a door in your kitchen so it’s out of view, too. Prices start from as little as £499 for a stand-alone system and increase depending on model, capabilities and installation costs.
Oil Boilers
Oil boilers run on oil rather than gas; in some cases, they are even more efficient than gas boilers. They are available in a variety of designs to suit any home. Heat-only options exist for larger properties or compact combi oil boilers with condensing systems.
It costs £1300 on average to heat a three-bedroom home with an oil boiler. Also, new designs use a thinner 28sec oil, less heavy and harmful than the old 35sec oil used in older models. As a result, you’ll create less waste and toxic chemicals, plus oil boilers can recycle combustion gases and turn them into more energy.
A new condensing oil boiler can also reach efficiency levels of up to 93%, achieving an A-rating way ahead of old gas boilers.
Comparing Boiler Prices
How do you find lower prices for a new boiler? One way is to compare providers in your area, look at the different costs on the quotes, and evaluate several installers and brands. That way, you’ll get a broader picture of the market and can negotiate with your chosen installer with more leverage. By comparing quotes from local providers, you can end up saving up to 40% on your boiler costs, slashing hundreds off of your new installation!
Comparing brands will give you an accurate idea of the best systems you can get for your budget. And shopping local doesn’t mean you have to miss out.
Many local providers can offer boilers from top manufacturers, including Worcester, Ideal, and Viessmann. Plus, they can do it without the overheads of a national brand. Often, you’ll be able to benefit from shorter lead times, which could be vital if your old boiler is underperforming or broken.
However, comparing boiler prices can take ages. Not only do you have to search for local suppliers yourself, but you never quite know who you can trust. Sometimes it’s difficult to filter out a rogue trader and companies with hard-sell tactics.
That’s why Double Glazing On The Web takes the risk out of your investment. We’ll save you all the time and hassle of manually comparing boiler prices. When you search for a boiler through our network of local suppliers, you’ll be sure to get a great deal from an installer you can trust.
Boiler Prices From A Few Leading Brands
WORCESTER BOILER PRICES
| REGULAR GAS BOILER SERIES | SIZES | SIZE OF HOME | PRICE |
| Greenstar Ri Regular | 12 – 24kW | Small, medium, and large-sized homes | £759.15 – £877.49 |
| Greenstar CDi Classic Regular | 34 – 40kW | Large homes with multiple bathrooms | £1,062.46 – £1,363.85 |
| Greenstar FS CDi Regular | 30 – 42kW | Large homes with more than one bathroom | £1,398.39 – £1,847.10 |
| SYSTEM GAS BOILER SERIES | SIZES | SIZE OF HOME | PRICE |
| GB162 System | 50 – 100kW | Large homes and commercial properties | £1,980 – £3,600 |
| Greenstar i System | 30 – 35kW | Small, medium, and large-sized homes | £1,062.46 – £1,250 |
| Greenstar CDi Classic System | 30 – 42kW | Large homes with multiple bathrooms | £1,398.39 – £1,847.10 |
| COMBI GAS BOILER SERIES | SIZES | SIZE OF HOME | PRICE |
| Greenstar i Junior Combi | 24 – 28kW | Small to medium-sized homes with one bathroom | £767.39 – £854.88 |
| Greenstar Si Compact Combi | 25 – 30kW | Small to medium-sized homes with one bathroom | £851.90 – £952.64 |
| Greenstar CDi Classic Combi | 29 – 42kW | Medium to large-sized homes with one or two bathrooms | £1,018.80 – £1,435.01 |
| Greenstar CDi Compact Combi | 28 – 36kW | Medium to large homes with more than one bathroom | £973.44 – £1,204.32 |
| Greenstar Highflow CDi Combi | 29 – 30kW | Large homes with two bathrooms | £1,710.16 – £2,400 |
| COMBI OIL BOILER SERIES | SIZES | SIZE OF HOME | PRICE |
| Greenstar Heatslave II | 18 – 32kW | Small, medium, and large-sized homes | £2,200 – £2,500 |
| Greenstar Heatslave II External | 18 – 32kW | Small, medium, and large-sized homes | £2,400 – £2750 |
IDEAL BOILER PRICES
| HEAT ONLY GAS BOILER SERIES | SIZES | SIZE OF HOME | PRICE |
| Ideal Logic Heat | 12 – 30kW | Small, medium, and large-sized homes with more than one bathroom | £778 – £1,027 |
| Ideal Mexico HE | 15 – 36kW | Small, medium, and large-sized homes with more than one bathroom | £830 – £2,200 |
| Ideal Logic Max Heat | 12 – 30kW | Small, medium, and large-sized homes with more than one bathroom | £850 – £1,180 |
| Ideal Logic+ Heat | 12 – 30kW | Small, medium, and large-sized homes with more than one bathroom | £872 – £1,118 |
| SYSTEM GAS BOILER SERIES | SIZES | SIZE OF HOME | PRICE |
| Ideal Logic System | 15 – 30kW | Small, medium, and large-sized homes with multiple bathrooms | £735 – £830 |
| Ideal Logic+ System | 15 – 30kW | Small, medium, and large-sized homes with multiple bathrooms | £780 – £870 |
| Ideal Logic Max System | 15 – 34kW | Small, medium, and large-sized homes with multiple bathrooms | £860 – £1,150 |
| Ideal Vogue System | 15 – 32kW | Small to medium-sized homes with multiple bathrooms | £905 – £1,204 |
| Ideal Vogue Max System | 15 – 32kW | Small, medium, and large-sized homes with multiple bathrooms | £920 – £1,210 |
| COMBI GAS BOILER SERIES | SIZES | SIZE OF HOME | PRICE |
| Ideal Independent Combi | 24 – 35kW | Small, medium, and large-sized homes with one bathroom | £625 – £750 |
| Ideal Logic Combi | 24 – 35kW | Small, medium, and large-sized homes with one bathroom | £656 – £848 |
| Ideal Logic ESP1 Combi | 24 – 35kW | Small, medium, and large-sized homes with one bathroom | £725.51 – £928.61 |
| Ideal Logic Max Combi | 24 – 35kW | Small, medium, and large-sized homes with one bathroom | £860 – £1,070 |
| Ideal Logic+ Combi | 24 – 35kW | Small, medium, and large-sized homes with one bathroom | £879 – £1,011 |
| Ideal Vogue Combi | 26 – 40kW | Small, medium, and large-sized homes with one bathroom | £943 – £1,221 |
| Ideal Logic Code Combi | 26 – 38kW | Small, medium, and large-sized homes with one bathroom | £1,000 – £1,330 |
| Ideal Vogue Max Combi | 26 – 40kW | Small, medium, and large-sized homes with one bathroom | £1,109 – £1,340 |
VIESSMANN BOILER PRICES
| OPEN VENT GAS BOILER SERIES | SIZES | SIZE OF HOME | PRICE |
| Viessmann Vitodens 100-W Open Vent | 19 – 35kW | Small, medium, and large-sized homes with more than one bathroom | £794 – £1,358 |
| SYSTEM GAS BOILER SERIES | SIZES | SIZE OF HOME | PRICE |
| Viessmann Vitodens 100-W System | 26 – 35kW | Small, medium, and large-sized homes with multiple bathrooms | £1,013 – £1,094 |
| Viessmann Vitodens 200-W System | 19 – 35kW | Small, medium, and large-sized homes with multiple bathrooms | £1,191 – £1,444 |
| COMBI GAS BOILER SERIES | SIZES | SIZE OF HOME | PRICE |
| Viessmann Vitodens 100-W Combi | 26 – 35kW | Small, medium, and large-sized homes with one bathroom | £844 – £1,104 |
| Viessmann Vitodens 050-W Combi | 29 – 35kW | Small, medium, and large-sized homes with one bathroom | £858 – £861 |
| Viessmann Vitodens 200-W Combi | 26 – 35kW | Small, medium, and large-sized homes with one bathroom | £1,150 – £1,295 |
| Viessmann Vitodens 111-W DHW Storage Combi | 26 – 35kW | Small, medium, and large-sized homes with one bathroom | £1,518 – £1,632 |
| Viessmann Vitodens 222-F Combi | 19 – 35kW | Small, medium, and large-sized homes with one bathroom | £2,474 – £2,606 |
What Are The Costs Of Replacing A Conventional Boiler With A Combi Boiler?
If you have a conventional boiler in your home, you could be losing energy, particularly if it’s over ten years old. A non-condensing boiler might only have about 50% of its original efficiency. You could consider boiler replacement, changing your conventional boiler to a combi boiler, freeing up space in your home, and saving up to 40% on energy bills. So, what’s involved?
First, a boiler installation company must remove the old boiler, drain the existing heating system, and remove the old cylinders and tanks. Other work, like installing a chemical power flush and new features like de-aerators and magnetic filters, could be included in addition to the new combi boiler itself. As a result, the price of installing a new combi boiler can, on average, come to about £2,595, although for some homes, this may reduce to under £2,000, including labour.
Depending on where you site the new boiler, installation probably won’t take longer than a couple of days. Using a trusted local installer, you can be sure your boiler will be a thoroughly tested design that meets safety standards. Your combi boiler should last ten years or more, keeping your home warm and comfortable.
Choosing The Right Boiler Installers
Finding a fantastic boiler at an excellent price is one challenge. However, finding the right person to fit it can often be more frustrating. More than any other part of your home, boilers require somebody who won’t let you down when it matters.
Unfortunately, there are plenty of stories about rogue traders doing just that. It can be so easy to choose the wrong boiler installer and watch your dream of a new heating system turn into a nightmare.
Opting for a big-name national brand seems like the obvious way to avoid rogue traders. However, top brands tend to charge high prices for new boilers. Plus, you’ll probably need new parts like filters and valves for your current system, and national companies often charge premium rates for these.
You don’t need to pay top rates to install a great new boiler. One way to get brilliant boiler prices is to go with a local company for the installation. With Double Glazing On The Web, you won’t have any risks and will be able to find an installer you can trust within our network of boiler installation partners. We extensively review our network of suppliers and traders across the UK to ensure we only work with the best.
All our installers are Gas Safe companies, qualified to complete any additional work. Many offer generous boiler and installation warranties, so you don’t have to deal with repair costs, leaving you out in the cold.
Follow some of our top tips to find the right installer for you.
Always Look for Gas Safe Installers
If you’re looking for an installer to fit your boiler, then look for the Gas Safe triangle. All qualified engineers must have Gas Safe accreditation to work in the UK legally. Avoid local companies that can’t demonstrate this.
Gas Safe installers have the knowledge and expertise to fit all modern systems, as well as valves, filters, and undertake chemical power flushing. If you decide to move your boiler, they can also help create a new heating system in your home.
Additional Boiler Work
With a Gas Safe installer, you can fit a stand-alone boiler and get additional work completed on your heating system if you need it. With a trusted local company, you should expect a comprehensive installation, which may involve a full chemical power flush, which acts as a deep clean of your home’s heating system. Additionally, a reputable company can offer new key parts replacement to help your boiler perform, such as pressure valves, de-aerators, and filters, to keep the system clean and healthy.
Boiler Warranties
Getting a warranty on your boiler is vital. With a local provider, you can often get a guarantee on the design either from them or direct from the manufacturer. Always ask the question before you book an installer. A warranty can sometimes cover replacement parts or even a whole new boiler. Companies like Viessmann offer a five-year guarantee as a minimum.
Boiler Installers In My Area
The best way to find competitive boiler prices from installers in your area is to contact Double Glazing On The Web. We work with some of the best local companies throughout the UK, ensuring you can find the ideal one right on your doorstep.
Through our trusted installer network, we can handle requests for any new boiler installation, whether a system, combi, or even an oil-fired model. We’ll put you in touch with multiple companies so you can compare costs and service. You’ll waste far less time searching for suppliers, and you can negotiate with different companies to secure the best boiler prices!
We know how valuable trust is at Double Glazing On The Web, too. That’s why many of our trusted local traders have several accreditations, so you can be sure of their expertise and skill. Most of our suppliers are members of Checkatrade and Which? Trusted Traders, and all of them are Gas Safe-certified, so that you can enjoy complete peace of mind.
The accredited installers we work with can also provide additional work if needed, so you’ll get a brand-new system that offers real bang for your buck.
Find boiler prices through us that will make your investment fly. With stand-alone combi boilers costing as little as £499, you could end up recouping the cost of your investment in just a few years. Don’t pay high boiler prices. Work with Double Glazing On The Web to cut the costs of your new system!
Find Better Boiler Prices With Double Glazing On The Web
If you’re interested in getting a new boiler for your home and want lower prices from local installers, contact Double Glazing On The Web!
Fill in our online contact form today, and one of our friendly team members will get back to you as soon as possible. Feel free to ask us anything; we’ll provide you with all the advice and information you need on the best boilers to buy.
We’ll offer a fixed price quote for a new boiler and refer you to our network of local companies. Speak to as many as you want and find the best cost for your boiler installation. Evaluating different local installers and taking advantage of government incentives and schemes will drive down the final price of your new boiler.
Alternatively, call us on 0800 015 5679 today! We can’t wait to hear from you and discuss your ideas.
Frequently Asked Questions
What factors impact the cost of a brand-new boiler?
The cost of a new boiler varies based on several elements, which include the type of boiler (combi, traditional, system, or oil), the boiler size, the brand, output, and the company and installers you have chosen. There could also be additional charges for other essential work like chemical flushing, fitting new radiator valves and filters, altering existing pipework, and adding thermostatic radiator controls. Extra work means higher labour costs, so always ensure that your installer conducts a thorough site inspection and that the quotation really is the final cost.
How can I find the best deal on a new boiler?
Compare rates on different boiler models from multiple local installers. Look for Gas Safe registered agencies that offer proper warranties and that have genuine reviews. Consider the long-term savings from investing in a more efficient system, even if it means a higher upfront cost; it will save you money on lower heating costs and fewer repairs in the long run. Always check to see if you qualify for any grants from the government or your local authority. Your installer may be able to advise on this, but always do your own research.
What are the advantages of replacing an old boiler with a new, cutting-edge combi boiler?
Replacing an old, conventional boiler with a modern combi boiler offers several benefits, including advanced energy efficiency (as much as 90%), reduced energy bills, and more space in your home. A combi boiler eliminates the need for a separate warm water cylinder and tank. The compact boiler size works well in homes with limited room, and you’ll be delighted at how much more quickly you can get hot water. Combi boilers are quite simple in design with fewer mechanical parts, so they tend to stay trouble-free for longer compared to old-style, traditional boilers, and will save you money on boiler repairs.
How long does it take to put in a new combi boiler?
Installing a new combi boiler typically takes 1-2 days, depending on the complexity of the task and whether you are relocating the boiler. The method involves removing the old unit, draining down the central heating system, fitting the new boiler, and connecting it to the water and electricity supplies. Your installer should also thoroughly test the new system.
What do I need to look for with a boiler warranty?
Prices and boiler installation costs are one thing. However, it’s also important to focus on finding a product and installer offering guarantees that cover components and labour for not less than 12-24 months. Check if the warranty is provided by the manufacturer or the installer; there could be two warranties that cover different things. Some warranties, like manufacturer guarantees, are conditional on things like a regular boiler service by an approved engineer. Always read the terms and conditions carefully. A proper guarantee can provide peace of mind and protection from sudden breakdowns and expensive repairs.
