Boiler Replacement & Next Day New Boiler Installation

james murfin
Written by James Murfin
Updated on 30th May 2024
Posted on 21st May 2024
Topic: Boiler Guides
Boiler Replacement UK and New Gas Boilers Like for Like Swaps

Boiler replacement and new boilers fitted next day

boiler replacement and new boiler guide

Struggling with a faulty boiler or sky-high energy bills? Opting for a boiler replacement can mitigate these headaches.

This no-nonsense guide from Boiler Central covers everything you need to know about new boilers, including getting a new boiler quote, the costs, selecting a suitable model, and understanding the installation process.

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Replacement Boiler Guide Overview

  • Replacing an old or inefficient boiler can improve home warmth, reduce energy bills, and increase property value, with modern A-rated boilers potentially saving up to £800 per year on energy costs.
  • The cost of a new boiler varies by type and brand, with options like combi boilers, system boilers, and regular boilers, and expenses ranging from £500 to £3,500. Financing options are available to make replacement more affordable, with fixed price quotes ensuring clear budgeting.
  • Proper boiler installation and aftercare are essential, with Gas Safe Registered Engineers required for compliant installation and regular maintenance needed to keep the warranty valid and ensure the boiler remains safe and efficient.

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Getting a New Boiler Replacement & Installation

The need for a boiler replacement often arises when your current boiler is broken, is old, inefficient, or frequently breaks down.

You might be feeling the chill during winter months, or perhaps you’ve noticed a surge in your gas bills.

These signs could indicate the need for a new boiler installation. But why should you consider replacing your boiler?

Well, the benefits are multifold. New boilers can improve your home’s warmth and comfort, lower your energy bills, and even increase your home’s value. These benefits come along with the installation of a new condensing gas boiler.

Our Boiler Installation Company Owner Says:

As homeowners, we all know that we should ensure that our homes are warm all year round without fear of boiler breakdowns. Ensuring all our customers choose the right boiler installation for their needs is so important to us here at Boiler Central.

James Elston

Director Of Boiler Central

When to get a new boiler

If you are unsure whether you need a new boiler or not, use our scoring table to help you decide:

Have you repaired your boiler twice or more in 1 year?100
Do you want to remove a hot water tank?100
Do you have an inefficient back boiler?100
Is your boiler over 7 years old?50
Is your boiler costing you more in energy bills?50
Is there potential for your boiler to stop working?50
Is your boiler out of warranty?50
Do you think your boiler isn’t working properly?50

Now add up your score and see your result:

TotalWorth it?
10+Definitely Yes

As you can work out from the questions, these are the main reasons that people choose to get a replacement boiler. Hopefully, this has helped you decide, however, read on for more information about what’s included with all our boiler installations.

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What kind of fuel does your boiler use?

What is included with a replacement boiler and installation?

Right from choosing your replacement boiler, here’s exactly what the installation involves in several steps:

Before installation

  • We ask about your heating and hot water demands
  • We select the best size boiler and model of boiler for your home
  • You will book an installation date for one of our Gas Safe engineers to attend your home

During installation

  • We will remove your old boiler
  • We’ll prepare the installation site by running the necessary gas, water and electricity lines
  • We will clean your central heating system
  • We will Install the boiler, connecting it to the gas and water pipes
  • We will ensure the flue site is sealed, and there is proper ventilation

After installation

worceser 4000 installation
  • We will commission the boiler to ensure it’s functioning correctly and safely.
  • We’ll set up the controls and thermostat and set them to the desired settings for you.
  • We’ll hand over to you with instructions on how to operate and best use the boiler.
  • We will register your Gas Safe installation and your manufacturer warranty.

This may sound complicated, however, gas boiler installation is really easy for an experienced Gas Safe boiler engineer from Boiler Central, as we install boilers across the UK every day (except Christmas day), and you’ll be glad to know as expert installers that Boiler Central is Gas Safe registered.

Choosing the right replacement boiler

Choosing the right boiler is a vital part of the process. The cost, boiler type, and efficiency should align with the specific heating requirements of your property.

Investing in contemporary and most energy efficient boilers offer long-term advantages such as consistent home warmth, hot water, and improved energy efficiency, leading to cost savings over time.

Upon installation of your boiler, a Gas Safe registered engineer will thoroughly check its functionality and explain the controls in detail. Therefore, considering a boiler replacement is a wise decision for homeowners.

Read more about why choosing the right boiler installers is so important.

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What kind of fuel does your boiler use?

Video: Best Boiler Replacement Guide

This video will guide you all about the best boiler replacements for you.

Identifying When You Need a New Boiler

Is it time for you to replace your boiler? Frequent breakdowns, leaks, and consistently escalating energy bills are telltale signs that it might be time to consider a new boiler.

But what about the potential cost savings? By upgrading from an old G-rated boiler to a modern A-rated boiler through boiler installations, it is possible to achieve savings of up to £800 per year on energy bills.

Most boilers now have energy saving technology such as boiler modulation or weather compensation kits to use even less gas!

However, if your boiler is under ten years old and receives regular annual servicing by a certified Gas Safe engineer, a replacement might not be necessary.

Selecting the Right Boiler for Your Home

With a variety of boilers available for home heating, making a choice can be overwhelming. The available types for home heating are gas combi, system, and regular boilers, each with its unique characteristics.

When choosing the appropriate type of boiler, consider the size and layout of your property, the availability of space for a hot water cylinder, and your budget or brand preferences.

Regular boiler replacement

For larger properties with multiple bathrooms, regular boilers can deliver substantial amounts of hot water at a rapid pace, enabling simultaneous supply to multiple taps and showers.

Whilst regular or conventional boiler installations have declined in recent years, with some manufacturers stopping them all together, they do have their place in many homes across the UK

Combi boiler replacement

On the other hand, having a combi boiler fitted is an optimal choice for a home with fewer occupants due to its ability to deliver instant hot water and efficient central heating without requiring separate tanks or cylinders.

Combi boiler installation is usually quick and easy as there are no external hot water tanks to deal with. You can order a replacement combi boiler and installation online super quick and easy too with our range of payment options.

System boiler replacement

System boilers, which function within a closed system using a hot water cylinder, are suggested for properties with multiple bathrooms or hot water outlets. A system boiler installation can be considered as an alternative to central heating boiler systems for homes that are not suitable or have too high hot water demand for a combi boiler.

We have a range of system boilers with installation available online, and you can get one fitted as soon as tomorrow if you order it before 2pm!

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Where can I put a new boiler?

Ideally, the boiler should be placed on an exterior wall so that the boiler flue can be put directly through the wall to the outside.

This usually keeps installation costs down as installing a vertical flue costs more. However, essentially you could install one anywhere in your home if required.

Common places are putting a boiler in a kitchen cupboard, but other places that people request are such as a boiler in a bathroom, boiler in a loft or garage,

If you are converting from a system or conventional boiler, then another popular place is the airing cupboard where the hot water cylinder used to be!

Choosing the best replacement boiler company

As the best combi boiler replacement company, we love helping our customers and getting a quote for a new boiler online has never been easier.

Homeowners and landlords alike, we look at all your combi boiler options at Boiler Central, from a direct swap to a complete back boiler conversion, we can pretty much arrange anything you require.

To help, we’ve produced this boiler installation guide with everything a homeowner, tenant, landlord or billpayer will need to know and you can use the contents above to find the specific questions you have in mind.

If you want to choose us as your new boiler installer, simply click get a quote now, and we can be there as soon as tomorrow if you order before 2pm weekdays!

Read more – can a plumber install a boiler?

Our new boiler installation service and getting the perfect choice for your home

worcester bosch 8000 lifestyle range

This guide will give you everything you need to know about getting a new boiler installation for your property from our experts at Boiler Central, has installed over 15,000 boilers in the UK since we started, so we know a thing or two.

We can’t stress enough how important it is to replace a boiler to get the right one for your central heating system to ensure that running costs are low and your replacement boiler can cope with the demands and needs of your home.

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What kind of fuel does your boiler use?

The Cost of Replacing Your Boiler

While the thought of replacing your boiler might seem daunting due to the costs involved, it doesn’t have to be.

The typical cost for a standard like-for-like combi boiler swap/replacement ranges from £1,800 to £3,500, inclusive of installation.

However, more affordable boiler options start from around £1,600, varying based on the model and seller.

The total cost for your boiler installation can be influenced by factors such as the type of boiler, its output, the brand, installation cost, and the location of the boiler.

For an accurate and up-to-date price click get a quote now!

This will ensure you have the most current pricing information available.

There are also numerous financing options accessible for boiler replacement, such as up-front payments, interest-free credit for up to 2 years, or customised loan arrangements based on personal circumstances.

Price Comparison for Different Boiler Types

When it comes to boiler installation, the prices can vary significantly depending on the type of boiler.

The typical expenditure for replacing a system boiler falls within the range of £1,900 to £3,500, while the replacement of a heat-only boiler typically costs between £2,000 and £2,500.

For a combi boiler installation, the typical cost can range from £1,900 to £3,500.

The variation in prices among different types of boilers can be attributed to a few factors.

System boilers typically range from £800 to £2,000, heat-only boilers from £900 to £1,500, and combi boilers which are the most popular, ranging from £700 to £2,500 due to the integration of hot water production.

The cost of a new combi boiler is predominantly influenced by the size of the home and the number of radiators, as these elements impact the capacity and specifications of the required boiler.

Choosing the Right New Boiler for Your Home

While new combi boilers are a game-changer for many homes in the UK, understanding their strengths and weaknesses compared to other boiler types is crucial. Here’s a quick breakdown to help you pick the perfect fit for your property type:

Combi Boilers vs. Conventional Boilers

Conventional boilers with hot water tanks are ideal for large families with high hot water demand. However, they require significant space due to the separate tank setup. Combi boilers, on the other hand, are compact powerhouses, eliminating the need for bulky tanks and making them perfect for smaller homes.

Combi Boilers vs. System Boilers

System boilers offer a compromise by utilizing a hot water cylinder for high hot water demand but eliminating the need for a cold water storage tank. This translates to more space compared to combi boilers but less compared to conventional setups.

Finding Your Perfect Heating Solution

By understanding advanced combi boiler features and their comparison to other boiler types, you can make an informed decision. Consider your home size, water pressure, and hot water needs to find the boiler that unlocks peak performance and delivers ultimate comfort and energy efficiency.

How Financing Can Make Boiler Installation More Affordable

Financing options can make boiler installation more affordable and manageable.

These include interest-free credit and monthly payment plans tailored to your circumstances.

The payment plans for boiler replacement offer options such as up to 4 years’ interest-free credit with no deposit required, or the alternative of paying a 10% deposit and settling the balance after installation.

These options provide homeowners with flexibility and affordability.

When purchasing a new boiler, customers have the flexibility to choose from various payment methods. These options include:

  • Cash payment
  • Pay monthly boiler deals
  • Upfront payments
  • Tailored loans to suit the owner’s financial situation.

Compare replacing boilers for different properties

Learn more below about how we determine the signs of old boilers (read more about how long boilers last here), types of boilers, boiler quotes, and deals, hydrogen-ready boilers (20% blend).

Did you know if you install a modern boiler, it can increase your house price?

Prospective boiler buyers are starting to look at what state the central heating system is in, and even if you are a landlord, prospective tenants are asking the right questions.

It’s almost as important as how big the garden is! – Find out how old your boiler is here.

The replacement boiler conundrum – Is it really worth the hassle? We’re obviously going to say yes, but it is backed up by stats from governing bodies like the Energy Saving Trust

Top-Rated New Boilers for Your Central Heating System

new boilers from viessmann

When considering a new boiler for your central heating system, it’s wise to consider top-rated brands. The top-rated boiler brands comprise:

  • Worcester Bosch
  • Viessmann
  • Ariston
  • Vaillant

One notable model is the Worcester Bosch Greenstar 4000 combi, which has been recognised as a Which? Best Buy. I

t is particularly well-suited for small to medium-sized homes, making it a popular choice for many homeowners.

Apart from being top-rated, it’s also important to consider the warranty that comes with your boiler. For example, with all Viessmann 100-W boilers, customers can anticipate an exclusive 12-year manufacturer-backed warranty, demonstrating the brand’s assurance in the reliability of their products.

Worcester Bosch: A Leader in Boiler Excellence

Worcester Bosch is widely recognised for its boilers and is held in high regard. The brand is renowned for its excellence and its award-winning combi boilers. Their combi boilers are distinguished from their competitors by:

  • Durability
  • Minimal common errors or faults
  • Compact combi boiler and quiet design
  • Powerful performance with minimal gas consumption
  • Combination of performance and efficiency

Worcester Bosch’s well-known combi boiler models, including the Greenstar CDi Compact, Greenstar 4000, Greenstar 8000 Style Combi, and Greenstar 8000 Life Combi, boast attributes such as contemporary design, user-friendly displays, customisable hot water settings, broad power range, minimised energy and water wastage, optional intelligent filling system, wireless connectivity, and a warranty of up to 12 years.

Viessmann: German Engineering for Your Home

Viessmann offers a range of notably energy-efficient boiler models, such as:

  • Vitodens 100-W with an efficiency between 92 and 94 per cent
  • Other gas condensing boilers from Viessmann that achieve a minimum efficiency level of 98 per cent
  • Vitodens 050-W and Vitodens 200-W achieving efficiency ratings of up to 97%

Their boilers demonstrate superior energy efficiency, and the Vitodens 050 offers fantastic value for money.

German engineering plays a a key role in enhancing the efficiency of Viessmann boilers by facilitating faster heating delivery, reducing fuel consumption, and maintaining consistent high quality and reliability of the heating systems.

When should you NOT get a replacement?

If your central heating boiler is under ten years old and has a regular service every year by a Gas Safe registered engineer, then there is a good chance that getting a replacement boiler won’t save you any money at all on your energy bills.

If you are in doubt, speak to an expert or book one of our engineers for a boiler service now, as they can maintain your boiler’s efficiency whilst also advising on whether a replacement is right for you!

A one off boiler service costs around £100 which is much cheaper than expensive repairs and can help keep your gas bills down too.

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How to get the right replacement boiler size for your home

Hot water usage

Deciding on the best type of boiler replacement depends entirely on your home; for example, a small boiler installation in a London flat with 1 bedroom would have a different boiler than a 5-bedroom home in Mayfair.

Here, we have listed some main features to look out for when choosing a combi, system or conventional boiler, and the key things to factor into your decision are:

1. Hot water usage:

Large families that use a lot of hot water will find a regular boiler or system boiler more efficient.

Therefore, a home with fewer occupants will benefit from a combi boiler

This will mean that running costs are lower, which will keep your energy bills down.

2. Home size:

Because combi boilers don’t require hot water cylinders, we can install them in a home with less space. See our recommended replacement boiler size chart or use this boiler size calculator to get the best boiler for your home

Size of Home & Hot Water DemandCombi Boiler Output
1–3 bedrooms, 7–10 radiators, 1 bathroom20–29kW
3–4 bedrooms, 11–15 radiators, 1–2 bathrooms30–35kW
4+ bedrooms, 16–20 radiators, 2+ bathrooms36–60kW

3. Solar water heating compatibility:

If you’re using solar to power your hot water, it’s essential to know that many combi boilers are less compatible and inefficient with this heating system. Contact us if you’re unsure.

Read more: Types of Boilers: Which are Best for Your Home?

When replacing regular boilers or system boilers, you should be able to keep the hot water cylinder to go with your boiler installation.

Combi boilers are the most popular in the UK. A combi boiler, also known as a ‘combination boiler’, is a 1-unit system that typically lives in a kitchen cupboard.

Whether it’s hiding a combi boiler in a kitchen cupboard or efficiency you are looking for they are brilliant unless you require a high demand for water at once to multiple taps. In this case, you would be better with a regular boiler.

Arguably, a replacement boiler is an investment. Over a period of time, especailly now with ridiculous gas prices, you could get your money back. And the more they rise the greater this investment becomes.

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What kind of fuel does your boiler use?

Seamless Installation Process with Gas Safe Registered Engineers

Gas Safe Registered Engineers play a critical role in the installation of your boiler. These are certified professionals authorised to work with gas in the UK, ensuring safe operations and compliance with mandated safety standards.

They are required to have accredited qualifications for the particular gas work they undertake and to have a distinct Gas Safe ID card that verifies their certified areas of expertise.

What to Expect on Installation Day

The installation of a new gas boiler typically takes between 1 to 3 days on average. During the process, you may face disruptions such as:

  • The need to lift carpets
  • Take up floorboards
  • Drill into walls
  • Access the entire property
  • Replace pipework

Prior to the installation of a boiler, it is essential to conduct a chemical system flush to maintain system water cleanliness and prevent potential damage to the new boiler caused by system debris.

Furthermore, adjustments or enhancements to the pipework may be required to ensure proper fitting of the boiler.

read more – can I install a boiler myself?

New boilers for central heating comparison table

Compare boilers for central heating here depending on the number of bathrooms and radiators you have. We have plenty of choice for all gas central heating boilers online now for you to choose from too.

Replacement Boiler TypeHome SizeBathrooms & ShowersRadiatorsOther Reasons To Buy
Combi Boilers1–4 BedroomsUp to 2 Bathrooms5–20 RadiatorsCompact & Easy To Install
System Boilers3+ Bedrooms2+ Bathrooms10+ RadiatorsHigh Hot Water Demand
Regular Boilers3+ Bedrooms2+ Bathrooms10+ RadiatorsLow Water Pressure

Maximising Energy Efficiency with Your New Boiler

With your new boiler in place, it’s time to maximise its energy efficiency.

Smart controls for boilers offer a method to enhance home heating systems through precise room temperature control and scheduling, ultimately leading to improved boiler operation efficiency and reduced energy consumption.

Consider incorporating new controls, Thermostatic Radiator Valves (TRVs), and sensors to boost the energy efficiency of your heating system.

For example, the Bosch EasyControl, when paired with TRVs, provides comprehensive heating control, resulting in enhanced efficiency.

By installing a new heating system with smart control and a system filter, it’s estimated that you could save up to £300 annually on your energy bills, according to the Energy Saving Trust.

In addition to enhancing boiler efficiency, it’s also advisable to invest in a smart thermostat, as it can lead to additional reductions in gas and electricity consumption.

Smart Controls and Thermostats

Smart thermostats and controls for home heating systems are internet-connected devices that facilitate remote control of your heating system.

They include room thermostats, radiator thermostats, and other devices aimed at improving energy efficiency and comfort. Their features encompass remote temperature and schedule adjustments, behavior learning, and compatibility with voice assistants.

Among the top smart controls and thermostats for boilers are:

  • Hive Thermostat Mini
  • Google Nest Learning 3rd Gen
  • Drayton’s Wiser Smart Thermostat
  • Tado Smart

These are compatible with all types of boilers.

Built-in Top Tech for Energy Saving New Boilers

Tired of battling inconsistent heating and skyrocketing energy bills? Combi boilers are the secret weapon you’ve been waiting for.

These compact marvels not only deliver instant hot water but also boast cutting-edge features that redefine home comfort and efficiency. Let’s crack open the code and explore what makes combi boilers so innovative:

Weather Compensation Kits Technology

Imagine a boiler that anticipates your needs! With weather compensation, your combi utilises an external sensor or local weather data to adjust its output based on the outside temperature.

This translates to a system that’s constantly optimising itself, reducing energy consumption and ensuring a consistently warm haven – perfect for keeping you cosy all year round.

Boiler Modulation for Lower Bills

Traditional boilers are like fire-breathing dragons, blasting heat at full force. But combi boilers with modulating burners are the energy-saving ninjas of the heating world.

This boiler modulation means they adapt their output to precisely match your heating demand, seamlessly shifting between low and high settings. Think of it as having a dimmer switch for your boiler!

This not only translates to lower fuel costs but also ensures a more comfortable and consistent heating experience.

Insulation and System Upgrades

Insulation is another key factor in enhancing the energy efficiency of your home. Suitable insulation types for residential properties with boilers include:

  • Mineral wool
  • Fiberglass
  • Wood
  • Cavity and internal wall insulation
  • Suspended and solid floor insulation
  • Foam board (polystyrene, polyisocyanurate, polyurethane)
  • Insulating concrete forms
  • Spray foam insulation

To further minimise heat loss and energy expenses, consider comprehensive insulation across the property, incorporating:

  • Loft insulation
  • Double glazing
  • Draft proofing
  • Insulating the roof, walls, and floor

The average cost of insulating a loft in a three-bedroom semi-detached home with a gas boiler system using spray foam insulation is approximately £3,500.

However, this cost may vary depending on the size of the home and the type of insulation used.

Preparing for Your Boiler Replacement

Before embarking on the boiler installation process, it’s important to get your home ready.

Here are some steps to follow:

  1. Clear the vicinity around the existing boiler and radiators.
  2. Ensure adequate working space for the engineer.
  3. Switch off the hot water and thermostat.
  4. Allocate approximately 60cm or 600mm of space from the fixed points around the boiler to ensure a smooth installation process.
  5. Ensure a gap on all sides, including roughly 20 cm above and below the boiler, to allow sufficient clearance for the engineer.

A thorough understanding of the installation process aids in proper preparation and ensures a smooth execution.

A Gas Safe engineer will assess the installation area and existing setup prior to commencing work.

Clearing the area and having a good grasp of the process will facilitate a seamless replacement of your boiler.

Fixed Price New Boiler Quotes and Like-for-Like Price Promises

Knowing the total cost upfront can prove beneficial when contemplating a boiler replacement.

You have the option to receive a fixed price boiler quote online, providing you with a clear understanding of the total cost for your boiler replacement upfront.

Based on the boiler you’ve chosen new boiler costs will vary, but a fixed price quote can be obtained online in as little as 20 seconds, and there are no additional costs associated with this online service.

The quote encompasses all the necessary components for the installation, without any undisclosed additional costs, enabling clear and precise budgeting for your boiler replacement.

If you need help choosing the best combi boiler replacement for your home, fill in our survey and get a fixed price online today. Get my boiler>.

Like teachers used to say: if you don’t know, ask. The right replacement boiler is so important, don’t make a mistake.

How long does it take to replace a combi boiler?

Depending on the work required, the time required to fit a boiler will vary. A simple swap from an old combi boiler to a new combi boiler is straightforward and usually takes 4–6 hours for a Gas Safe engineer to fit.

If you want to replace a system boiler with a combi boiler, this can take longer as there’s extra work to disposing the old water tank.

Read below to learn more about emergency gas boiler replacement here, other types of replacement and changing a system boiler to a new combi boiler.

Some like it hot. Some like it really hot, really quickly. System boilers are unrivalled at hot water delivery.

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What kind of fuel does your boiler use?

Can I change the boiler I want to replace?

removing a tank when getting a new boiler

Yes, changing a boiler type to aid energy efficiency or make space in your home is becoming increasingly popular.

Most people choose the boiler when replacing the same type, but converting from a system boiler to a combi boiler is always an option.

When you decide to convert from one type of boiler such as a conventional boiler to a different one, you rearrange pipework and either remove or add a hot water tank or cylinder.

All these can be quickly completed in 1-2 days by a fully trained and qualified heating engineer.

One thing you will need to remember, though, is that changing a conventional boiler to a combi or different unit will come at a cost due to the amount of work involved.

If you have made up your mind or don’t have much choice, you can now find out how much a conversion is in under 20 seconds online with Boiler Central.

Read more – Electric boiler installation guide for an alternative central heating system.

New combi boiler replacement on finance

A combi boiler replacement costs significantly less than regular models because these models are less complex, however, the price of your combi replacement will depend on the labour required to fit in the model of your choice.

New boiler financing options

Some combis are more expensive too, but that doesn’t mean you can’t afford one. Help is at hand with our panel of lenders here at Boiler Central.

New boiler financing options

If you’re overwhelmed by the cost of your boiler replacement, don’t fret. There are many boiler finance options available to you.

We have different lenders with different acceptance criteria to help you get the boiler you want.

We offer access to a boiler with 0% interest-free financing, interest-bearing credit, and monthly payment options regulated by the Financial Conduct Authority, plus inclusive finance for bad credit boiler finance so everyone can pay monthly for a new boiler.

The new boiler warranty length is factored into the cost along with your satisfaction and ability to remain stress free at home after a long day of grafting

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What kind of fuel does your boiler use?

Cheap boiler replacement

If you are looking for a cheap combi boiler, you can choose from some excellent options on the market.

New Alpha boiler

It must be said that, in general, you will find that the cheaper boilers are, the shorter the warranty will usually be.

For example, you can pick some budget boilers with installation up for £1,499, but they may have a two or 5-year warranty.

If you spend a little more than these cheap boilers, you can get more extended warranties, from 7 years to 10 years, from manufacturers like Worcester Bosch.

Getting the cheapest replacement boiler is not always the most brilliant idea. You may be better off getting a more expensive boiler with a more extended warranty but finance it over 10 years so it’s paid off in manageable chunks.

Boiler Central offers 1 to 10-year finance, so get a quote here to see your options. You can even see the monthly repayments and ensure that it’s cheap enough when you replace your boiler.

What are the cheapest replacement boilers?

Below we round up some of the cheap gas boilers that you can get your hands on if these are your desired price:

  • Navien NCB 300 combi boiler
  • Worcester Bosch 1000 combi boiler
  • Alpha E-tec boilers – Fantastic replacements from 29kW power
  • Vaillant boilers – They have some cheap boiler options in their range

Many of the above cheap boiler installation options are in the region of £1,699 model and retailer dependent – Read more here about cheap combi boilers.

Best Boiler Replacement Deals and Offers

While contemplating a boiler replacement, make sure to look into available deals and offers. Several of the top boiler replacement deals may incorporate a warranty of up to 12 years on all Worcester Boilers and Viessmann boilers, along with complementary perks such as a complimentary wireless thermostat or an enhancement to a smart thermostat.

Taking into account the total cost of the boiler, installation expenses, and any associated costs related to replacing the old boiler is vital when evaluating boiler replacement deals. Additionally, consider the suitability of the boiler for your specific requirements and its energy efficiency.

Aftercare and Servicing: Maintaining Your New Boiler

Once your boiler is installed, regular maintenance is imperative to prevent potential issues such as:

  • Rusting or corroding internal components
  • Leaks
  • Debris accumulation
  • Freezing in the condensate pipe
  • Mechanical failures
  • Gas problems, including inefficient burning and emission of hazardous gases like carbon monoxide

Annual servicing ensures the boiler operates safely and efficiently.

Remember to service your boiler annually to uphold the validity of the manufacturer’s warranty. Companies like British Gas provide a comprehensive aftercare package that encompasses a warranty of up to 12 years, offering coverage for annual servicing and various boiler maintenance requirements.


To wrap up, replacing your boiler is an investment that can improve your home’s comfort and energy efficiency, and even save you money on energy bills in the long run.

From understanding when you need a boiler, to selecting the right type, navigating costs, and ensuring a seamless installation process, this guide has covered all the key points you need to know.

With Boiler Central you can get interest free boilers over 2 years, buy now, pay in 12 months or spread the cost over 10 years if required and pay as little as around £10 per month!

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What kind of fuel does your boiler use?


Are boiler replacements the right option?

Having an inefficient boiler can lead to high gas bills and negatively impact the environment. Upgrading your boiler can save you up to £880 per year on energy bills.

It’s best to replace your boiler before the winter months, as most homes have their heating on during this time. If you’re concerned about energy costs, consider investing in a smart thermostat to further reduce gas and electricity usage.

Get a fixed price online now – click here >

How easy is getting a new boiler?

It couldn’t be simpler when getting a boiler replacement.

Gone are the days when you have to call British Gas (who are around 3 times as much as us, seriously) who would send out a surveyor to your home.

Well, we say surveyor… They are salespeople disguised as a surveyor.

Now you can order a boiler upgrade from anywhere worldwide if you have an internet connection from your phone, tablet, or desktop computer.

Get a boiler quote with an instant finance decision online – Click here

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What kind of fuel does your boiler use?

Which is the best new boiler?

There are many boilers to choose from in the UK but here we have ranked them in order which we think are the best then check out our best combi boiler guide for a more in-depth review.

With the best brands like Viessmann, Worcester Bosch, Ideal and more all competing with a wide range of models and outputs then, you can guarantee you can get the perfect boiler for your home online now.

What to do next to get fast gas boiler replacement in 24 hours?

Using Boiler Central’s online quotation system to get the perfect boiler, answer nine simple questions about your home and water usage to find the fuel and boiler that’s efficient for you.

Once we’ve received your information, we’ll act as a credit broker to help you finance your boiler replacement if you require finance.

You can also pay after boiler by card, Paypal, or even buy now and pay in 12 months.

We’ll provide a list of boilers we can install, including a budget replacement boiler right through to mid and top-end boilers, by answering 9 simple questions.

Next, choosing the best boiler replacement for your home is down to you.

All the recommended units will be suitable, but you need to pick one that’s within your budget, or if there’s a particular brand you like then you can choose them.

Are boilers expensive to replace?

Replacing a boiler can be expensive, with costs ranging from £1,500 to £4,000 on average. However, installing a modern, energy-saving boiler may lead to long-term savings on energy bills.

Is it worth replacing a 20 year old boiler?

Yes, it is worth replacing a 20 year old boiler, as older boilers such as back boilers need converting or replacing as they are significantly less efficient compared to newer ones, with efficiency dropping to 50-60% after 20 years.

It’s recommended to consult with a Gas Safe engineer to determine if replacement is necessary.

What are the indicators that may suggest the need for a new boiler?

If you are experiencing frequent breakdowns, leaks, and rising energy bills, it may be time to consider a new boiler. These are significant indicators of a potential need for a replacement.

What are the benefits of a combi boiler for a home with fewer occupants?

A combi boiler is a great choice for a 2 bedroom home with fewer occupants because it provides instant hot water and efficient heating without the need for separate tanks or cylinders.

How does German engineering enhance the efficiency of Viessmann boilers?

German engineering enhances the efficiency of Viessmann boilers by facilitating faster heating delivery, reducing fuel consumption, and maintaining consistently high-quality and reliable central heating systems.

After Boiler Central has installed your boiler

When your Gas Safe installation is complete, we will contact the boiler manufacturer to register your warranty.

If you have taken up one of Boiler Central’s offers of a free 2-year extra warranty worth £500, this is automatic, and we will register your details on our system.

Also, at Boiler Central, we love how good our customer service team is, so in the unlikely event that there are installation issues with your new boiler, we are on hand to resolve this for you ASAP.

You can call us any time, and we will also reach out to you throughout the day to ensure that everything is going as you expect!

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Written by
james murfin
James Murfin Gas Safe Registered Heating Engineer
Posted on: 21st May 2024
Topic: Boiler Guides

With over 15 years experience, James Murfin is our expert Gas Safe registered heating engineer at Boiler Central. He knows gas boilers, boiler installation and replacements inside out. James has lent us his expertise to assist us online in providing our customers with up to date and factual information on all things gas boilers. From annual gas boiler servicing to fitting the best boilers, James is on hand all year round to give his advice.

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