James Elston

James Elston

Published February 8, 2024

When it comes to home heating, combi boilers have become increasingly popular, offering energy efficiency, space-saving designs, and instant hot water. But with so many options on the market, understanding the Combi Boiler Cost associated with these systems can be a daunting task.

In this specialist post, we’ll break down the factors affecting combi boiler costs, the price ranges, installation expenses, and additional costs to consider, helping you make an informed decision for your home’s heating needs.

Gas Combi Boiler Cost – Overview

  • Combi boiler costs range from £1,500 to £3,000 and can include labour, parts, fittings and more.
  • Benefits of combi boilers include energy efficiency, environmental friendliness and compact size.
  • Factors such as brand quality affect the cost of a combi boiler installation, plus additional maintenance fees may be required for optimal performance.

How Much is a Combi Boiler?

Combi boiler costs can vary quite a bit, with prices ranging from budget options at £1,500 to high-end models at £3,000. Mid-range options offer a balance between cost and quality, ensuring you get the most for your money.

Several factors influence the cost of a new boiler, including brand, size, and model, which in turn affect the boiler installation cost.

Don’t forget to account for additional costs like:

  • labour
  • parts
  • fittings
  • wireless thermostat
  • boiler flue

These may contribute to the overall boiler cost. A clear understanding of these factors will empower you to make a more informed choice on the best combi boiler for your home and budget.

Benefits of Combi Boilers

One of the main attractions of combi boilers is their increased energy efficiency, especially when compared to traditional boilers. Combi boilers offer the following benefits:

  • They only heat water on demand rather than continuously heating and reheating a large storage tank of water
  • This can reduce boiler replacement cost
  • They are more environmentally friendly, as they use less energy

Another advantage of combi boilers is their compact size, as they do not require an additional storage tank. This makes them an ideal choice for smaller homes or apartments where space is limited and can be a more cost-effective option compared to system boiler cost.

Additionally, combi boilers provide instant hot water and heating by taking water directly from the mains and heating it as and when required. This eliminates the need for a separate water storage tank, allowing for simultaneous hot water and heating, which can influence the new combi boiler cost.

Factors Affecting Combi Boiler Prices

The price of a combi boiler is influenced by various factors, including brand, size, and type (gas, electric, oil). Keep in mind the manufacturer’s reputation, the quality of components used, and the customer service when selecting a combi boiler brand.

The size of a combi boiler can impact its cost due to energy output, necessary installation space, and water heating capacity, which in turn can influence new combi boiler costs.

There are also distinctions between different types of combi boilers:

  • Gas boilers, specifically gas combi boilers, utilise natural gas to heat water
  • Electric combi boilers employ electricity
  • Oil combi boilers use oil to provide central heating for your home

Finally, the installation complexity of a combi boiler can also have an impact on its cost, taking into account factors such as the amount of time and labour required, the number of materials needed, and the amount of space available.

Combi Boiler Price Ranges

The average cost range for combi boilers, or boiler costs, is typically between £1,500 and £3,000. Within this range, you can find budget options that may offer features such as a 10-year warranty, energy efficiency, and a compact size.

On the other hand, the cost of a new mid-range combi boiler, like the Worcester Bosch 2000, can be around £2,300. It comes with a 10-year warranty. These compact combi boilers are designed to fit in smaller spaces, making them ideal for modern homes.

In evaluating combi boiler prices, one should consider not only the initial cost but also the potential energy bill savings and the long-term perks of a more efficient central heating system. By comparing different brands and models, you can find the best deal to suit your needs and budget.

Combi Boiler Installation Costs

The costs associated with combi boiler installation depend on several factors, such as labour, materials, and extras, with average costs ranging from £1,500 to £4,500. These expenses can vary depending on the complexity of the installation, the type of boiler, and the experience of the heating engineers.

In the subsequent sections, we will delve into factors contributing to installation costs and strategies to minimise these expenses.

Labour Cost to Fit a Combi Boiler

Labour costs for combi boiler installation typically range from £500 to £1,500, depending on the complexity of the job and the experience level of the heating engineer. Ensure that the quote you obtain for a boiler installation covers all aspects, including labour, parts, and the boiler itself.

On average, a boiler installation can be completed within one day; however, more complex installations may take up to three days.

Securing a quote before a new boiler installation guarantees that all components – labour, parts, and the boiler itself, are accounted for. By comparing quotes from different boiler installers, you can ensure you receive the best value and service for your investment when you get your new boiler installed.

Materials and Extras

In addition to labour costs, the materials and extras required for combi boiler installation can add to the overall cost. These may include:

  • Pipework
  • Flue
  • Magnetic filter
  • Thermostat upgrades

Pipework is essential for combi boiler installation, enabling the delivery of gas to the boiler and the removal of wastewater. The average cost of pipework for combi boiler installation can range from £500 to £3,000, depending on the size and type of the boiler; however, this estimate does not include labour costs.

A flue is necessary for a combi boiler installation to expel waste products of combustion and excess water from the boiler, preventing the entry of harmful gases into the home. The cost of a flue is contingent upon its type and installation requirements.

Additional costs may also be incurred for upgrades such as smart thermostats, which can range in price from £120 to £250, depending on the manufacturer.

Replacement Combi Boiler – Conversion Costs

When replacing an existing boiler system with a combi boiler, conversion costs can come into play. The cost of converting from a regular to a combi boiler is estimated to be approximately £3,500 while converting from a system boiler to a combi boiler is estimated to be approximately £2,650.

These costs can vary depending on the type of existing system and the specific requirements of the conversion.

Additional costs may also be associated with updating a back boiler to a combi boiler, primarily due to the installation of extra copper pipework, a boiler flue, and a waste condensate pipe.

However, it’s important to consider the potential energy bill savings when transitioning from a back boiler to a combi boiler, which can be up to £580 per year.

In assessing boiler replacement costs and conversion costs, potential energy bill savings and the long-term advantages of a more efficient heating system should be taken into account. By comparing different options and considering your specific needs, you can make an informed decision that best suits your home and budget.

Additional Costs to Consider

Aside from the initial purchase and installation costs, there are additional expenses to consider when investing in a combi boiler. These may include maintenance and servicing, warranties, and upgrades or add-ons.

The subsequent sections will delve into these additional costs in greater detail, aiding you in making an informed decision about your combi boiler investment.

Maintenance and Servicing

The optimal performance and longevity of a combi boiler are reliant on regular maintenance and servicing. It’s recommended to service a combi boiler annually to ensure its continued efficiency and to maintain any warranties that may be in place.

In the UK, the average annual cost for maintaining and servicing a combi boiler typically ranges from £90 to £100, inclusive of VAT.

By budgeting for regular maintenance and servicing, you can help prevent costly breakdowns and ensure your combi boiler operates at peak efficiency.

Additionally, maintaining a consistent service record can be beneficial when it comes time to sell your property or if you need to make a warranty claim.

Combi Boiler Warranties

Combi boiler warranties can range in length and coverage, with higher-quality boilers typically offering 5-10-year warranties. Some manufacturers, such as Boiler Central, even offer a 12-year warranty provided you get it serviced annually by them.

These warranties typically cover leaks, faulty heat exchangers, and other issues associated with the boiler; however, specific coverage may differ depending on the manufacturer and model.

In assessing combi boiler warranties, the extra costs of annual boiler servicing to keep the warranty valid should be accounted for. By selecting a boiler with a comprehensive warranty, you can reduce costs and have peace of mind knowing that your investment is protected.

Upgrades and Add-ons

Enhancements and additions for combi boilers, such as smart thermostats and magnetic filters, can enhance efficiency and performance but may result in increased overall expenses.

Smart thermostats like Hive and Nest can be used to control your boiler. They also provide useful insights into your energy consumption. Depending on the brand and type of controller, an additional cost may be associated with the new boiler.

While upgrades and add-ons can increase the overall cost of your combi boiler, they can also provide long-term savings in the form of reduced energy bills and improved performance.

By considering the benefits of these enhancements, you can make a more informed decision about which upgrades and add-ons are worth the investment.

Energy Efficiency and Running Costs

The energy efficiency and running costs of combi boilers vary depending on the fuel type, boiler size, and electricity tariffs. Generally, electric combi boilers have higher running costs than gas or oil boilers due to higher electricity prices.

However, the size of a combi boiler can also impact its energy efficiency and running costs, with larger boilers potentially having higher costs due to increased energy consumption. It’s important to remember that the efficiency of the boiler itself also plays a major role in energy efficiency and running costs.

In assessing energy efficiency and running costs, one should consider potential energy bill savings and the long-term benefits of a more efficient heating system.

By comparing different fuel types, boiler sizes, and electricity tariffs, you can find the best combi boiler for your needs and budget, as well as save money for yourself.

Combi Boiler Comparison

Comparing combi boiler brands and models can help you find the best option for your needs and budget. Popular brands include:

  • Worcester Bosch
  • Vaillant
  • Baxi
  • Ideal
  • Viessmann

These brands offer a range of combi boilers with varying features, prices, and warranty lengths, allowing you to choose the model that best suits your requirements.

For example, some popular brands of combi boilers include:

  • Worcester Bosch: They boast modern design and innovative features, making them an attractive choice for many homeowners.
  • Viessmann: They produce reliable and durable yet affordable boilers, which are a few of the reasons why they are one of the biggest boiler manufacturers in Europe.
  • Vaillant: Highly regarded for their value and excellent performance, with most models boasting an energy efficiency rating of over 90%.
  • Baxi: Known for their durability and can last up to 10 to 15 years when properly maintained.

Researching and comparing combi boiler brands and models allows you to make the best decision for your home’s heating needs and budget.

New Boiler Costs – Final Thoughts

In conclusion, understanding combi boiler costs, installation expenses, and additional factors is crucial for making an informed decision when investing in a new heating system.

By comparing different brands and models, considering energy efficiency and running costs, and factoring in warranties and potential upgrades, you can find the best combi boiler for your needs and budget.

With the right information and a thorough comparison, you’ll be well on your way to enjoying the comfort and efficiency of a new combi boiler in your home.

Frequently Asked Questions

What is the average cost of a new combi boiler?

On average, a new combi boiler costs between £1,500 and £3,000, including installation, warranty registration and VAT.

New gas boiler cost can vary depending on numerous factors but can be very much worth it for more efficiency and reduced heating and hot water costs.

Is it still worth getting a combi boiler?

Combi boilers are highly energy efficient and can save you a lot on your heating bills, so it’s definitely worth getting one.

A new boiler cost can seem a lot at first, but there are tons of different payment methods and long-term cost benefits that actually make it a very economical option.

Why are combi boilers being phased out?

The UK government’s commitment to reaching net zero carbon emissions by 2050 is the primary reason for phasing out gas combi boilers. To reduce emissions, alternative options to fossil fuels are essential.

How much does it cost to fit a combi boiler?

Installing a combi boiler typically costs between £1,600 and £3,200, depending on the specific boiler chosen and the time it takes to install.

How often should a combi boiler be serviced?

For optimal performance and to maintain any warranties in place, a combi boiler should be serviced once a year.

James Elston

James Elston

Boiler Expert


James Elston is the top boiler replacement and heating expert at Eco Happy. He has over 20 years of experience in the industry, focusing on Gas Safe boiler installations and offering home-heating and energy-saving solutions to homeowners across the UK. From sourcing the most energy-efficient combi boiler to providing specialist heating advice, James ensures that Eco Happy maintains the highest standards and best customer service.

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