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Last updated: 8th March, 2024


Vaillant Combi Boiler Costs

Vaillant Combi Boiler Costs

Key takeaways

  • Vaillant combi boilers offer an efficient, space-saving heating solution.
  • Integrating advanced technology, these boilers come at various price points to accommodate diverse household needs.
  • Installation costs are variable, taking into account the model chosen and specific circumstances of each home.

As Vaillant continues to innovate, integrating smart technology and improving energy performance, their boilers maintain a strong reputation for reliability and quality.

In 2024, consumers exploring heating solutions are met with a wide range of options, with Vaillant combi boilers emerging as a prominent choice for many homeowners. Known for their efficiency and compact design, combi boilers by Vaillant provide both central heating and hot water from one unit, without the need for a separate water tank. This space-saving solution is becoming increasingly popular in modern homes where conserving space and energy efficiency are top priorities. 

As Vaillant continues to innovate, integrating smart technology and improving energy performance, their boilers maintain a strong reputation for reliability and quality.

The cost of Vaillant combi boilers is a reflection of their enhanced features and the expenses associated with adapting to stringent environmental regulations. The models range in price, starting from more budget-friendly options suitable for smaller homes to premium versions geared towards larger properties with greater heating demands. 

Additionally, the cost to install these boilers varies, with several factors influencing the final price, including the complexity of installation and regional variations in labour charges.

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Vaillant Brand

Vaillant has established itself as a prominent name within the heating industry, offering a variety of boilers that cater to an array of household needs. The brand, which has origins dating back to the 19th century, is known for its reliability and the quality of its heating solutions.

The company's dedication to innovation is demonstrated through its range of combi boilers that integrate advanced technologies. These combi boilers are designed to provide efficient and on-demand heating and hot water without the need for separate storage tanks or cylinders, making them a compact choice for homes where space is at a premium.

Vaillant's product line-up includes several models that vary by output rating, catering to different sizes of homes and hot water demands. Some distinguishing features of the brand's combi boilers are:

  • Energy efficiency, which can lead to cost savings

  • Integration with smart home systems

  • Quiet operation, ensuring minimal disturbance

Boiler Type

Notable Characteristics

Vaillant combi boiler

Space-saving, efficient, smart technology

Vaillant system boiler

Suitable for larger homes with higher demand

Vaillant's commitment to the environment is evident in their efforts to produce eco-friendly boilers, aligning with contemporary environmental standards and regulations. The boilers are designed to reduce carbon emissions and have an impact on lowering the carbon footprint of households across the UK.

Renowned for their customer service and extensive warranties, Vaillant provides consumers with the assurance of long-term support and maintenance. These boilers are readily available through a wide network of suppliers and installers, making it convenient for customers to purchase and maintain their Vaillant heating systems.

Vaillant Combi Boilers: Key features and technical specifications

Vaillant combi boilers stand out for their exceptional efficiency and reliability, offering a range of models catering to various household sizes and demands.

Vaillant ecoTEC plus Combi Boiler

The ecoTEC plus is renowned for both its efficiency, with an ErP rating of A, and reliability. Key specifications include:

  • Operational efficiency of 89.3%, which can lower energy bills significantly.

  • Available in various outputs to accommodate different home sizes.

  • Compact design for easy installation in small spaces.

Vaillant ecoTEC exclusive Combi Boiler

For those seeking advanced features, the ecoTEC exclusive offers:

  • Top-tier efficiency with an ErP A-rating, reflecting reduced energy consumption and costs.

  • Innovative technologies for consistent performance.

  • Known for its quiet operation and eco-friendly credentials.

Vaillant ecoFIT pure Combi Boiler

The ecoFIT pure caters to users needing:

  • Space-saving solutions, with a compact and unobtrusive boiler design.

  • A balance between performance and affordability.

  • A user-friendly interface with simple control mechanisms for daily use.

Vaillant ecoTEC pro Combi Boiler

The ecoTEC pro is suitable for properties with:

  • A high demand for hot water and heating while maintaining efficiency.

  • Smaller household spaces, considering its compact footprint.

  • An emphasis on trustworthy function underpinned by Vaillant's manufacturing quality.

Benefits of Vaillant Combi Boilers

Vaillant combi boilers stand out in the market for their streamlined design and exceptional energy efficiency. These boilers are engineered to meet the demands of modern homes while also providing cost savings.

Efficiency and Energy Savings

Vaillant combi boilers are renowned for their energy efficiency, an essential characteristic for contemporary households striving to reduce their carbon footprint. They operate with an efficiency rating of at least 92%, in adherence to the Boiler Plus regulations. As a result, homeowners may experience significant savings on heating bills, with potential annual reductions of up to £800 when switching from conventional boilers.

  • Annual savings: Up to £800

  • Efficiency rating: Minimum of 92%

Compact Size and Installation

A key advantage of Vaillant combi boilers is their compact size. They are designed to fit snugly into small spaces, eliminating the necessity for additional cold water tanks or hot water cylinders. This streamlined installation not only saves space but also reduces installation complexity, leading to potential cost savings on the setup.

  • No cold water tank needed

  • Reduced installation complexity

Reliability and Performance

Longevity and consistent operation are at the core of Vaillant's reputation for reliability and performance. These boilers are expected to have a robust service life of 10-15 years, provided they are well-maintained with annual servicing by a qualified technician. Vaillant's dedication to reliability ensures that homeowners benefit from a dependable source of heating and hot water.

  • Life expectancy: 10-15 years with proper maintenance

  • Annual servicing: Required for optimal performance

Awards and Recognition

Vaillant has garnered awards and recognition from within the industry, a testament to the brand's commitment to quality and sustainability. These accolades reflect the company's pursuit of excellence and confirm their position as a leading manufacturer of efficient and sustainable heating solutions.

  • Industry awards: Reflecting commitment to excellence

  • Sustainability: A core company value

Cost Analysis of Vaillant Combi Boilers

The cost of Vaillant combi boilers intertwines initial purchase prices with installation and ongoing expenses. Homeowners seeking new boilers will find this analysis useful for budgeting and long-term planning.

Initial Purchase Price

Vaillant combi boiler prices span from approximately £907 for entry-level models to around £1,920 for high-end units. These costs variably account for boiler size and capacity, typically correlated with kilowatt (kW) output, catering to diverse household demands.

  • Entry-Level Boilers: £907 - £1,200

  • Mid-Range Boilers: £1,200 - £1,650

  • High-End Boilers: £1,650 - £1,920

These prices reflect the boiler alone, excluding additional aspects such as accessories or extended warranties.

Installation Costs

Installation costs for Vaillant combi boilers diverge according to complexity and region. On average, daily labour rates range from £500 to £1,500, with straightforward like-for-like replacements costing roughly £2,400. Conversely, converting from a system boiler to a combi can escalate to £3,000 or beyond.

  • Labour Cost (per day): £500 - £1,500

  • Like-for-Like Replacement: ~£2,400

  • System to Combi Conversion: ~£3,000+

Operation and Maintenance Expenses

Beyond the initial outlay, homeowners must contemplate running costs and upkeep. Fuel efficiency plays a pivotal role in monthly energy bills, with Vaillant combi boilers exhibiting commendable energy efficiency ratings. Regular maintenance is paramount to sustain optimal performance, with costs varying based on local service prices and contract terms.

  • Energy Bills: Influenced by boiler efficiency and usage

  • Regular Maintenance: Prices subject to local rates and services contracts

Investing in a new Vaillant combi boiler entails a thorough understanding of up-front and ongoing financial commitments. One must factor in the cost of the boiler itself, the intricacies of its installation and the continuous expenses tied to its operation.

Choosing the Right Vaillant Boiler

Selecting the appropriate Vaillant boiler for your home requires a careful evaluation of your hot water and heating requirements. The choices available can cater to different household needs and preferences, so understanding these factors is key to making an informed decision.

Assessing Hot Water Demand

The most popular type of boiler in the UK is the combi boiler, a high-efficiency unit that provides hot water on demand without the need for a separate hot water cylinder. When considering a Vaillant combi boiler, it's essential to evaluate your home's hot water usage. Determine the number of bathrooms and the frequency of simultaneous hot water use. If your home has multiple bathrooms being used at the same time, you'll require a boiler with a higher kilowatt (kW) output to meet the increased demand.

Vaillant combi boiler models are available in a range of sizes, commonly from 25 to 43kW. For example, a smaller property with one bathroom may find the 25kW model sufficient, whereas homes with more extensive hot water needs might opt for the higher kW models.

Considering Your Home’s Heating Needs

When selecting the size of the boiler, one must also consider the heating needs of the home. The general guidance is to match the boiler's power output with your space heating requirements. A professional heating engineer can assess the size and insulation quality of the property to determine the necessary kW output.

Type of boiler: For smaller homes and flats with one bathroom and low water demands, a lower kW combi boiler may suffice. Larger properties might be better served by a higher kW unit or even a different type of Vaillant system if the demand for hot water is significant enough to justify a separate hot water cylinder.

In summary, the right Vaillant combi boiler for your home should align with both your hot water demand and heating requirements, ensuring efficient and reliable operation.

Installation and Professional Services

Installing a Vaillant combi boiler involves a blend of precision and expertise. Homeowners must seek professionals who are not only proficient in boiler installations but also compliant with legal safety standards.

Finding a Vaillant Advance Installer

Vaillant Advance Installers are engineers trained and certified by Vaillant to install their boilers. A homeowner can locate these installers through Vaillant's official website where a dedicated database allows for easy searching by postcode. Choosing a Vaillant Advance Installer ensures:

  • Professional assessment of the household's heating requirements

  • Assurance of high-quality installation aligned with the manufacturer’s standards

The Importance of Gas Safe Registration

Any individual entrusted with the installation of a Vaillant combi boiler must be Gas Safe registered. This registration is a legal requirement in the UK and serves as a testament to the engineer's proficiency in safely handling gas appliances. The key reasons for this prerequisite include:

  • It reduces the risk of unsafe installations which could lead to gas leaks, fires, and even explosions.

  • It provides peace of mind to homeowners knowing that the installer is up-to-date with current safety protocols.

Installers should present their Gas Safe Register ID card upon request. Homeowners should confirm the engineer's credentials before any work commences.

Running Costs and Savings

When considering a Vaillant combi boiler, it's important to factor in not just the initial purchase price but also the implications for ongoing energy expenses. The United Kingdom's focus on reducing carbon emissions has a direct impact on how heating systems operate and the potential savings for homeowners.

Reducing Energy Bills

Vaillant combi boilers are designed to be energy efficient, directly contributing to lower energy bills. Smart home integration allows for precise control over heating, ensuring that energy is not wasted. The advanced technology adopted by Vaillant aims to save money on utilities in the long term. Moreover, the UK government has been implementing measures to encourage energy efficiency, which can lead to further reducing bills through possible incentives or tax relief.

It's clear that while the initial investment may be significant, the potential to reduce bills over time is a tangible benefit of these modern systems. Accurate estimation of energy consumption, in conjunction with a tailored approach to each home's needs, ensures the Vaillant combi boiler is a cost-effective choice.

Long-Term Value and Warranty

Vaillant combi boilers are synonymous with durability and comprehensive service support, offering long-term value and a trustworthy guarantee for customer satisfaction.

The Durability of Vaillant Boilers

Vaillant boilers are engineered with a focus on quality control, ensuring they last longer than many competitors. Their commitment to reliability is evident in the materials they use and their boilers' design. Not only does this quality build contribute to their longevity, it also ensures that the customers receive value for money, with reduced likelihood of repairs and replacements over time.

Guarantee and Service Support

Vaillant's warranty policies demonstrate the company's trust in their products. For example, the ecoFIT Pure range comes with a standard 7-year guarantee, which can be extended up to 10 years if the installation is carried out by a Vaillant Advance Installer. This commitment to service doesn't end with the warranty; Vaillant also requires an annual service by a Gas Safe Registered engineer to preserve the guarantee's validity.

  • Guarantee Registration: Customers can easily register their appliance through the myVAILLANT Web Portal for warranty purposes.

  • Service History: The portal allows tracking and managing of a boiler's service history, optimising customer satisfaction and ensuring longevity.

  • Annual Servicing: While not included in the warranty, servicing is crucial and details must be recorded in the Benchmark logbook for guarantee purposes.

By uniting solid product reliability with supportive warranty terms, Vaillant demonstrates a commitment to both product excellence and customer satisfaction.

Why Vaillant? A Summary of Brand Advantages

Vaillant combi boilers have carved out a robust reputation for both efficiency and reliability, garnering positive reviews from numerous homeowners. Known for integrating cutting-edge technology, these boilers are designed to provide direct access to heating and hot water, eliminating the need for extra tanks or cylinders. Additionally, Vaillant's offerings contribute significantly to household energy efficiency, which can lead to reduced energy bills over time.

  • Customer Satisfaction: Vaillant stands out with strong homeowner approval. A consistent pattern of recommendations underlines the brand's credibility in the market.

  • Professional Endorsement: Expert engineers often share a favourable opinion of Vaillant, echoing the trust customers place in the brand.

Vaillant's standing stems from not merely selling heating solutions but also ensuring long-term value through their products' performance. Despite the possibility of higher initial costs, the inherent efficiency of these systems can translate into long-term savings. This aspect is particularly critical as energy costs continue to be a concern for many households.

Lastly, in terms of reliability, Vaillant boilers display commendable fault rates, which signifies fewer disruptions and a testament to the brand's promise of quality. Their engineer's expertise further instils confidence, knowing that installation and maintenance are handled by skilful professionals.

Whether it's a seasoned homeowner or someone exploring heating options for the first time, Vaillant's fusion of efficiency, reliability, and professional backing make it a noteworthy contender in the boiler industry.

Making the Decision

Selecting a boiler is a significant investment for any homeowner. It is essential to compare Vaillant combi boilers with other leading brands to ensure a decision that balances cost-effectiveness with long-term reliability.

Comparing with Competitors

When assessing Vaillant combi boilers, potential buyers must weigh them against alternatives from manufacturers such as Baxi, Ideal, Worcester Bosch, and Viessmann. Prices fluctuate broadly; for instance, a Baxi combi-boiler may be found within the £568 - £1,200 range, whereas Worcester Bosch models span from £750 to £2,000. Vaillant models settle within a competitive bracket, often costing between £796 - £1,400.

Variations in price can reflect differences in warranty length, after-sales support, and boiler efficiency. Many buyers find that finance options are available from manufacturers, easing the upfront financial pressure. Furthermore, it's wise to consult with local engineers who can provide bespoke quotes and advice tailored to your specific needs. The incorporation of expert local knowledge ensures that the chosen boiler is suitable for the property's heating requirements and that installation is feasible.

Boiler brands extend their offerings to different price tiers, catering to a spectrum of budgets. High-end models may also be an option, boasting advanced features and extended durability, but for a premium. The decision should be informed by a careful analysis of both initial costs and longer-term considerations such as energy efficiency, which can affect ongoing utility expenses.

Accessories and Additional Considerations

Installing a Vaillant combi boiler is an investment in efficient home heating. Buyers should consider not only initial purchase costs but also the long-term benefits provided by compatible add-ons and the availability of specific spare parts.

Compatible Add-Ons and Spare Parts

Purchasing a Vaillant combi boiler often involves considering a wide range of compatible accessories designed to enhance functionality. For longevity and optimal performance, it's prudent to use genuine spare parts available directly from the manufacturer. These range from simple sealants and gaskets to more sophisticated sensors and controls. As these components are designed to fit precisely, they ensure the boiler operates as efficiently as possible, minimising the risk of malfunctions.

Heat Exchangers and Heat Pumps

Vaillant combi boilers encompass advanced heat exchangers, integral in achieving heightened energy efficiency. Heat exchangers play a pivotal role; they facilitate the transfer of heat without mixing different fluids. Moreover, the integration of heat pumps into a boiler system can substantially elevate a household's energy efficiency. These pumps extract warmth from the air, ground, or water, thus requiring less gas to heat a home.

  • Heat Exchangers: Enable efficient heat transfer and system optimisation.

  • Heat Pumps: Serve as an eco-friendly method to augment heating systems.

By thoughtfully selecting add-ons and maintaining the system with quality parts, homeowners can ensure their Vaillant boiler remains a dependable source of warmth and hot water for many years.

After-Sales and Customer Support

Navigating the complexities of after-sales service and customer support can significantly influence customer satisfaction. Vaillant has tailored its customer care to ensure that the investment in their combi boilers is protected by a reliable service framework.

Regular Boiler Services

Regular boiler services are a critical aspect of maintaining a Vaillant combi boiler's efficiency and longevity. Vaillant provides annual services to inspect and repair any issues that might arise, ensuring the boiler operates at optimum levels. The price for these services can vary, but customers can anticipate costs that align with the industry's average.

Furthermore, the focus on customer support includes access to troubleshooting tips and online assistance. Vaillant's after-sales service aims to repair any malfunctions up to a value of £1,500, demonstrating their commitment to customer satisfaction post-purchase.

Boiler servicing is not merely an operational necessity—it is also a safety imperative. Regular checks are essential for detecting any potential gas leaks or hazardous faults. Vaillant's dedication to customer care assures homeowners that their boilers will receive the necessary attention to maintain safe operation throughout the year.

Final Thoughts

In assessing the landscape for 2024, Vaillant remains a prominent figure for UK households seeking instant hot water through combi boilers. Installation charges, a notable aspect of overall cost, typically range from £500 to £1,500 per day. It is crucial for consumers to encompass these fees within their financial planning.

The combi boiler cost reflects advancements both in energy efficiency and smart home capabilities. Such innovations invariably affect price, mandating that purchasers factor in the potential for an augmented initial outlay against long-term savings. Price tags for Vaillant models are expected to oscillate between £875 and £1,800, barring installation.

Vaillant’s offerings dovetail with an eco-conscious market, with an ever-increasing inclination towards sustainable living. Consequently, their boilers not only deliver on the front of immediate access to heating and hot water but also stride towards reducing household carbon footprints.

Consumers must judiciously analyse both the upfront cost and the operational benefits. This is a nuanced decision where the merits of energy efficiency and integration into smart homes potentially offset higher purchase prices. In conclusion, a Vaillant combi boiler represents a significant investment that warrants comprehensive contemplation.

iHeat New Boiler Costs

Boilers can be a daunting purchase for many people as they’re an appliance with a lot of responsibility, providing heat for you and your family is something you want to get right. Boilers aren’t exactly a quickly disposable item either, potentially lasting you a decade.

Effectively, new boiler cost can be split into two segments: the first is the actual boiler itself (unit price), and the second is the cost of the boiler being installed (set up) in your property by an expert engineer. 

Here at iHeat, we want to remove all of this undue stress and make the decision making process of upgrading to a new central heating system, as easy as possible.

Boiler costs can vary depending on a number of factors including their brand, model, fuel, output, warranty, labour and installation type. Typically a new boiler will cost between £1,845 and £3,500, below is a list of average boiler installations offered by iHeat (guide only).

Installation Type

Price (inc VAT)

Combi to combi swap


Get a quote

System to combi conversion


Get a quote

New boiler install


Get a quote

Back boiler to a combi


Get a quote

System to system


Get a quote

Frequently Asked Questions

How much does a new Vaillant combi boiler cost?

Prices for new Vaillant combi boilers range from approximately £875 to £1,800. These costs vary depending on the power supply, which typically lies between 25 to 43kW.

Is Vaillant a good boiler combi?

Vaillant is reputed for manufacturing reliable and efficient combi boiler systems. Their products often integrate the latest technological advancements, meeting modern energy efficiency standards.

Are Vaillant boilers economical?

Yes, Vaillant boilers are designed for energy efficiency, which can lead to reduced energy bills. Innovations in smart home technology further enhance the economy of the latest models.

Should I leave my Vaillant boiler on all the time?

Keeping a Vaillant boiler on continuously is not usually recommended. Optimal settings depend on individual heating needs and may benefit from a programmable thermostat for efficiency.

How much does it cost to install a Vaillant combi boiler?

Including the unit's price, labour fees for installing a Vaillant combi boiler typically fall between £500 to £1,500 per day. Consequently, the total cost is estimated at £1,350 to £3,300.

How long do Vaillant combi boilers last?

A Vaillant combi boiler generally has a lifespan of 10 to 15 years. Routine maintenance can prolong the boiler's service life and ensure it performs optimally.

What temperature should a Vaillant combi boiler be set at?

A Vaillant combi boiler should be set to a temperature fitting the homeowner's comfort level and seasonal requirements. An average setting is around 18°C to 21°C for heating and 60°C for hot water.

Stephen Day profile photo
Article by
Stephen Day | Co-founder
Gas Safe registered and FGAS certified engineer with over 20 years experience in the heating and cooling industry.