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Last updated: 10th March, 2024


Vaillant Boilers Reviews

Vaillant Boilers Reviews

Key takeaways

  • Vaillant offers a versatile range of energy-efficient boilers.
  • The brand is noted for high consumer satisfaction and recommendations.
  • Vaillant boilers blend quality engineering with cost-effectiveness.

Vaillant offers an extensive selection of boilers to cater to different household requirements, including combi, system, and regular boilers.

Vaillant has established itself as a prominent brand in the heating industry, consistently delivering boilers that emphasise performance, efficiency, and reliability. In 2024, the Vaillant boilers range continued this tradition, presenting a selection of systems designed to meet the diverse needs of UK households.

With options that cover combi, system, and regular boilers, Vaillant caters to a wide array of heating and hot water demands, making them a go-to choice for many consumers seeking new or replacement boilers.

The 2024 lineup of Vaillant boilers includes the ecoTEC and ecoFIT series, which are known for their energy efficiency, often aligning with Energy-related Products (ErP) ratings of 'A'. This range provides homeowners with the potential to reduce their gas bills while maintaining a high level of comfort. 

Alongside performance, the brand has been recognised for its impressive customer satisfaction rates, with a significant number of users willing to recommend Vaillant to others. The brand's focus on engineering boilers that conform to high safety standards while ensuring straightforward installation, has further solidified its standing in the boiler market.

Vaillant's commitment to supplying quality heating solutions is further demonstrated by the positive reviews from both users and professional engineers. With their boilers offering a balance between upfront costs and long-term savings, they represent a smart choice for those who prioritise performance and sustainability.

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Overview of Vaillant Boilers in depth 2024

In 2024, Vaillant continues to harness innovative technologies, integrating smart home features and focusing on energy efficiency across its boiler ranges. The latest models, including the ecoTEC Plus, the ecoTEC exclusive with Green iQ, ecoFIT pure, and the ecoTEC Pro, are designed to meet varying household demands.

Boiler Types and Models Comparison

Vaillant offers an extensive selection of boilers to cater to different household requirements, including combi, system, and regular boilers. Each type targets a specific heating and hot water delivery method, providing a solution for homes of all sizes and heating needs. Vaillant's 2024 range exemplifies the brand's commitment to efficient and reliable heating.

  • Combi boilers: These provide central heating and instant hot water without the need for a separate water tank.

  • System boilers: These require a cylinder for storing hot water but don't need a tank in the loft, making them more suitable for homes with multiple bathrooms.

  • Regular boilers: Also known as conventional boilers, these are more traditional and work with a cold water tank and hot water cylinder.

Vaillant combi boiler range: models and key features

  • ecoTEC Pro: Available in outputs of 24kW, 28kW, and 30kW, these models are compact and efficient, ideal for small to medium-sized properties with lower hot water demands.

  • ecoTEC Plus: Ranging from 25kW to 38kW, the ecoTEC Plus models can serve larger homes and feature quiet operation and high efficiency.

Key features across the combi range often include stainless steel heat exchangers, user-friendly controls, and compatibility with the Vaillant vSMART™ control for smart heating management.

Vaillant System Boiler range: models and key features

  • ecoTEC Plus: Models like the ecoTEC plus 637 system boiler provide high output and are suitable for busier households with greater heating needs, capable of operating at 16% of maximum power when less heat is required.

  • ecoTEC exclusive with Green iQ: Known for its high-end efficiency and adaptability, this range is built with eco-friendly operation in mind.

Vaillant's system boilers are designed for performance and sustainability, incorporating features like modulating pumps for reduced energy use.

Vaillant heat only regular boiler range: models and key features

  • ecoTEC Plus: This range of regular boilers includes various outputs to suit different home sizes, and the models are compatible with solar thermal systems for an eco-friendly boost.

  • ecoFIT pure: These regular boilers are compact, making them ideal for homes with limited space, without compromising on power and efficiency.

The regular boiler range from Vaillant offers a practical solution for those who prefer a traditional form of heating and hot water supply, reinforced with modern efficiencies.

Exploring Vaillant boilers EcoTec and EcoFit

Vaillant's EcoTec and EcoFit ranges stand out with their focus on heating efficiency, advanced technological features, and their commitment to energy sustainability. These modern heating solutions meet diverse household needs, from sizeable domestic environments to more compact spaces, with a variety of output options and designs tailored to enhance user control and comfort.

Heating Efficiency and Output

EcoTec boilers are available in multiple outputs, ranging from the compact 12kW to a robust 35kW, catering to a vast span of hot water demands and heating requirements. The EcoFit Pure combi responds deftly to smaller spaces that require efficient heating without compromising performance. For homes with higher demands, the Vaillant system and regular boilers integrate seamlessly with hot water cylinders, maintaining consistent water pressure even in multi-bathroom homes.

Vaillant's Unique Technologies

Innovation shines in Vaillant's boilers with their advanced technologies, such as the patented Advance and precision-engineered pressure sensors, which ensure optimal performance and reliability. Notably, the EcoTec line's use of a condensing boiler technology plays a significant role in reducing carbon emissions, reinforcing Vaillant's commitment to sustainability.

Hot Water Performance

These boilers excel in providing rapid heating and hot water responses. The EcoTec Plus combi and system boilers include models designed for high hot water comfort, with the combination versions efficiently heating water on demand. Meanwhile, the EcoTec Exclusive with Green iQ utilises renewable energy sources, aligning with sustainable living practices.

Design and Installation Considerations

Vaillant's boilers are engineered with a focus on facilitating seamless installation processes. The EcoTec Plus is compact and lightweight, an advantage for engineers, especially when fitting boilers within confined kitchen cupboards. Gas Safe registered heating engineers can handle the boiler installation, where installation costs can vary according to the complexity of the job.

Control and Usability

User experience is bolstered by features like push-button programming for intuitive operation. Vaillant boilers offer user-friendly interfaces and features such as modulating pumps for energy costs savings, and thermostats that maintain desired temperatures with accuracy, contributing to fuel efficiency and reduced energy bills.

Energy Efficiency Ratings

Vaillant has made significant strides in offering boilers with impressive energy efficiency ratings. Models from the EcoTec and EcoFit series are designed to exceed UK standards, often achieving an A-rating for energy efficiency, which translates into lower carbon footprints and adherence to environmental guidelines for sustainability.

Installation and Costs

Selecting the right Vaillant boiler and understanding the associated installation and costs implications are key decisions for homeowners. Vaillant's range for 2024 focuses on energy efficiency and reliability, with installation by Gas Safe registered engineers to ensure safety and optimal performance.

Professional Installation Process

Trusted installers are paramount to the safe and reliable operation of a Vaillant boiler. These heating engineers must be Gas Safe registered, which is a legal requirement in the UK. The installation process includes a comprehensive assessment, tailored recommendations, and meticulous fitting. A Vaillant system boiler or combi boiler demands a thorough understanding of your home's heating requirements, ensuring the boiler's capacity aligns with your needs.

Cost Analysis

The cost for a new Vaillant boiler installation varies depending on the model and complexity of the system. Combi boiler prices typically range from £1,000 to £3,000, whereas system boiler prices can be slightly higher due to additional components like a separate cylinder. It’s not just the boiler costs; installation fees must also be considered, as they can significantly affect the overall price. These fees can range based on the individual circumstances and the extent of work required.

  • Vaillant Combi Boiler Prices: Approx. £1,000 - £3,000

  • Vaillant System Boiler Prices: Approx. £1,100 - £3,500

  • Installation Costs: Varies (depends on system complexity)

Financing and Savings

Vaillant offers various financing options, helping homeowners manage the cost of a new boiler and installation. Potential savings on energy bills are a compelling aspect of purchasing a high-efficiency Vaillant boiler. The brand’s focus on low-emission combustion technology not only reduces the environmental footprint but can also contribute to lower fuel usage and a subsequent decrease in monthly outgoings. Homeowners should seek detailed quotes from several installers to find the most cost-effective solution for their specific circumstances, keeping potential savings at the forefront of their decision-making.

  • Finance Options: Available from Vaillant or third-party providers

  • Energy Bill Savings: Potential reduction due to high-efficiency models

Performance and Reliability

Assessing the Vaillant boilers' 2024 range shines a spotlight on the key aspects of performance and reliability. It scrutinises not only the boilers' ability to perform under various conditions but also their enduring dependability over time.

Heating Efficiency

The 2024 Vaillant boilers exhibit impressive heating efficiency, a crucial characteristic considering the rise in energy bills. With eco-friendly models like the ecoFIT Pure, efficiency is tailored to reduce fuel consumption while providing consistent warmth. These units are designed with a compact size and quiet operation, embodying energy-saving qualities without compromising on heat distribution.

  • Energy Efficiency Rating: Predominantly A-rated

  • Features: High-efficiency pumps, modulating heat exchangers

  • Impact: Lowered energy consumption, reduced carbon footprint

Reliability Assessments

Vaillant's commitment to reliability is corroborated through numerous customer reviews and reliability assessments. As a German brand with a long-standing history, it is not surprising that they have moulded their reputation for dependability. Consumer surveys and independent reviews often place Vaillant in the upper echelons of trustworthiness, an attribute that doesn't wane over years of service.

  • Trusted Trader Endorsements: High levels of satisfaction

  • Customer Satisfaction: Positive feedback on durability and operation

Warranty and Support Services

Vaillant boilers come with solid warranty options, demonstrating the manufacturer's confidence in their products. Comprehensive support services further assure customers of assistance for repairs and servicing, with a network of trained professionals ready to offer help. Availability of spare parts and a straightforward servicing matrix underline their customer service commitment.

  • Warranty Duration: Ranging up to 10 years

  • Customer Service Channels: Multiple, including dedicated helplines

Comparative Analysis with Competitors

In comparison to other prominent manufacturers like Ideal, Viessmann, and Worcester Bosch, Vaillant stands strong. Each brand presents its own set of strengths, but Vaillant's ecoFIT Pure and other models hold their own in terms of energy efficiency and reliability. The best boiler for an individual might vary based on specific needs, but Vaillant typically competes well in terms of efficiency ratings and customer loyalty.

  • Viessmann: Similar warranty periods and noted for reliable combi boilers

  • Worcester Bosch: Often praised in customer reviews, competitive on reliability

  • Ideal: Known for their comprehensive range catering to various consumer needs

Through the lens of these specific considerate analyses, the Vaillant boiler range for 2024 delineates itself as a robust and efficient option for homeowners, balancing upfront costs with long-term savings on energy bills.

Safety and Engineering Standards

Vaillant boilers, revered for their German engineering prowess, embody robust safety protocols across their product range, aptly reflecting their longstanding industry presence. Gas boilers, a substantial segment of Vaillant's offerings, adhere to rigorous UK and EU safety legislation. Vaillant prioritises not just functionality but also the well-being of its users by incorporating fail-safes and preventative measures.

  • Automatic Shutdown: Should any operational anomalies arise, Vaillant gas boilers are equipped to automatically terminate their operation, thus forestalling potential hazards.

  • Pressure Release Valves: By including pressure release components, these boilers maintain a safe operating pressure which is crucial to circumvent any undue stress on the system.

Their heat only boilers have been methodically tested to ensure they operate safely under all foreseeable conditions. Vaillant invests ample resources in the ongoing enhancement of their product safety, setting benchmarks for the industry as a whole.

  • Durability of Materials: Vaillant employs high-grade materials engineered for resilience and longevity, reducing the likelihood of leaks or structural weaknesses that could compromise safety.

  • Regular Assessments: Through frequent evaluations, both by in-house experts and independent bodies, they assure that each series of boilers maintains the highest possible safety and engineering standards.

It's this integration of meticulous design, stringent testing, and proactive safety measures that fortifies the reputation of Vaillant’s gas and heat only boilers. Each unit's intricate assembly balances complexity and precision, consistently exceeding users' expectations while remaining compliant with strict safety regulations.

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


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System to combi conversion


Get a quote

New boiler install


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Back boiler to a combi


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System to system


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Frequently Asked Questions

Is a Vaillant boiler any good?

Vaillant boilers are generally highly regarded for their customer satisfaction levels and their range of models suited to various household requirements. The brand is known for balancing quality with cost, offering boilers within a price bracket appropriate for many budgets.

Are Vaillant boilers reliable?

With a strong reputation in the market, Vaillant is noted for the dependability of its boilers. The boilers' real fault rates are competitive, reflecting the company's emphasis on manufacturing durability and reliability.

What is the difference between Worcester and Vaillant boiler?

While both brands offer a range of high-quality options, the main differences lie in their company histories, specific technological innovations, and pricing strategies. Each brand has its own set of features that may appeal differently to consumers based on individual household needs.

How many years does a Vaillant boiler last?

Vaillant boilers are designed for long-term use. With proper maintenance and servicing, a Vaillant boiler can be expected to last upwards of 15 years, ensuring sustained performance throughout its lifespan.

How do I fix low pressure on my Vaillant boiler?

To remedy low pressure in a Vaillant boiler, users can usually repressurise the system by following the manufacturer's guidelines. This typically involves adjusting the filling loop valves until the pressure gauge reflects the recommended settings.

Why does my Vaillant boiler keep losing pressure?

Persistent loss of pressure in a Vaillant boiler can indicate issues such as leaks in the system, recently bled radiators, or a malfunctioning pressure relief valve. It may be necessary to consult a certified engineer for a thorough diagnosis and resolution.

What is wrong with my Vaillant boiler?

If a Vaillant boiler is experiencing issues, the cause could range from simple to complex. Common problems include ignition faults, thermostat issues, or pressure irregularities. Professional assessment is advised to identify the specific fault and determine the appropriate fix.

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.