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Last updated: 30th August, 2023


Quietest Boiler Brands

Quietest Boiler Brands

Key takeaways

  • The choice of a quiet and efficient boiler is important for a peaceful living environment.
  • The Quiet Mark award helps to identify boilers designed for minimal noise levels.
  • Top quiet brands include Viessmann, Worcester Bosch, Ideal, and Vaillant, offering a range of options concerning efficiency, performance and features.

Want to find the quietest boiler brand for your home? Our guide compares the top-rated boilers from Consumer Reports, Quiet Mark, and Heating Help to help you find the perfect boiler that operates quietly and efficiently.

The world of boilers can be a daunting one, especially when searching for a model that aligns with your specific needs. For homeowners who value peace, tranquillity, and energy efficiency, it is essential to choose the quietest and most effective boiler brand available.

Today's advanced boilers have incorporated noise-reduction technologies, providing not only a comfortable living environment but also contributing to overall efficiency and performance.

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Understanding the bold claims made by boiler manufacturers can help you make an informed decision. The Quiet Mark award is one indicator of a boiler's noise levels; products with this distinction are designed to operate with minimal disturbance.

Top quiet boiler brands include Viessmann, Worcester Bosch, Ideal, Vaillant, and others, each offering unique features concerning efficiency, performance, installation, and maintenance.

Understanding Boilers

Boilers are essential appliances in many homes and businesses, providing heating and hot water. There are several types of boilers, including combi, system, and regular boilers. Each type operates differently and has its own set of advantages and drawbacks.

A combi boiler, short for combination boiler, is a type of boiler that combines central heating and a hot water heater into one unit. These are popular due to their compact size, efficiency, and ability to deliver hot water on demand. Combi boilers are typically powered by gas, although oil and LPG options are also available.

System boilers, on the other hand, are connected to a separate hot water storage cylinder. They provide central heating and hot water by pumping heated water from the boiler to the cylinder, where it is then stored to be used when needed. System boilers can run on gas, oil, or LPG, and they offer more flexibility in terms of hot water demand than combi boilers.

Regular boilers, also known as heat-only or traditional boilers, work in conjunction with a hot water cylinder and often a cold water storage tank. They heat the stored water in the cylinder, providing hot water and central heating. Regular boilers are often found in older properties and can be powered by gas, oil, or LPG.

A more recent development in boiler technology is the condensing boiler. These boilers are designed to capture and reuse heat that would otherwise be lost through the flue, making them more energy-efficient than non-condensing boilers. Condensing boilers can be found in various configurations, such as combi, system, or regular models.

Heat exchangers play a vital role in the operation of boilers. They transfer heat from the fuel source (such as gas, oil, or LPG) to the water, which then circulates throughout the property via a central heating system. The type of heat exchanger used depends on the particular boiler model and its fuel type.

Heat pumps, while not a type of boiler, can also be used to provide central heating and hot water. They operate by extracting heat from the outside air or ground and using it to heat the water in the property. Heat pumps are an environmentally friendly alternative to traditional boiler systems, as they utilise renewable energy sources and produce fewer carbon emissions.

Regardless of the type, maintaining and servicing your boiler regularly is essential for efficient operation, safety, and prolonging its lifespan. Whether you have a gas, oil, or LPG-powered boiler, it's vital to ensure it's in good working order and adheres to all relevant safety standards.

The Importance of a Quiet Boiler

A quiet boiler can make a world of difference in the comfort and wellbeing of your home. It's not just about the peace and tranquillity that comes with reduced noise emissions; it's also about the efficiency and performance of the appliance. As such, investing in one of the quietest boilers is proving to be an increasingly popular choice among homeowners.

First, let's take a look at the decibel scale, which helps us measure the level of noise emitted by a boiler. Decibels, or dB, give you a quantitative way to compare the relative loudness of various appliances. For example, a typical conversation is rated around 60 dB, while the sound of birdsong is around 40 dB. Boilers can emit a range of noises including gurgling, whistling or clanking - but the quietest models hardly make any noise at all.

With quiet combi boilers, noise emissions are significantly lower. The European ErP decibel rating system allows homeowners to easily compare and select the quietest and most efficient boilers. Many boilers nowadays are awarded the Quiet Mark, a certification which assures consumers that a product is among the most noise-friendly in its category. Sporting the distinctive purple Q logo, the Quiet Mark certification indicates a high-quality, pleasant-sounding boiler that meets stringent requirements for noise reduction and acoustic properties.

There are many reasons why investing in a quiet boiler is crucial for homeowners:

  • Comfort: Quieter boilers make it more pleasant to live in a home, as inhabitants can carry on with regular activities without having to listen to constant hums or gurgling noises.

  • Concentration: Noise from a boiler can be distracting and make it difficult to focus, whether it's for work, study, or relaxation. Quieter combi boilers contribute to a more conducive and productive environment.

  • Sleep: Unwanted boiler noise can interfere with your quality of sleep, while a quiet boiler won't disturb your rest or that of your family.

  • Energy Efficiency: Generally, quieter boilers also tend to be more energy-efficient. Investing in a quiet boiler can help reduce your energy bills, decrease your carbon footprint, and save money in the long run.

Several leading boiler brands offer models with remarkably low decibel ratings. For instance, the Viessmann Vitodens 200 is recognised as one of the quietest condensing combi boilers available, with a noise emission of just 36 dB – quieter than most refrigerators.

To sum up, a quiet boiler impacts various aspects of daily life, from sleep quality to productivity. Alongside its noise reduction benefits, opting for a quiet combi boiler often translates to improved energy efficiency and cost savings. Ultimately, considering the importance of a quiet boiler is a wise choice for homeowners looking for long-term comfort and rewards.

Quiet Mark Award

Quiet Mark, a globally recognised accreditation, is an invaluable resource for identifying the quietest appliances and products available on the market. This award plays a significant role in helping homeowners select the ideal boiler brand and model, ensuring a peaceful home environment. Several boiler brands have achieved this prestigious certification for their low sound levels and high-quality performance.

Notably, Vaillant, a widely respected boiler manufacturer, has had 29 of its boilers certified by Quiet Mark. Amongst its popular models, the ecoFIT Pure and ecoTEC Exclusive Green iQ have been recognised for their exceptionally low noise levels. Appreciably, Vaillant's continued dedication to creating quiet boilers has earned them a prominent position in the industry.

Another boiler brand that has received the Quiet Mark certification is Glow-worm Energy. Its impressive range of products, including the Ideal Logic Max and Plus, are specifically designed to provide exceptionally quiet performance. These boilers stand out among their competitors and have garnered a loyal customer base.

Furthermore, heat pumps, a crucial component of contemporary heating systems, are also assessed and certified by Quiet Mark. Approximately 375 heat pump models undergo evaluation each year, and at present, 18 Vaillant heat pumps have scored the prestigious recognition. In addition, the Grant Aerona³ R32 Air Source, Warmflow Zeno, and Vaillant aroTHERM Plus heat pumps have been acknowledged for their low decibel levels and efficiency.

In conclusion, the Quiet Mark award is a credible benchmark for identifying the quietest boiler brands, ensuring both efficiency and tranquillity in homes. By opting for boilers and heat pumps that have received this certification, homeowners can confidently invest in a product that meets their requirements for a peaceful living environment.

Top Quiet Boiler Brands

When it comes to quiet boilers, there are several brands that stand out with their innovative technology and commitment to providing customers with efficient and silent heating systems. Here are some of the best quiet boiler brands in the market:

Viessmann is a well-respected boiler manufacturer known for its cutting-edge technology. One of their most popular models, the Viessmann Vitodens 200, is exceptionally quiet, with a noise emission of just 36dB. This highly efficient combi boiler performs at an impressive efficiency level of 98% and offers a central heating output of 27.8 kW, alongside a domestic hot water output of 30.5 kW.

Another leading boiler brand on the market is Worcester Bosch. Their Greenstar series of boilers has earned a reputation for being not only energy-efficient but also exceptionally quiet. These boilers have been designed to reduce noise emissions, making them a great option for homeowners looking for a silent and efficient heating system.

Ideal, another notable boiler manufacturer, offers the Logic Max series, which has also been awarded a Quiet Mark. Ideal Logic Max boilers are well-known for their energy efficiency and silent operation, making them a popular choice among homeowners seeking quiet and cost-effective heating solutions.

The Glow-worm Energy series is another example of boilers that have been granted a Quiet Mark for their hushed operation. This range of boilers is applauded for its energy efficiency and silent functionality, ensuring homeowners can enjoy a peaceful and comfortable environment.

Lastly, Vaillant is a renowned boiler brand, with their ecoTEC Plus series being a popular choice among those seeking a quiet heating system. Vaillant ecoTEC Plus boilers offer energy efficiency and a reduced noise output, making them a practical option for homeowners prioritising noise reduction and energy savings.

In summary, these top boiler brands - Viessmann, Worcester Bosch, Ideal, Glow-worm Energy, and Vaillant - provide an excellent array of quiet, energy-efficient heating solutions for homeowners. When selecting a boiler from one of these esteemed brands, customers can be confident in their choice of a low-noise and highly efficient heating system.

Efficiency and Performance

When selecting a boiler, efficiency and performance are two vital factors to consider. A highly efficient boiler can significantly reduce energy bills and lessen environmental impact. Efficiency ratings help consumers make an informed decision, with each boiler being graded on its ability to convert fuel into heat.

One brand that boasts quiet operation and high efficiency is Viessmann. Their Vitodens 200 model, a combi boiler, achieves an impressive efficiency level of 98%, with a noise emission of only 36dB—lower than most refrigerators. With a central heating output of 27.8 kW and a domestic hot water output of 30.5 kW, the Vitodens 200 is a top contender in terms of efficiency and performance.

In addition to efficiency ratings, the modulation ratio is an essential aspect to consider when assessing a boiler's performance. A higher modulation range correlates with a more efficient operation and reduced wear and tear, ultimately prolonging the boiler's lifespan. For instance, some Vaillant boilers, such as the ecoFIT Pure and ecoTEC Exclusive Green iQ, possess impressive modulation ratios that contribute to their overall efficiency and performance.


Similarly, Worcester Bosch also takes consumers' needs into account. Their boilers - praised for their ideal combination of confidence, knowledgeability, and neutrality - cater to homeowners who want optimum performance coupled with energy efficiency.

Moreover, it's essential to look for boilers with a clear record of reliability; brands like Ideal and Baxi are well-recognised in the UK market for their trustworthiness and consistently high output.

When choosing a boiler, prioritise efficiency, and performance, but also consider personal requirements. A balance between quiet operation, energy savings, and meeting heating and hot water needs should guide the decision-making process. Top brands, such as Viessmann, Vaillant, and Worcester Bosch, offer options to suit various households and preferences, increasing satisfaction and ensuring the best possible performance.

Installation and Maintenance

Proper installation and maintenance are vital for the longevity and efficiency of a boiler. When considering the installation process, it is essential to hire a registered heating engineer who is well-versed with the specific boiler brand and model.


Indeed, a competent heating engineer will ensure that the system is installed correctly, optimising its performance and reducing the likelihood of any issues arising in the future.

Moreover, periodic maintenance is essential for a boiler's optimal performance. A regular servicing schedule not only ensures that the system continues to run efficiently but also helps to identify any potential issues before they escalate. During maintenance, the heating engineer will typically carry out checks and clean various components, such as the heat exchanger, to prevent limescale build-up and the accumulation of debris. Maintaining a clean system enhances its performance, prolongs its life, and lowers energy consumption.

Additionally, installing a low system pressure cut-off switch is beneficial in safeguarding the boiler. This switch is designed to automatically shut down the boiler if the water pressure within the system drops below a safe level, preventing potential damage. A boiler with a low system pressure cut-off switch not only offers better protection but also reduces the likelihood of costly repairs.

To summarise, prioritising installation and maintenance is crucial for boiler longevity, efficiency, and safety. When it comes to installations, a professional heating engineer will provide invaluable expertise in setting up the system correctly. Furthermore, adhering to a regular maintenance schedule and incorporating safety features, such as a low system pressure cut-off switch, ensures that your boiler remains in peak condition for an extended period.

Specific Model Reviews

When looking for the quietest boiler brands, several options stand out. One such choice is the Viessmann Vitodens 200-W, a highly efficient combi boiler with a noise emission of just 36dB. Featuring state-of-the-art German engineering, the Vitodens 200-W boasts a patented Inox Radial Stainless Steel heat exchanger, with a central heating output of 27.8 kW and a domestic hot water output of 30.5 kW.

The Worcester Bosch Greenstar 4000 series offers models like the Greenstar 2000 and Greenstar 4000. These compact boilers provide excellent frost protection and a user-friendly interface. In addition to their efficiency, they have a reputation for being remarkably quiet—even when operating at full capacity.

Another contender is the Ideal Logic Max series, including models like the Logic Max Heat and Logic Max C35. These boilers have a straightforward design and are known for their comprehensive 10-year warranty. Although their noise levels might be mildly higher than the Viessmann Vitodens 200-W, they remain relatively quiet and are a practical choice for homeowners.

The Baxi 600 Heat is a compact and efficient boiler with an unobtrusive sound profile. It is well-suited for small homes, fitting easily into tight spaces and providing ample heat without disrupting daily activities.

In contrast, the Vokera Vision S is a slightly larger boiler, yet maintains a quiet performance. With an LED display and modern design, it's an attractive and efficient option for modern homes.

For those seeking an oil-based heating solution, the Grant Vortex Pro XS 26 presents a strong option. Though oil boilers are often louder than their gas-based counterparts, this model is known for its lower noise emissions and excellent performance.

Whether you have a preference for Vaillant boilers, Glow-Worm Energy 12S, Ideal Mexico HE, or the Vitodens 100-W, the choice ultimately depends on the specific needs of your household. When researching and comparing boiler brands, prioritise reliable performance, energy efficiency, and, of course, how quietly the boiler operates. A confident, knowledgeable, and neutral approach will help you make an informed decision for your ideal boiler system.

Considerations When Choosing a Boiler

When selecting a replacement or an upgrade for your boiler, there are several factors to consider. In order to make an informed decision, it's essential to assess the boiler size, kW output, fuel source, and type. Finding a quiet boiler that fits your specific needs can significantly improve your home environment, especially if you are working from home.

Boiler size is an important aspect to consider, as it needs to be capable of providing enough heat and hot water for your home. A too-small boiler may struggle to heat your property adequately, while an overly large boiler could be less energy-efficient and costly in the long run. It's crucial to find an appropriate size, so consulting a heating engineer for guidance is advisable.

The kW output of a boiler is another essential factor, as it determines the level of heat and hot water it can generate. Lower outputs may be suitable for smaller properties, while larger homes may require a higher output. Keep in mind that a boiler with an adjustable output can provide energy savings by adjusting the heat generated according to your needs.

Fuel source and type also play a significant role in choosing a suitable boiler. Natural gas is the most common and widely available fuel source in the UK. It is typically used by boilers that are connected to the gas grid, making it a practical option for many homes. However, if your property is not connected to the gas grid, LPG (Liquefied Petroleum Gas) boilers can be a viable alternative. LPG boilers tend to be more expensive to run than natural gas boilers, but they can still provide an efficient heating solution for homes off the gas grid.

The type of fuel used by the boiler can also affect its efficiency and environmental impact. Boilers running on natural gas generally produce fewer emissions compared to those using LPG or other fuels. However, the efficiency and performance of the boiler can greatly depend on its make and model, so it's essential to select a boiler from a reputable brand to ensure optimal performance.

In conclusion, selecting the right boiler involves considering various aspects, such as size, kW output, fuel source, and type, along with factors relating to your specific needs and property. Taking the time to research and consult with experts can lead to a much more beneficial and efficient heating solution for your home.

Additional Information

When researching the quietest boiler brands, it's essential to consider factors such as quality, reliability, and efficiency. Many professional installers and industry experts rely on independent reviews to determine the best options on the market. Organisations like Which? often provide "best buy" recommendations to assist consumers in making informed purchase decisions.

Several boiler brands offer a range of quiet, energy-efficient models, boasting noise levels as low as 35-40dB, which is inaudible to most people. To put this into perspective, a noise level of 0dB is complete silence and sounds above 85dB may cause hearing damage over time. When comparing boilers, keep an eye on the make and model, particularly their respective sound emission ratings.

In terms of energy efficiency and performance, controls like the domestic hot water output and the use of advanced components contribute to a boiler's overall performance. For instance, features like stainless steel heat exchangers and C6 heat exchangers ensure the optimal transfer of heat while minimising energy loss.

It's crucial to consider the long-term benefits of investing in a quiet boiler range. Not only do quiet boilers contribute to a more peaceful home environment, but they often score higher in energy-saving performance, reducing overall energy bills. Before making a purchase, it's a good idea to get multiple quotes from various reputable installers to secure the best deal. Also, keep in mind that VAT will apply to the cost.

In summary, when looking for the quietest boiler brands, be sure to take quality, reliability, and energy efficiency into account. Reference sites like Which? and Boiler Guide to find trustworthy reviews and ratings, and never forget to consider sound emission levels. Lastly, gather multiple quotes from accredited installers and be prepared for VAT charges on your purchase.

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Frequently Asked Questions

Can you get a quiet boiler?

Yes, there are quiet boilers available in the market. For example, the Viessmann Vitodens 200 is a highly efficient combi boiler with a low noise emission of 36dB. Other popular boiler brands such as Glow-worm Energy, Ideal Logic Max and Plus, and recently, many of the Vaillant models, including ecoFIT Pure and ecoTEC Exclusive Green iQ.

Are modern boilers quieter?

Modern boilers are typically quieter than older models due to improved technology and design features. Manufacturers pay attention to noise reduction technologies to ensure a quieter experience for users, making modern boilers a better choice for noise-sensitive environments.

Are all boilers noisy?

Not all boilers are notably noisy, but certain factors can influence the sound level produced. Factors like installation location, age, regular maintenance, and the model itself play a role in the noise emitted by a boiler. If noise is a concern, it’s essential to select a quiet boiler model and invest in proper maintenance.

Are Vaillant boilers noisy?

Vaillant boilers are known for being relatively quiet, with 27 Vaillant models receiving the Quiet Mark certification for their low noise levels. The Quiet Mark only certifies the top 20% quietest models in each sub-category, which is an indication of Vaillant’s commitment to producing quiet boiler options.

Do combi boilers make a lot of noise?

Combi boilers, like any other boilers, vary in terms of the noise emitted. Some combi boilers are designed to be quiet and are labelled with a Quiet Mark certification. Any boiler can potentially become noisy if the installation is not ideal or if it is poorly maintained. However, many modern combi boilers tend to be notably quieter than older models.

How do Ideal Logic boilers compare in terms of noise?

Ideal Logic boilers are considered relatively quiet. Both the Ideal Logic Max and Plus models have received the Quiet Mark certification for their reduced noise levels. This highlights Ideal Logic's focus on producing boilers that not only cater to energy efficiency but also provide a comfortable and noiseless environment for the users.

Are Modern Boilers Noisy?

Modern boilers prioritize low noise levels, with many emitting sounds as quiet as a refrigerator hum. For instance, the Viessmann Vitodens 200 boasts noise emissions of only 36 dB. However, factors like poor installation or water pressure issues can increase noise. Regular maintenance and choosing reputable brands, like Glow-worm Energy and Vaillant, which incorporate sound-reducing components, ensure quieter and efficient performance.

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