Quietest Boiler in 2024 and Top 7 Quiet Boilers in the UK

James Elston
Written by James Elston
Updated on 2nd January 2024
Posted on 1st January 2024
Topic: Boiler Advice

Sssssshhh! Can you hear it? No, us neither. That’s one of these quiet boilers heating your home and hot water without letting you know it is even doing so.

worcester 2000 and 4000 quiet mark

Or, are you tired of dealing with a loud boiler that disrupts your peaceful home environment? Don’t worry; we have got you covered.

Hopefully, you can hear yourself think and take everything in while we explore the quietest boiler options available in the market to help you make an informed decision when upgrading to the quietest boiler and central heating system.

Quick fact – did you know that if your boiler is noisy, it’s using more energy creating this noise than actually heating your home? Think about clapping, the harder you clap the more energy you use.

Sit back, relax and join us on this tranquil journey to a warm and peaceful life.

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Quietest boilers overview

  • Overview of what boiler sound levels are and the decibel scale which is essential for selecting a quiet, efficient boiler.
  • The good bit – The top 7 quietest combi boilers offer superior performance, efficiency and minimal noise levels.
  • The boring bit – All about how regular maintenance, soundproofing techniques and proper installation are important steps to reducing boiler sound in your home.
  • FAQs including what the Quiet Mark accreditation is.

What do Boiler Noise Levels Mean?

A loud boiler, especially from an old clunky inefficient noisy boiler, can greatly affect your living conditions.

A quieter boiler means a tranquil living environment, promotes productivity, and obviously contributes to peaceful nights for your household.

But how do you know which boiler is quiet enough for your home?

To answer this question, we need to understand how boiler noise levels are measured and the factors that contribute to noise production.

What is the decibel scale for boiler noise?

The intensity of sound emitted by a boiler is measured using a universal decibel scale, which is essential for comparing the noise levels of different boilers in a central heating system.

quiet mark

The European ErP decibel rating system offers an easy way to assess the efficiency and noise levels of boilers. Homeowners can use it to compare and decide which boiler is right for them.

Identifying high-quality and quiet boilers is easier when you consider products with the Quiet Mark certification. This accreditation signifies that the boiler has passed stringent noise reduction and acoustic standards.

Quiet Mark Fact – Boiler companies have to submit their products to be tested for quietness – If they don’t want it or don’t submit they don’t get it – simples.

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What makes a boiler quiet?

Several factors influence the sound output of what makes a boiler quieter or louder, such as:

  • Design: determines the size, shape, and materials used in construction
  • Insulation: plays a significant role in minimising sound transmission through the walls of the boiler
  • Installation: proper installation can help reduce sound output and noise levels

Furthermore, appropriate installation can lessen sound output by guaranteeing a secure boiler installation and proper insulation of pipes and other components. Taking these factors into account can guide you towards brands that value noise reduction.

Top 7 Quietest Combi Boilers

1Worcester Bosch 4000 25kW44
2Viessmann Vitodens 050-w 25kW46
3Worcester Bosch 2000 25kW 43
4Viessmann Vitodens 200-w36
5Ideal Logic C3544
6Vaillant ecoTEC Plus45
7ATAG i2446
*In order of best for homeowners

Armed with an understanding of boiler noise levels, we can now examine the top 7 quietest combi boilers in the market. These boilers are chosen for their superior performance, efficiency, and minimal noise levels.

If you’re looking for one of the quietest boilers, these quiet combi boiler models are definitely worth considering.

Bare in mind though, these are not in order of quietest, just the best options for homeowners in the UK – For example, the Vitodens 200-w is one of the most expensive combi boilers on the market, and the ecoTECplus isn’t great value for money.

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Worcester Bosch Greenstar 4000 25kW

This is one of the best selling combi boilers in the UK and also comes with the Quiet Mark accreditation.

The Worcester Bosch Greenstar 4000:

  • Is a versatile and quiet combi boiler
  • Has an ErP decibel rating of 42
  • Is equipped with a high-efficiency aluminium heat exchanger
  • Has a low-energy pump
  • Has a low-noise fan

This boiler minimises noise output in your home while providing optimal performance. keeping energy bills down

If you’re looking for a reliable and quiet boiler, the Worcester Bosch Greenstar 4000 is an excellent option and is a great choice

Viessmann Vitodens 050-w 25kW

This Viessmann Vitodens 050 25kW model is the loudest boiler in the list of quiet boilers at 46 decibels, but only by one decibel. The Vaillant ecoTEC range has been given the quiet mark rating at 45 decibels, so an extra decibel for this incredible value boiler makes it worthy of the list.

The Vitodens 050 is the best-selling combi boiler of 2024 so far. With its ultra-reliable stainless steel heat exchanger, built-in wifi and kitchen cupboard fit dimensions. This super quiet combi boiler is perfect for the average home in the UK and can be hidden neatly away with minimal fuss.

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Worcester Bosch Greenstar 2000 25kW

With its Quiet Mark accreditation, the Worcester Bosch Greenstar 2000 25kw is an excellent combi boiler. It works quietly and has an ErP Decibel rating of 43 which makes it highly efficient. This boiler is suitable for those who require hot water on demand, as it is produced almost immediately.

With its impressive performance and low noise output, this boiler is an excellent choice for homeowners looking for a quiet and efficient heating solution.

Viessmann Vitodens 200-W

The Viessmann Vitodens 200-W is a top-performing combi boiler with an outstanding efficiency rating of 98% to the highest standards. What sets this boiler apart is its incredibly low noise level of 36 dB, making it one of the quietest options in the market.

If you’re seeking a powerful and efficient boiler with quiet operation, the Viessmann Vitodens 200-W is an excellent choice.

Ideal Logic Max C35

The Ideal Logic Max C35 is a powerful and efficient combination boiler, also known as a combi boiler, designed to provide heating in large homes with up to 20 radiators. This boiler offers a noise level of 44 dB, making it an ideal choice for homeowners who value both power and quietness.

With its impressive performance and low noise output, the Ideal Logic Max C35 is a great addition to any home.

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Vaillant ecoTEC Plus Range

The Vaillant ecoTEC Plus Range offers a selection of quiet combi boilers with noise levels as low as 45 dB. These boilers are designed with efficiency and quietness in mind and are an excellent choice for homeowners seeking a balance between performance and noise reduction.

With their low noise output and high efficiency, the Vaillant ecoTEC Plus Range boilers are a great addition to any home.

ATAG i24

The ATAG i24 is a dependable and highly efficient combi boiler with a noise level of 49 dB. One of the key features of this boiler is its extended warranty of up to 18 years, providing peace of mind for homeowners.

With its reliability and efficiency, the ATAG i24 is a great choice for those seeking a quiet and high-performing boiler.

Quietest System Boilers and Regular Boilers

While the convenience and efficiency of combi boilers make them popular, system and regular boilers are still prevalent in many households. If you’re contemplating a system or regular boiler, selecting a quiet model is key to preserving a serene home environment.

In this section, we will explore the quietest system and regular boilers available in the market, helping you make the right choice for your home.

System and regular boilers are different in how they provide heating and hot water. System boilers use a heat exchanger to warm water from the mains and store it in a hot water cylinder, while regular boilers utilise large cold water storage tanks that feed the boiler, rather than being directly supplied by the main water source.

Choosing the right boiler type for your home depends on factors such as property size, hot water demand, and energy efficiency.

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Best Quiet System Boilers

If you’re in the market for a quiet system boiler, we have compiled a list of the best options available, featuring models from Worcester Bosch, Ideal, and Vaillant. These system boilers are known for their low noise levels and efficient performance, ensuring a peaceful and comfortable home environment.

The Vaillant EcoTec Plus 630 is the quietest system boiler available, boasting a noise level of 48 dB. The Ideal Logic Max Heat 12 kW boiler offers a compact design that can be conveniently stored in a kitchen cupboard, with an ErP dB rating of 36 kW.

Another option is the Ideal Logic Max Heat 30 kW boiler, with a sound intensity of 49 dB. These system boilers provide excellent performance and low noise levels, making them ideal choices for any home.

Best Quiet Regular Boilers

For those who prefer regular boilers, we have also compiled a list of the best quiet regular boilers on the market, featuring models from Viessmann, Baxi, and Ideal. These regular boilers are known for their low noise levels and efficient performance, ensuring a warm and peaceful home.

The Glow-worm Energy 12S is a quiet regular boiler with a sound output of 45 dB. The Worcester Bosch Greenstar Ri has a decibel rating of 45 dB, while the BAXI 600 Heat boilers range between 37 dB and 49 dB in terms of sound levels. The Viessmann Vitodens 100-W Open Vat is another quiet option with a noise level of 39 dB.

With their low noise levels and efficient performance, these regular boilers are excellent choices for homeowners seeking a quiet heating solution.

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Tips for Making a Boiler Quieter

While the selection of a quiet boiler is vital, implementing measures to diminish the sound of a boiler at home is equally significant. We will provide some strategies to mitigate boiler noise, including regular maintenance, soundproofing methods, and correct installation.

By following these tips, you can ensure a quieter and more comfortable home environment.

Regular Maintenance

Regular maintenance is essential for keeping your boiler’s noise levels low and ensuring optimal performance. By monitoring the boiler pressure, cleaning the heat exchanger, and replacing any worn-out components, you can prevent boiler noise and prolong your boiler’s lifespan.

It’s also important to consult a heating engineer for regular inspections and servicing, as they can identify and address any potential issues before they escalate.

Soundproofing Techniques

In addition to regular maintenance, soundproofing techniques can be employed to reduce boiler noise. Acoustic panels are designed to absorb sound waves and can be affixed to walls or ceilings to limit the amount of noise transmitted.

Carpet tiles, composed of a thick, dense material, can be laid on floors to decrease the amount of noise transmitted. By incorporating soundproofing techniques, you can further lower boiler noise and create a more peaceful living environment.

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Proper Installation

Proper installation is essential for reducing boiler sound output and ensuring the safety and efficiency of your heating system. A Gas Safe registered engineer should install your boiler, as they have the necessary qualifications and certifications to ensure the job is done correctly.

When installing a boiler, it’s important to ensure that it is in a well-ventilated area and away from any noise-sensitive areas, such as bedrooms or living spaces. By ensuring proper installation, you can cut down noise transmission and enjoy a quieter and more comfortable home.

Choosing the Right Quiet Boiler for Your Home

Choosing the appropriate boiler for your home is vital for comfort, cost-effectiveness, and environmental impact. Aspects like property size, hot water demand, energy efficiency, and professional consultation are fundamental in making a sound decision.

In this section, we will discuss these factors in detail to help you make an informed decision when choosing a quiet boiler for your home.

Property Size and Hot Water Demand

Property size and hot water demand are key factors in selecting an appropriate boiler. Generally, a larger property with a higher hot water demand will necessitate a larger boiler than a smaller property with a lower hot water demand.

When choosing a boiler, it’s important to consult with a heating engineer, as they can help you identify the correct size and type of boiler for your specific needs. By considering your property size and hot water demand, you can ensure that you select the right boiler for your needs.

Energy Efficiency

Energy efficiency is another important factor to consider when choosing a boiler. Condensing boilers are more efficient than standard boilers, as they capture and reuse heat that would otherwise be lost, thus making them a more environmentally friendly option.

Eco-friendly models are designed to reduce emissions and energy consumption, helping to reduce their environmental impact. By prioritising energy efficiency, you can save money on your energy bills and reduce your carbon footprint.

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Speak to one of our Experts or a Heating Engineer

Engaging with an expert from Boiler Central heating engineer is critical in selecting the optimal boiler for your specific requirements. They can offer expert advice on:

  • Boiler installation
  • Servicing
  • Repairs
  • Energy efficiency
  • System upgrades

This will aid in your decision-making process and guarantee the best performance and safety of your heating system.

When seeking a qualified heating engineer, it’s essential to:

  • Conduct thorough research
  • Read reviews
  • Request references
  • Verify their qualifications and certifications

By consulting with a heating engineer and researching boiler manufacturers, you can ensure that you choose the best heat only boilers for your home.


In conclusion, choosing the quietest boiler for your home is essential for maintaining a peaceful and comfortable living environment.

By understanding boiler noise levels, considering factors such as property size, hot water demand, and energy efficiency, and consulting with a heating engineer, you can make an informed decision when selecting a quiet and efficient boiler.

With the right boiler, you can enjoy a warm and peaceful life in your home.

Frequently Asked Questions

Can you get a quiet boiler?

Yes, you can get a quiet boiler. For example, the Worcester Bosch Greenstar 2000 has a decibel rating of 43dB, which is lower than that of a library.

The Viessmann Vitodens 200 has a low noise emission of 36dB. Both boilers are well suited to small-medium sized homes with 1-2 bathrooms.

Are newer boilers quieter?

Newer boilers are generally quieter and simpler to live with due to improved design, materials, and combi boilers. This makes them a much more pleasant option for households with close proximity to the water tank or boiler. These units also benefit from being smaller in size, allowing them to fit into modern homes without sacrificing much needed space.

What factors should I consider when choosing a quiet boiler?

When selecting a quiet boiler, be sure to consider its noise level, design, insulation, and installation. Additionally, consulting with a heating engineer for the proper selection and installation is recommended.

What is the Quiet Mark certification, and why is it important?

The Quiet Mark certification guarantees a product’s sound-friendliness, indicating a high-quality and efficient product. It is an important certification that helps consumers ensure they are buying the best possible product in its category.

How can I reduce boiler noise in my home?

Maintaining your boiler, using soundproofing techniques, and ensuring proper installation are essential steps to reduce boiler noise in your home.

Written by
James Elston
James Elston Director Of Boiler Central
Posted on: 1st January 2024
Topic: Boiler Advice

James Elston is our resident boiler replacement and heating expert here at Boiler Central. With over 20 years experience in the boiler installation industry, James ensures that he knows everything there is about our Gas Safe boiler installations, energy saving and home heating solutions. This can be from simply procuring the latest best combi boilers, to reviewing and ensuring that Boiler Central maintains the highest standards across our boiler installation company.

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