Find Your Quiet with Quiet Mark's Top 10 Quietest Boilers for 2024

Worcester Bosch Greenstar 2000 Combi Boiler
Worcester Bosch Greenstar 2000 Combi Boiler

Need to replace your boiler?



With temperatures plummeting below zero, our boilers are likely to be staying on for longer periods. Getting your boiler serviced to make sure it operates effectively is crucial to ensure it doesn't break down on you when you most need it. However, when the time comes to upgrade or replace your old model, trying to find a boiler that's right for you can be quite an overwhelming task with so many options available on the market to choose from.


What type of boiler should you go for?


There are three main types of boilers to choose from - combi, heat only and system. Picking the right one for your home depends on a variety of factors such as size of household, number of radiators, water pressure and number of bathrooms.


Combi Boilers


Combi boilers (short for 'combination' boilers) are a great option for smaller households that have one bathroom and less than 10 radiators. This type of boiler is also the most compact option because it generates both your heating and hot water from a single unit. There’s no need for a separate hot water tank.


Heat only Boilers


Heat only boilers (also known as 'conventional' or 'regular' boilers) work with a separate cylinder or water tank. This type of boiler is a good choice for larger or older households with more than one bathroom and low mains pressure.


System Boilers


System boilers (also referred to as 'closed vent' or 'system sealed' boilers) need a hot water cylinder, but unlike heat only boilers, they don’t need a cold water tank. These boilers are often found in modern homes or households with a relatively modern central heating system.


Choose a Quiet Boiler


Since being founded in 2012, Quiet Mark's expert team of acousticians have assessed almost 500 boilers with less than 30% qualifying for Quiet Mark accreditation. Boiler noise currently ranges from just 36dB for the smallest up to 65dB for the largest models. But as we assess boilers in a like-for-like manner, 50dB may be considered 'quiet' for some kW output models but is far too loud for others. This is where Quiet Mark helps by taking on the science so you don't have to, by only certifying the quietest boilers of their type. The free to use online directory allows you to browse through a selection of certified products in a variety of categories, including 'Quiet Central Heating'.


Here are our top 10 Quiet Mark certified boilers for 2024 - each one among the quietest currently available on the market, helping to make your home warm and cosy, without those annoying gurgles and rattles:


ATAG iC Economiser Plus Boilers

ATAG are so confident in the reliability of their boilers, they offer the longest warranty option on the market of up to 18 years! You can also save money on your gas bills with the ATAG economiser. The boiler wastes minimal energy which saves you money and is kinder to the plant. Not only that, but it is also Quiet Mark certified meaning it can be placed in any room of your home.

Glow-worm Energy Combi Boiler

The compact Energy combi boiler is an ErP A rated boiler that offers great flexibility to install it in more spaces, including kitchen cupboards. It also has a highly efficient, modulating, Grundfos pump which lowers your running costs as it skilfully adapts to the actual heating and hot water demand in your home.

Glow-worm Energy System Boiler

Built right here in the UK at Glow-worm’s award winning factory in Belper, the Energy system boiler is a high quality boiler that’s designed to lower your running costs. Its high efficiency modulating Grundfos pump adapts to your actual heating and hot water demand, reducing your energy bills.

Ideal Logic Max Combi Boilers

The Ideal Logic Max Combi boiler is the next evolution of the award-winning Logic range with a range of new features including a larger high resolution colour screen and sleek modern design. The Logic Max Combi comes with an Ideal System Filter, enhancing the longevity of your boiler to reliably heat your home, whilst been covered by a 10 year warranty.

Ideal Logic Max Heat Boilers

The Ideal Logic Max Heat boasts a range of great features, including a high quality Ideal System filter, to enhance the endurance of your boiler. With a compact cupboard fit and a large digital display screen, it can be installed discreetly in your home and is easy to use. The Logic Max Heat benefits from a 10 year warranty, giving you peace of mind.

Vaillant ecoFIT pure combi and system boiler range

Ultra-quiet operation, small footprint and total flexibility, the ecoFIT boasts automatic purging assistance and high spec, aluminium heat exchanger makes for a lightweight installation. High quality and high efficiency, together with the complete availability of spare parts and the easy accessibility of the unit layout mean the ecoFIT pure is easy to maintain too.

Vaillant ecoTEC exclusive Green IQ boiler range

The ecoTEC exclusive Green iQ is Vaillant's first ever boiler product with the power of Green iQ technology. The ecoTEC exclusive intelligently manages consumption and output to keep all its components running at peak performance, for longer, providing a low-maintenance solution that you can rely on.


Vaillant ecoTEC Plus Combi Boiler

The new ecoTEC plus is the product of hours of research and development, years of expertise and innovation and a series of fine, precise improvements that have sharpened, intensified and enhanced performance specifically for the UK market. We’ve started with a classic, and taken it to the next level. 

Worcester Bosch Greenstar 2000 Combi Boiler

The Greenstar 2000 is Worcester Bosch's lowest priced combi boiler, suitable for apartments, small and medium sized homes with one bathroom.

This is the quietest Worcester Bosch combi boiler, and has been designed to provide an attractive solution that comfortably fits between standard kitchen cupboards.


Worcester Bosch Greenstar 4000 System Boiler

The Greenstar 4000 is perfect for small to medium sized homes with one bathroom, it features a modern new design, an easy-to-use full colour text display and it’s quiet too. The Greenstar 4000 has a wide power range to meet all of your heating and hot water needs, whilst doing so efficiently.

About Quiet Mark International

What is Quiet Mark?


Quiet Mark is the international certification programme associated with the UK Noise Abatement Society charitable foundation (est. 1959). Conducting expert acoustic testing and verification of products Quiet Mark has over the past 13 years driven change in manufacturing worldwide to prioritise noise reduction within the design of everyday machines, appliances, technologies and house build materials, creating the first one-stop platform for third-party approved noise reduction solutions for every living space to health and well-being.


Through specialist acoustic measurement and product assessment, Quiet Mark identifies the quietest products in over 80 product categories giving consumers, trade buyers, architects and specifiers a more informed choice about the sound levels of the products they buy to empower responsible product sourcing. The Quiet Mark scheme drives designers and manufacturers to reduce sound levels of their products enabling households and workplaces to rebalance the soundscape reducing stressful unwanted noise.


Why Quiet Mark?


"I couldn't hear my baby crying over the noise of the hairdryer"


The damaging effect of excessive noise on health, productivity and social cohesion is seriously underestimated. World Health Organisation research shows that environmental noise pollution affects mental and physical health and is now second only to air pollution as the world’s largest killer pollutant. Across an estimated population of 340 million people, at least 1 million years of healthy living are lost each year due to noise pollution in Western Europe.


In our fast-paced lives, vibrancy is exciting and necessary. But this heightened state can only be valued if there is also the opportunity to choose the alternatives of calm, quiet and the chance to switch off. Quiet Mark was established to provide a credible, independent public health product symbol and directory to help consumers and industry easily identify quietest products for the home, at work and for public spaces.


The Building Sector


In February 2020, in a move to further expand its service to tackle noise-related problems in building design Quiet Mark launched its Acoustics Academy to include third-party verification of specialist acoustic materials for the building sector including - walls, floors, ceilings, doors, windows etc.


This brand-new online platform further equips and empowers architects, builders and designers with a guide to expertly verified leading acoustic solutions for every building application area. For more details - www.acousticsacademy.com


Our Partnerships


Quiet Mark has established a unique alliance of partnerships with leading retailer groups who are helping shoppers to find the quietest appliance technology available on the market at point of sale including John Lewis & Partners, Argos Sainsburys, Currys, Harrods and Appliance City.


Quiet Mark’s top level partnership with NBS, a leading construction data and specification platform, empowers architects to specify ‘acoustics first’, by providing a short-cut for specifiers to source responsible products. The new partnership will enable the 3,600+ practices that use NBS to create specifications to easily source and find Quiet Mark certified products and materials.


The Quiet Mark RIBA-Approved CPD for the Building Sector is subscribed to by hundreds of architect practices as part of the education side to Quiet Mark’s charitable remit.


Quiet Mark works in partnership with the US Good Housekeeping Institute for the past 8 years, one of the most trusted and respected names in America, acoustically testing and reviewing products for the benefit of its readers and raising the bar for quality acoustic design to support consumers health.


By highlighting the distinctive purple Quiet Mark as a trusted symbol, our retail and industry partners are enabling a more informed choice about quieter high-performance products, a powerful example of collective care to combat stress-related noise; an important health and environmental issue.


Find Your Quiet Campaign


In a troubled world finding your quiet every day is powerful and necessary to navigate the times. One of the antidotes to anxiety, stress and uncertainties can be found in the Quiet.


From the latest evidence indicating extensive noise intolerance with the necessity for more quiet, Quiet Mark has responded creating a multi season campaign to help the nation find what it’s looking for. The first A/W’23/24 season filmed across several stunning land and seascapes off the West Coast of Scotland, each of the four films carried by an original music score composed by featured world class musicians Hattie Webb (Sting/Leonard Cohen) & Andrea Resce.


The new S/S’24 Find Your Quiet TV campaign showcases the shining stars of low noise technology in cinematic glory Quiet featuring several Certified brands alongside our real life heroes for the Overcomers campaign story. Chosen for their courage walking through seasons of health challenges our ad idents feature Sandy, Anna, Mark and Elijah the pussy cat, when Quiet meant the most to them.

Quiet Mark believes in the extraordinary benefits of communion within the beauty of our natural world. Acoustic instrumentals for the Beach, Forest, Mountain and River locations lead listeners to discover the moments of wonder experienced in the near silence nature recordings at the end of each film.


Listen to the Find Your Quiet TV soundtracks on all major streaming platforms: https://lnk.to/s7GaoOju

Discover more at www.findyourquiet.co.uk


Our Heritage


The Noise Abatement Society (NAS) was founded in 1959 by the entrepreneurial businessman John Connell OBE who believed that being exposed to excessive noise profoundly affected health, children's learning, productivity, and general quality of life – he called noise ‘the forgotten pollutant’.


John almost single-handedly lobbied the Noise Abatement Act through Parliament, when in 1960, noise became a statutory nuisance for the first time in the UK. His practical problem-solving included introducing rubber dustbin lids and plastic milk crates to reduce urban disturbance, stopping night flights, and in the early 70’s he commissioned detailed planning for a revolutionary Thames Estuary Airport directing flight paths out to sea.


Today the internationally respected NAS seeks to accelerate change to protect future generations from a worsening aural environment by disseminating new methods of sound management, running an awareness programme for schools, incentivising industry to design low-noise technology and providing the only national helpline dedicated solely to the problems of noise. NAS cannot change the human condition, but it can offer practical ways to support those who wish to exercise choice in an otherwise noisy world.


For more details - www.quietmark.com

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