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How Loud are Air source Heat Pumps?

Nick Geary
By: Nick Geary
Updated: 20th April 2022

How Loud are Air Source Heat Pumps?
A common drawback for air source heat pumps is how loud they are. The outdoor fan unit could interrupt the serene atmosphere in a tranquil garden or produce a steady hum that prevents a silent night, but how loud are air source heat pumps? We've provided some noise comparisons to everyday sounds, to give you an idea of how loud each model could be.

Heat pump noise comparisons

The heat pumps we will be comparing noise levels for in this article all appear in "Which are the Best Air Source Heat Pumps?“. For each of the air source heat pumps we list, we will be taking the noise level in decibels (dB) which the manufacturer provides, and comparing it to some common noises that are in the same noise register. This measurement is known as the 'sound power level' of each unit, which is a measure of how much noise it emits.

As you get further away from a heat pump, the amount of noise drops. Several heat pump manufacturers reference a decibel level recorded 3 metres away from their heat pump for their marketing figures to make them seem less noisy. The figures we will use are at the source, to ensure the comparisons are fair and accurate.

How loud is the Daikin Altherma 3

Electric ShaverThe high temperature air source heat pumps in Daikin's Altherma 3 range, have a sound power level of 54dB. This is equivalent to the noise of having an electric toothbrush or coffee percolator running on the outside of your property.

The low temperature Monobloc units in the Altherma 3 range are even louder. They produce noise at a sound power level of 62dB. This makes an amount of noise that sits between the volume of a normal conversation and an electric shaver.

How loud is the Nibe F2040

The Nibe F2040 is only available in low temperature models. The sound levels these heat pumps make, is dependent on their output size (6kw – 16kw). The sound power levels produced range from 50dB, which is the same as moderate rainfall, to 61dB which is similar to the sound of a normal conversation.

How loud is the Samsung Eco Heating System

London UndergoundThe low temperature units in Samsung's Eco Heating System range produce noise levels from 58dB, which is twice as loud as an electric toothbrush, to 75dB which is equivalent to having a coffee grinder running for long periods of time.

Surprisingly, some of Samsung's TDM plus units with 2 fans produce noise levels of up to 107dB, which is louder than factory machinery and similar to the noise levels people experience when commuting on the London underground!

How loud is the Vaillant aroTHERM

Vaillant's newest range of air source heat pumps, the aroTHERM plus range, produce noise levels from 54dB, similar to the sound of a coffee percolator, to 60dB, the average noise made by a sewing machine.
Some of their aroTHERM split units are slightly quieter, with noise levels starting from 53dB.

How loud is the Viessmann Vitocal

Units in Viessmann's low temperature Vitocal range produce noise levels from 50dB, which is equivalent to the average noise of light traffic, to 68dB, the noise level of busy city traffic.

How loud is the Mitsubishi Ecodan

Busy RestaurantThe low temperature heat pumps in the Mitsubishi Ecodan range produce noise levels which range from 53dB, equivalent to the sound made by heavy rainfall, to 67dB, the amount of noise you'd expect to hear in a busy restaurant.

How loud is the LG Therma V

The LG Therma V range includes low temperature heat pumps which produce noise levels between 57dB, which is similar to the noise produced by a group conversation, and 69dB which is equivalent to the amount of noise in a busy classroom at a school.

The high temperature heat pump has a sound power level of 63dB which is similar to the level of noise a dishwasher makes.

How loud is the Hitachi Yutaki

MinibusThe Hitachi Yutaki range includes low temperature heat pump models which produce noise levels from 61dB – 74db, which is the difference between a TV and the noise of an average minibus!

Their high temperature heat pumps are generally quieter with their noise levels ranging from 61dB to 64dB which is equivalent to the noise made by a loud washing machine.

How loud are air source heat pumps? Decibel Chart

Other considerations

As well as the noise they produce, there are several things about air source heat pumps you should consider before investing in one.

Heat pump size

Air source heat pumps can take up a lot of outdoor and, sometimes, indoor space. It's hard to gauge the size of a heat pump just from pictures of it too. That's why we've created a size guide to explain what size (output) air source heat pump you will need for your home, and just how big (dimensions) it will be. You can access it here: What Size Air Source Heat Pump Do I Need? Outputs & Dimensions

If your home is suitable

If you're looking to install an air source heat pump as part of a renovation project or to replace a boiler, you need to ensure your property is suitable for installing one. Not every property in the UK is suitable, and there are many things you'll need to check. Fortunately we've created an article covering what your home will need, to be suitable for an air source heat pump. You can find it here: Is My House Suitable for a Heat Pump?

The cost

Air source heat pumps are not cheap to buy and install. Even with the help of different government grants and schemes, you may find that it's out of your price range. To get a better idea of how much it costs to install an air source heat pump in your home, we recommend taking a look at the following article: How Much Does an Air Source Heat Pump Installation Cost?

Nick Geary

About the author

Nick Geary

Nick has a wide range of experience writing about conventional and renewable heating solutions, and is always increasing his knowledge by researching any new heating technologies on the horizon.

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