Are Heat Pumps Noisy?

When looking at installing a heat pump, one of the biggest questions we see among homeowners is how much noise it will make. Since the exterior unit is always visible, it’s reasonable to want to know how much disturbance it will create for your household and neighbours. So, are heat pumps noisy?

Fortunately, modern air-to-water heat pumps are much less noisy than many would think. Although there is some noise generated while operating due to the fan and compressor, advancements in compressor designs, fan designs and installation techniques have allowed modern systems to run with much less noise than previously. Here are some important details about heat pump noise.

Are Heat Pumps Noisy?

Since an air-source heat pump includes a fan and compressor, some operational noise is unavoidable. However, current systems are specifically designed to minimise this noise as much as possible. For example, the Midea M Monobloc heat pump provided by us at Pipelife Eco has a sound pressure rating of just 35 dB(A) at 3 metres – noise levels similar to those produced by the average refrigerator, gentle rain or a dishwasher.

Is All Of The Noise Produced By The Outdoor Unit?

Almost all of the noise produced by a heat pump comes from the outdoor unit. In addition to producing minimal noise indoors, most standard indoor components make no more noise than any other heating system. If you are considering installing a split heat pump system, the outdoor unit can often be placed away from neighbouring homes. Additionally, split systems are known for producing extremely quiet operation, allowing for increased installation flexibility.

Why Proper Installation Matters

Regardless of how quiet a heat pump is rated by manufacturers, if it is not properly installed by an experienced technician, even the quietest heat pump can sound significantly louder than desired. Properly installed heat pumps take into consideration:

• Proximity to neighbouring properties.
• The direction in which fans face.
• Methods of mounting units that prevent vibrations.
• Ensuring adequate airflow around each component.

Will My Heat Pump Get Louder In Winter?

Are heat pumps noisy in winter? During periods of extreme cold, the system requires more energy to pull heat from the ambient air. As a result, fan and compressor speeds may increase. Most modern inverter-based heat pumps automatically adjust their output based on demand for optimal performance and reduced noise levels. Although temperature fluctuations may require occasional minor increases in speed, the increase is typically short-lived and moderate, leading to minimal noise increases overall.

Can My Neighbours Hear It?

Generally speaking, a properly installed heat pump is not likely to become a source of annoyance for surrounding neighbours. Modern units are constructed to comply with strict regulations regarding noise emissions. Installers will consider potential noise impacts on adjacent properties during the initial design and planning stages.

So are heat pumps noisy? To summarise: probably not for most homeowners. Today’s air-to-water heat pumps are engineered to provide efficient and quiet operation. Although there will be some audible humming or sound from the outdoor unit while operating, it is generally similar to most other household appliance noises, such as refrigerators, rainfall or dishwashers, and much quieter than most homeowners anticipate. If you have any further questions, please get in touch with the Pipelife Eco team for assistance today.