31/01/26
There’s a big difference between “cleaning” and properly servicing a heat pump. It’s a bit like a car—you wouldn’t expect a car wash operator to service your engine.
So, How often should I service my heat pump? The simple answer is: at least once a year if you rely on it for heating in winter or cooling in summer.
According to the technical team at Oxygen Air, most modern units operate between 30–60 decibels (dB).
To put that into context:
So when people ask are heat pumps noisy, the honest answer is that they’re typically no louder than background household sound.
Inside the home, most systems are designed to be “whisper quiet”, while the outdoor unit produces a low, consistent hum rather than disruptive noise.
It’s also worth noting that sound levels can increase slightly when the unit first starts up or when working harder to reach temperature—but this usually settles quickly once it stabilises.
A major factor in whether people think are heat pumps noisy is actually installation quality.
Poor placement or fitting can amplify sound unnecessarily.
To avoid this, outdoor units should:
Oxygen Air often finds that so-called “noisy heat pumps” are actually just poorly installed systems. Correct installation makes a significant difference in perceived sound levels.
Where your outdoor unit sits can dramatically change how loud it feels.
If it’s placed:
…sound can bounce or carry further than expected.
This is why professional installers carefully plan placement—not just for performance, but for comfort and neighbour-friendly operation.
So again, if you’re wondering are heat pumps noisy, the real answer often depends on where and how they’re installed.
Heat pump enclosures are becoming more common in New Zealand homes.
They can:
However, airflow is critical. Any enclosure must be designed correctly to avoid restricting ventilation or impacting performance.
Adding sound-dampening materials is possible, but should always be done carefully and professionally to avoid overheating or warranty issues.
Heat pumps can make a range of normal operational sounds, including:
These are generally normal.
But if you notice:
Then it’s likely a maintenance issue such as worn bearings or debris build-up.
A professional service from a team like Oxygen Air will usually resolve these issues by cleaning components, checking refrigerant levels, and ensuring everything is running smoothly and quietly.
While most concerns around are heat pumps noisy focus on outdoor units, indoor units are also designed for low sound levels.
Noise indoors can usually be reduced by:
In most cases, indoor units are quieter than typical household background noise—especially compared to TVs, appliances, or even everyday conversation.
So, How often should I service my heat pump? For most households, once a year is the safest and most effective guideline.
Regular professional servicing keeps your system efficient, reduces running costs, and helps avoid unexpected breakdowns—especially when you need it most.
If it’s been a while since your last service, it’s worth getting it checked by a qualified technician like Oxygen Air to make sure everything is running as it should.
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