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Are wall-mounted heat pumps noisy?

Evaluating the Noise Levels of Wall-Mounted Heat Pumps

At AirGreen, we're proud to be a leading HVAC company in Montreal, dedicated to providing top-tier heating and cooling solutions for your home or business. One of our most popular offerings is the wall-mounted heat pump (also known as a mini split), a versatile HVAC system capable of both heating and cooling a space.

A question we frequently encounter from potential clients is, "Are wall-mounted heat pumps noisy?" In this in-depth article, we'll examine the noise levels of these devices, the factors that can influence this aspect, and the steps you can take to minimize any potential noise.

Noise Levels of Wall-Mounted Heat Pumps

Modern wall-mounted heat pumps are designed to be as quiet as possible, especially compared to older HVAC units or other types of heating and cooling systems. When properly installed and maintained, they operate at a noise level that's often comparable to the background noise in a quiet room or office.

The noise produced by a heat pump is measured in decibels (dB). On average, the indoor component of a wall-mounted heat pump operates around 20 to 30 dB, while the outdoor component can range from 40 to 60 dB depending on the unit's size and capacity. By comparison, a conversation at home is typically around 50 dB, and a whisper is around 30 dB.

Factors That Can Influence Noise Levels

Several factors can influence the noise levels of a wall-mounted heat pump:

  1. The Age and Quality of the Unit: Newer models are generally quieter than older ones, thanks to advancements in technology and design. Higher-quality units also tend to be quieter, as they're built with superior materials and noise-reducing technology.
  2. Installation: Proper installation is crucial in minimizing noise. An improperly mounted unit can result in increased vibration, which leads to higher noise levels.
  3. Maintenance: Regular maintenance can ensure the unit continues to operate quietly. A lack of maintenance can lead to worn-out parts that can cause the unit to be noisier.
  4. Operation Mode: Heat pumps can be noisier when operating in certain modes. For example, during defrosting cycles in winter, the outdoor unit can be louder.

Tips for Reducing Noise

If you're concerned about noise, here are some tips that can help reduce the sound from your wall-mounted heat pump:

  1. Proper Installation: Ensure your unit is installed by a professional HVAC technician who is familiar with the specific brand and model of your heat pump. At AirGreen, our technicians are trained to install a variety of heat pump models and know how to set them up for quiet operation.
  2. Regular Maintenance: Schedule regular maintenance to keep your unit in optimal condition. This includes cleaning, checking for worn-out parts, and tightening any loose components.
  3. Noise Barriers: If the outdoor unit is the cause of the noise, consider installing a noise barrier. This could be a fence, a wall, or even vegetation, which can absorb some of the sound.
  4. Strategic Placement: Position the outdoor unit as far away as possible from windows and doors, and avoid installing it near bedrooms if possible.


While wall-mounted heat pumps do generate some noise, it's usually at a level that's comfortable for most people. With proper installation, regular maintenance, and strategic placement, you can ensure your heat pump operates as quietly as possible.

At AirGreen, we are committed to providing HVAC solutions that work best for you. If noise is a concern, we can help you select and install a heat pump system that aligns with your needs and expectations.