Comment une thermopompe murale gère-t-elle l'humidité?
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How does a Wall-Mounted Heat Pump Handle Humidity?

How does a Wall-Mounted Heat Pump Handle Humidity?

Welcome to AirGreen, your go-to HVAC company in Montreal. We specialize in providing and installing wall-mounted heat pumps, also known as mini splits, which deliver cooling and heating functionalities. In this comprehensive guide, we aim to discuss a prevalent concern - "How does a wall-mounted heat pump handle humidity?"

A Brief Overview of Wall-Mounted Heat Pumps

Wall-mounted heat pumps, often referred to as mini splits, are HVAC systems that offer a solution for heating and cooling in your home or commercial space. They are composed of an indoor unit mounted on the wall and an outdoor unit housing the compressor. The units are connected through a conduit that carries power lines, refrigerant tubing, and a condensate drain.

These units function by transferring heat rather than generating it. In winter, they draw heat from the outdoor air and transfer it inside. In contrast, during the summer, they extract heat from your indoor air and release it outdoors.

Understanding Humidity and its Impact

Humidity refers to the amount of water vapor present in the air. In climates where the humidity is high, the air can feel warmer than it actually is. This is because high humidity levels can reduce the body's ability to cool itself through sweating. On the other hand, air in low humidity can feel cooler than the actual temperature. This is because dry air can cause moisture to evaporate from the skin more quickly, making you feel cooler.

Managing indoor humidity is crucial not only for comfort but also for health. High humidity can lead to mold growth and exacerbate allergies, while low humidity can dry out the skin and respiratory passages, increasing vulnerability to colds and respiratory illness.

Wall-Mounted Heat Pumps and Humidity Control

One of the benefits of wall-mounted heat pumps or mini splits is their ability to control humidity levels in your indoor environment. Let's explore how this works:

Dehumidification During Cooling

When in cooling mode, a wall-mounted heat pump functions similarly to an air conditioner. The unit's evaporator coil absorbs heat from the indoor air. As the warm air passes over the evaporator coil, it also loses some of its moisture. This moisture condenses on the coil and is removed from your indoor air, effectively reducing the humidity level.

Maintenance of Comfortable Humidity in Heating Mode

During heating mode, the heat pump absorbs heat from the outdoor air to heat your indoor space. Since the unit is not removing moisture from the indoor air during this process, it helps maintain a comfortable humidity level. However, if the indoor air is too dry, you might consider using a humidifier to add moisture to the air.

Auto Mode for Optimum Humidity Control

Most modern wall-mounted heat pumps come with an auto mode. When set in this mode, the heat pump can automatically adjust its operations based on the temperature and humidity levels. This means that it can effectively manage both the temperature and the humidity in your space, ensuring optimal comfort.

Tips to Maximize Humidity Control with your Wall-Mounted Heat Pump

Here are some tips to help you make the most of your wall-mounted heat pump's humidity control capabilities:

  1. Regular Maintenance: Regular maintenance is crucial to ensure that your heat pump is functioning effectively and efficiently. This includes cleaning or replacing the filters, checking the refrigerant levels, and ensuring that the evaporator and condenser coils are clean.
  2. Proper Size: It's essential to have a correctly sized heat pump for your space. An undersized or oversized unit will not control temperature and humidity effectively.
  3. Indoor Air Quality: Consider other elements of indoor air quality such as ventilation. Even with a heat pump controlling temperature and humidity, good ventilation is essential for maintaining a healthy indoor environment.


A wall-mounted heat pump can effectively manage humidity in your indoor environment, making it an excellent option for comfort and air quality. At AirGreen, we are committed to providing top-quality HVAC services and helping you understand how to maximize your HVAC system for a healthier and more comfortable indoor environment. You can trust us to guide you every step of the way, from product selection to installation and maintenance.