Les échangeurs d'air fonctionnent-ils en hiver?
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Do air exchangers work in winter?

Air Exchangers in Winter: Do They Work?

AirGreen, Montreal’s leading HVAC company, understands the critical role of an air exchanger in maintaining indoor air quality and controlling humidity levels within the home. However, a question we often encounter is, "Do air exchangers work in the winter?" This article seeks to comprehensively answer this question while detailing the benefits and functionality of an air exchanger during the colder months.

Understanding Air Exchangers

Air exchangers are vital components of an efficient HVAC system, allowing the regulation of air flow within a building to ensure a constant supply of fresh, clean air while expelling stale air. They also maintain humidity levels and help reduce the presence of indoor pollutants.

Air Exchangers and Winter Months

Yes, air exchangers do work in the winter. In fact, they are even more critical during these colder months. Here's why:

  1. Improved Indoor Air Quality: During winter, homes are often closed to keep the cold out, which can result in stale and poor-quality indoor air. An air exchanger efficiently replaces this stale air with fresh, outdoor air.
  2. Moisture Control: Winter often brings increased indoor humidity due to activities like cooking, showering, and even breathing. An air exchanger helps control this humidity, reducing the risk of mold growth and other moisture-related problems.
  3. Energy Efficiency: Modern air exchangers come equipped with heat recovery capabilities. They can extract the heat from the stale air leaving the house and use it to preheat the fresh air coming in, saving on heating costs.

The Functionality of Air Exchangers in Winter

Here's a closer look at how air exchangers function during winter:

  1. Heat Recovery Ventilation (HRV): HRV systems are designed to exchange indoor air with fresh outdoor air, while also recovering the heat from the outgoing air. In winter, this means that the warmth from your home isn't wasted but used to preheat the incoming cold air.
  2. Elimination of Condensation: The humidity regulation by the air exchanger helps eliminate excess moisture that could condense on your windows and other surfaces, helping to keep your home dry and comfortable.


Not only do air exchangers work in winter, but they also play a pivotal role in maintaining your indoor air quality, controlling humidity, and contributing to energy efficiency. As Montreal's leading HVAC company, AirGreen is committed to delivering high-quality air exchanger solutions to ensure the comfort of your home, no matter the season.