When it comes to installing wall-mounted air conditioners in the winter, several questions arise. One of the most common concerns among our clients in Montréal, Laval, Longueuil, as well as on the North Shore and South Shore, is whether a wall-mounted air conditioner can be installed or used when the temperature drops to -20 °C. This is a valid question that deserves a detailed and well-informed answer so you can make the best decision for your year-round comfort.
Understanding how a wall-mounted air conditioner works in winter
Wall-mounted air conditioners, especially heat pumps, are designed to provide both cooling in the summer and heating in the winter. However, their performance can be affected by extremely low outdoor temperatures. In this article, we’ll explore whether a wall-mounted unit can be installed and operated when it’s as cold as -20 °C, and what factors you should consider before moving forward.
Installing wall-mounted air conditioners in winter: a challenge for professionals
Installing a wall-mounted air conditioner in winter is not impossible, but it does involve some technical challenges that need to be clearly understood. When installing a wall-mounted unit in freezing conditions, several critical elements must be taken into account.
1. Meeting safety and efficiency standards
Safety and energy efficiency standards are essential when installing a wall-mounted air conditioner in an environment where temperatures can drop below freezing. For outdoor installations, it’s crucial that all components are properly insulated—especially pipes and electrical connections—to prevent freezing and system failure. At AirGreen, we make sure all wall-mounted units are installed in full compliance with these standards, even in the harshest winter conditions.
2. The impact of cold temperatures on the equipment
Wall-mounted air conditioners and heat pumps can struggle to perform at temperatures below -15 °C to -20 °C. This is often due to the refrigerant fluid becoming less effective in extreme cold, reducing the system’s heating efficiency. However, certain brands like Fujitsu, Gree, and Bosch offer models specifically engineered to withstand lower temperatures, ensuring optimal performance even in winter.
Can you use a wall-mounted air conditioner at -20 °C?
Using a wall-mounted air conditioner in winter is certainly possible, but it depends on the specific unit and how well it’s maintained. Here are a few key considerations before turning your unit on when it’s extremely cold.
1. Modern heat pumps built for extreme cold
Today’s modern heat pump systems—especially those from Fujitsu and Bosch—are designed to function efficiently even when temperatures drop to -20 °C. These units are equipped with advanced technology that helps maintain high performance during winter. By choosing the right model, you can enjoy comfortable heat even when the thermometer plunges below zero. However, it’s critical to hire a professional installer to ensure the outdoor unit is properly positioned and protected from the elements.
2. Proper maintenance is key
Regular maintenance of your wall-mounted air conditioner is essential—especially in the winter months. A poorly maintained system can experience issues during extreme cold. It’s important to clean the filters, inspect the piping, and ensure the defrost system is working correctly. At AirGreen, we strongly recommend a pre-winter inspection of your equipment to avoid unexpected breakdowns when the cold hits.
3. Minimizing freezing risks
As temperatures fall, the risk of freezing within the pipes and refrigerant fluid increases. Fortunately, many newer air conditioner models are equipped with automatic defrost systems that help maintain proper operating temperatures. For older units or those without this feature, it may be necessary to install anti-freeze protection devices to avoid damage. At AirGreen, we always recommend a full check-up before the cold season begins.
The benefits of installing a wall-mounted air conditioner in winter
Despite the challenges, there are plenty of advantages to installing a wall-mounted air conditioner during the winter months—especially in the Greater Montréal area and surroundings.
1. Improved energy efficiency
Modern wall-mounted air conditioners, especially those using R-32 or R-454b refrigerants, offer significantly better energy efficiency than older models. This leads to substantial savings on your energy bills throughout the year. Installing a wall-mounted unit during winter means you’re ready ahead of time for summer, while also enjoying economical heating throughout the colder months.
2. Year-round comfort
Wall-mounted air conditioners are not just for summer cooling. They also provide excellent winter heating, producing soft, even heat—perfect for keeping your indoor temperature pleasant even on the coldest days. A winter installation ensures you can enjoy continuous use of your system year-round without interruptions.
3. Available rebates for installing wall-mounted air conditioners
In Québec, several financial incentives are available for wall-mounted air conditioner installations, including grants from Hydro-Québec. These rebates can be particularly beneficial in winter, helping lower your upfront costs while improving your home's energy efficiency. That’s why winter is often an ideal time to schedule your installation and maximize your savings.
Conclusion
In summary, installing and using a wall-mounted air conditioner in temperatures as low as -20 °C is not only possible but can be very effective—provided you choose the right model and work with experts like AirGreen. Thanks to modern technology and cold-climate capable units—along with regular preventive maintenance—you can enjoy year-round comfort. If you're located in Montréal, Laval, Longueuil, or on the North Shore or South Shore, don’t hesitate to reach out to us to discuss installing a reliable, high-performance wall-mounted unit that meets your needs—even in the heart of winter.