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Beat the Heat: Your Ultimate Guide to Air Conditioning Pt. 2

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Canada is famous for its intense weather, brutal winters, and sweltering, sticky summers. While enjoying time outside, we also recognize the value of a cozy and welcoming indoor space. This is where air conditioning plays a significant role. 

It is essential to select the appropriate size of air conditioner for your house to optimize energy usage, maintain ideal temperature conditions, and keep your family comfortable during the hot months.

Continuing from part one, in this article, we’ll walk you through the process of selecting the perfect air conditioner for your Canadian home.

Step 1: Calculate the Size of Your Space

When selecting the appropriate air conditioner, start by figuring out the size of the area that needs cooling. To do this, take measurements of each room’s length, width, and height and then multiply these numbers to find the total square footage. 

For instance, a living room that is 15 feet long and 12 feet wide has a square footage of 180 square feet (15 x 12). Perform this calculation for all rooms that require cooling, and then combine the total square footage to get a general idea of your home’s cooling requirements.

Step 2: Consider the Insulation and Building Materials

Not all homes are created equal, and the insulation levels and building materials used in your house will significantly affect the efficiency of your air conditioner. The better insulated your home, the less cooling capacity you’ll need to maintain comfortable temperatures. 

If you have an older home with less insulation, you might need a more powerful air conditioner to compensate for heat loss. Additionally, homes with large windows, high ceilings, or sun-facing rooms require greater cooling capacity to keep temperatures comfortable.

Step 3: Determine the Required Cooling Capacity

Once you’ve assessed the dimensions of your area and the elements influencing insulation, it’s crucial to figure out the cooling capacity for your air conditioner. British Thermal Units (BTUs) typically quantify cooling capacity per hour. As a rough guideline, 20 BTUs are needed for every square foot of living space.

However, this is just a starting point. You’ll also need to consider other factors, such as the number of occupants, heat-generating appliances, and the outside temperature. 

For example, add 600 BTUs for each additional person in the household and 4,000 BTUs for a kitchen or laundry room. In addition, you may need to adjust to the climate in your area. You may need more cooling capacity per square foot in hotter regions than the 20 BTU guideline.

Step 4: Choose the Right Type of Air Conditioner

Selecting the appropriate air conditioner to ensure a pleasant home temperature and minimize energy expenses is crucial. The ideal AC system relies on various factors, such as the size and design of your home and your individual preferences. Refer to the first part of this series to explore the various AC models available.

Step 5: Consult with a Professional

Of course, it is wise to seek advice from an HVAC expert when selecting the appropriate air conditioning system for your house. These professionals can evaluate your home’s distinct features, suggest the most suitable system for your requirements, and ensure correct installation and upkeep. 

A properly installed and maintained air conditioner will offer maximum comfort and help you save on energy expenses over time.


Choosing the right size air conditioner for your Canadian home is crucial for ensuring your family’s comfort during the hot summer months. By following the steps outlined in this blog section, you’ll be well on your way to selecting the perfect air conditioner for your needs. 

And remember, consulting with an HVAC professional is always a wise decision to ensure the best possible outcome for your home’s cooling system.

If you’re looking for AC maintenance in Mississauga, we can help you. Furnace Home King Services is a heating and cooling company that puts its customers first! With over 43 years of experience, you can count on us to recommend the best for your space. Start today by getting a quote online!