Choosing the right air conditioner starts with one question: which type of AC is best for your home?
For most Canadians, the choice comes down to three options:
- Portable air conditioners – Best for renters, condos, or anyone who wants a quick, no-permanent-installation cooling solution.
- Window air conditioners – Best for homeowners or renters who are allowed to install a window unit and want efficient cooling for a single room.
- Mini-split air conditioners – Best for homeowners looking for a permanent, quiet, and energy-efficient solution for one or multiple rooms.
This buying guide explains how each type of air conditioner works, who it’s best for, what installation involves, and how to choose the right size for your space.
Quick buying guide
| Your situation | Best option |
|---|---|
| You rent and can’t permanently install an AC | Portable air conditioner |
| You want the most efficient way to cool one bedroom | Window air conditioner |
| You want to cool multiple rooms | Mini-split air conditioner |
| You’re still deciding | Read the Portable vs Window vs Mini-Split comparison guide |
Table of contents
- What is an air conditioner?
- Types of air conditioners
- Choosing the right size air conditioner
- What are BTUs?
- What to look for in an air conditioner
- Energy efficiency in Canada
- Installation of an air conditioner
- FAQs
What is an air conditioner?
An air conditioner removes heat and humidity from indoor air to help keep your home comfortable during warmer months. While some homes have central air conditioning, many Canadians rely on portable, window, or mini-split air conditioners to cool individual rooms or specific areas of the home. Choosing the right type depends on your space, budget, and whether you rent or own your home.
Types of air conditioners
| Type | Best for | Installation | Can you move it? |
|---|---|---|---|
| Portable AC | Renters, condos, temporary cooling | Easy | ✔ Yes |
| Window AC | Single rooms, best efficiency | Moderate | ✖ No |
| Mini-split AC | Homeowners, multiple rooms | Professional | ✖ Permanent |
If you’re looking to buy an air conditioner to cool a room in the home, you’ll probably be deciding between three main options: a portable air conditioner, a window air conditioner, and a mini split air conditioner. All three have their pros and cons and are optimal for different situations.
Portable air conditioners
A portable air conditioner is a floor-standing appliance that uses air from within the room to cool the area and exhausts air out from a hose that’s mounted at the window using an included window venting kit. Some models include a self-evaporating function that will recycle condensation back into the air, while others require drainage of water. There are also dual-hose models that include one hose to bring air inside from the outdoors, then run it out through the window, and a second hose that exhausts heated air out. Some can also vent air out through a drop ceiling or through a wall.
A model with a hose will come with a window vent kit that can fit right onto your window opening to expel the air. Those that don’t have a hose require simply that you plug them in and go. But you will need to empty water periodically from a reservoir of some kind. How often will depend on how humid the air is in your room. The most hassle-free option is a more advanced self-evaporating model since they are easy to set up and require very little if any, maintenance.
This review of the popular Insignia 3-in-1 portable air conditioner could be helpful.
Advantages of a portable air conditioner
Portable air conditioners are a great option for many, and they have some advantages over other types.
- You can move them from room-to-room
- Can be used in rooms without windows
- Easy to set up
Disadvantages of a portable air conditioner
There are some things you need to take into consideration before opting for a portable AC.
- They take up a lot of space
- They aren’t as effective for cooling larger spaces
Window air conditioners
By contrast, a window air conditioner is installed right into a standard-sized window opening, exhausting hot air outside and bringing cool air in. They’re much smaller, and more unobtrusive in design.
Is a window air conditioner better than a portable air conditioner?
If you’re allowed to install one, a window air conditioner is generally more energy efficient than a portable air conditioner because the compressor sits closer to the outdoors and less cooled air escapes from the room.
A window AC is usually the better choice if:
- you’re cooling one room all summer
- your home has a compatible window
- your condo or rental allows window units
- you want lower energy costs
A portable AC is usually the better option if you need to move the unit between rooms or your building doesn’t allow window installations.
Advantages of a window air conditioner
Window air conditioners are compact, generally quieter than portable units, and often cost less while providing better cooling efficiency for a single room.
Disadvantages of a window air conditioner
Window units require a compatible window, are less portable, and may not be permitted in some condos or rental properties.
Choosing the right window air conditioner
| Room size | Recommended cooling capacity |
|---|---|
| Up to 150 sq. ft. | 5,000–6,000 BTU |
| 150–250 sq. ft. | 6,000–8,000 BTU |
| 250–350 sq. ft. | 8,000–10,000 BTU |
| 350–450 sq. ft. | 10,000–12,000 BTU |
Window AC installation considerations in Canada
Window air conditioners work best in standard vertical sash windows and may require a support bracket for larger models. Before purchasing, check your condo bylaws or rental agreement, as some buildings prohibit exterior-mounted window units. Proper weather sealing around the installation also helps improve cooling efficiency and reduce energy loss.
Mini split air conditioners
The third main type of air conditioner to consider for your home is a mini split air conditioner, also known as a wall air conditioner. These offer both cooling as well as heating, so you can switch between the two as needed. Especially good for large spaces, they come in two parts. There’s a long, rectangular unit that handles the evaporation of air. It’s usually installed on the wall or by the ceiling. The second piece is an outdoor compressor or condenser that looks like a similar central AC unit, sitting on the ground outside or mounting to a bracket on the side of the house. The two connect to one another via conduit run through the wall.
When does a mini-split air conditioner make sense?
A mini-split air conditioner is usually worth considering if:
- you own your home
- you want year-round heating and cooling
- you want to cool multiple rooms
- you don’t want to block windows
- energy efficiency is your priority
While mini-split systems cost more upfront than portable or window air conditioners, they typically use less electricity over time and offer quieter operation.
What does mini-split installation involve in Canada?
Mini-split systems require professional installation because refrigerant lines and electrical connections must be installed between the indoor and outdoor units.
Depending on where you live in Canada, permits or inspections may also be required for electrical work. Installation costs vary depending on the home and complexity of the project, so it’s worth budgeting for both the unit and professional installation.
Advantages with a mini split air conditioner
Mini split air conditioners can be the perfect choice for a certain selection of households and homeowners.
- Extremely energy efficient
- Quiet
- Heats and cools
- Great for multiple rooms
Disadvantages with a mini split air conditioner
- Highest upfront cost
- Professional installation required
- Permanent installation
Choosing the right size air conditioner
When deciding on the type of air conditioner you want, it’s also important to consider the physical size of the unit. We discuss how to properly size your air conditioner in this handy guide, but here’s a rundown of some of the most important considerations to make.
- Ceiling height
A room with a higher ceiling means there’s more air volume to circulate, which could impact the type of air conditioner you buy. In this case, you might want to opt for a larger air conditioner, a mini split AC, or even consider opting for a ceiling fan to complement the AC and better circulate the air throughout the entire space.
- Room size
The room size itself will determine first which type of air conditioner you want. For smaller rooms, or if you don’t want to use up a lot of floor space, a window AC is a good option. Because they can cool larger rooms as well, you won’t be losing out by going this route. If it’s a larger room with high ceilings, you can consider a mini split AC. For all sizes of rooms, a portable air conditioner can probably work. But you can look at slimmer models if you’re really pressed for space. Just make sure that the BTUs are sufficient enough to cool the room based on its size. (More on this in the section below.) A good trick you can use is to place painter’s tape on the floor where the unit will go based on its stated dimensions to visualize how it will look.
What are BTUs in an air conditioner?
One of the most important things you need to look at when selecting an air conditioner, regardless of the type, is how they work and those important numbers attached to the models.
BTUs
Standing for British Thermal Units, BTUs is the number that measures the amount of heat an air conditioner can remove from the air over a certain period of time, relative to the room’s size. Essentially, the higher the BTUs, the greater capacity the air conditioner has to cool air in a larger room.
So for example, in a 100 square-foot room, a 5,000 BTU air conditioner would suffice to effectively cool it. But getting a 6,000 BTU unit might help further cool down the hallway when his door is left open. Meanwhile, a 14,000 BTU air conditioner can cool a room up to 640 square-feet in size, which is ideal for a main floor living room, or larger basement playroom that tends to get hot in the summer. You can check out the helpful air conditioner sizing chart in this article to determine the appropriate BTU number for your room.
But note that there are new numbers and more accurate measurements to consider beyond just basic BTU.
ASHRAE vs. DOE’s SACC measurements
BTUs can be measured in two different ways: typically by ASHRAE standards (American Society of Heating Refrigerating and Air Conditioning Engineers) and, more recently, DOE’s (Department of Energy’s) Seasonally Adjusted Cooling Capacity (SACC). The ASHRAE figure provides the total number of BTUs that an air conditioner outputs while the revised SACC figure from the DOE accounts for heat generated by the AC unit itself. That, in turn, lowers the total number of BTUs and better represents how cool you’ll actually feel. SACC focuses more on efficiency while ASHRAE reports total cold output.
Thus, an ASHRAE BTU rating for a AC unit might be 10,000 while the SACC figure for the same one is 6,500. A 12,000 BTU air conditioner based on ASHRAE standards is equivalent to 7,500 BTU SACC. Think of it like in the same terms as the rated battery life of a tech device versus the actual battery life. Thus, you might find the SACC figure to be more accurate.
While not all products will include both labels, you can use these stated numbers as a guide. And if the ASHRAE rating alone is stated, just note that the actual rating based on how cool it will make the room will be less. So if you feel you only need a 6,500 BTU AC based on the size of your room, when going by ASHRAE, consider bumping up to one with a 10,000 BTU rating to be certain it works sufficiently and you actually get 6,500 BTUs.
This applies more to portable air conditioners than window ACs since the latter typically pushes warm air outside anyway.
BTU vs SACC: What’s the difference?
If you’re shopping for portable air conditioners in Canada, you’ll often see two cooling ratings:
- BTU (ASHRAE) measures maximum cooling output.
- SACC (Seasonally Adjusted Cooling Capacity) reflects real-world cooling performance and is now the standard used for portable air conditioners sold in Canada and the United States.
Because SACC accounts for heat generated during operation, the number is lower than the traditional BTU rating but provides a more accurate representation of how effectively the unit cools a room.
What to look for in an air conditioner
When deciding on which air conditioner is right for you, there are a few things you should consider, and questions you should ask yourself.
BTUs and size of the room
As mentioned above, look at the BTUs relative to the size of your room to make sure it will do the job effectively.
The size of the room might dictate what type you decide on in another way as well: if the room is small, you might want to go for a window air conditioner that won’t take up too much room. If you have the size to accommodate it, or a small area where it can comfortably sit, you might prefer a portable air conditioner that is easy to set up and get going right out of the box, without any installation. If it’s a large, open-concept space with high ceilings, a mini split AC might make the most sense.
Noise level
You also need to consider things like noise: how loud is it, and will it distract your baby, or a light sleeper? If so, look for one that touts extra-quiet operation. And also make sure a window AC or a portable air conditioner’s exhaust hose set-up will fit properly in your window, especially if your windows are unusually small or large.
Environmental friendliness
Whichever option you choose, look for an Energy Star or other environmental-type rating to ensure not only that it runs efficiently, but that it won’t use too much electricity, and cause a massive jump in your bills.
Ease of installation and maintenance
If you don’t want to have to be constantly draining out the water, look for a model with a function that will evaporate the water and recycle it back into the air, so it’s easy and maintenance-free.
Portable AC units are easy to set up, since you simply plug them in, position the hose to vent out of the window if you get such a model, and you’re good to go. They usually also have easy-to-clean filters. If you want a quick and easy set-up that you can move from room-to-room, consider a unit that collects the water from condensation in a bucket that you need to empty as needed, or a self-evaporating model.
While a mini split AC requires a more intense installation process from the get-go, it requires little to no maintenance after that, making it the easiest to maintain.
Convenience and smart features
You might appreciate having certain convenience features, like a handy remote to adjust the temperature of a portable air conditioner in the living room from the comfort of your couch, or a timer function so you can set it to cool your child’s room overnight, then shut off at 7 a.m. each morning once he’s up for school. Some also have multiple settings to adjust the cool level, which is perfect to toggle as the temperature outside fluctuates.
Many air conditioners nowadays also have smart features, like built-in Wi-Fi, app control, scheduling, voice control, and even the ability to include them in smart home “scenes” so you can turn the lights and AC on along with the music every morning at 8 a.m. automatically, have them shut off at 9 once you head to work, and come back on at 4 so the house is sufficiently cooled by the time you arrive back home for 5.
Also keep in mind that there are some all-in-one portable units that have secondary features as well, like heating and even dehumidifying.
Energy efficiency and rebates for air conditioners in Canada
Choosing an energy-efficient air conditioner can reduce both electricity costs and long-term operating expenses. Many newer models are Energy Star certified, meaning they meet Natural Resources Canada (NRCan) efficiency standards.
Choosing an Energy Star certified air conditioner can lower your electricity costs over time and may qualify you for provincial utility rebates, particularly for eligible heat pump and high-efficiency cooling systems.
| Province | Program |
|---|---|
| Ontario | Save on Energy |
| British Columbia | BC Hydro Power Smart |
| Quebec | Hydro-Québec |
| Alberta | Check current provincial and municipal efficiency programs |
Before purchasing, check your local utility provider to see whether rebates are available for qualifying Energy Star air conditioners or heat pumps.
Installation of an air conditioner
Installation of an air conditioner differs depending on the type of model you get. We’ve covered how to install an air conditioner, but here’s a breakdown.
How to install a window air conditioner
To install a window air conditioner, find a power outlet closest to the window and make sure to power cord reaches. You should avoid plugging it into a power bar. Use a screwdriver or drill to install using the included screws and brackets. You will also find measuring tape handy. Follow the instructions in the booklet. DOn’t forget to install weather stripping to protect the window and prevent air from getting through the sides.
How to install a portable air conditioner
The easiest to install, there are no tools required, though depending on the unit, you might need a simple screwdriver and drill. Find a hard, level surface close enough to the wall and window so the hose can comfortably be vented outside. First, install the window kit; you may need to add filler like plywood or plexiglass if the kit is smaller than the window or conversely, cut it with a utility knife if it’s larger. Attach the hose, plug it in, and enjoy.
How to install a mini split air conditioner
The most complex of installation processes, a mini split AC requires running conduit through the wall so you should seek the assistance of a professional to get this done. Any HVAC specialist should be able to install this unit and can also provide placement advice.
Should you get an AC with dehumidification for your home?
Many portable air conditioners also include a dehumidifier mode that removes excess moisture from the air. This can make your home feel more comfortable during humid Canadian summers while helping reduce musty odours and condensation. If humidity is your main concern, a dedicated dehumidifier may be a better choice for basements or damp rooms.
Will you need accessories for an air conditioner?
Most air conditioners include everything needed for installation. Optional accessories such as replacement window panels, weather sealing kits, covers for window units, or mounting brackets for mini-splits can improve installation and help protect your unit over time.
Which air conditioner is right for you?
| If you… | Choose… |
|---|---|
| Rent your home | Portable AC |
| Own your home and want efficient single-room cooling | Window AC |
| Want permanent whole-home comfort | Mini-split AC |
| Need heating and cooling | Mini-split AC |
| Want the lowest upfront price | Window AC |
| Need to move the unit between rooms | Portable AC |
There are so many things to consider when deciding on an air conditioner. Portable air conditioners are versatile, and usually come with a lot of options, like a timer, multiple settings, and a remote, which make them attractive options, even if they tend to be more expensive. Window ACs might appeal to the budget-conscious person just looking to cool a single room with an unobtrusive design, low maintenance, and little noise. For larger spaces, permanent installation, and heating as well, a mini split AC is about as fitting as you can get.
Continue your air conditioner buying journey
Browse plenty of air conditioner options, including window, portable, and mini split air conditioners at Best Buy Canada.
Looking for more advice before buying?
Learn how to choose the best portable air conditioner for your space.
Compare portable vs window vs mini-split air conditioners to understand which type fits your home.
Read our guide to installing an air conditioner before you buy.
FAQs
What type of air conditioner is best for an apartment in Canada?
The best air conditioner for an apartment depends on your building’s rules and whether you rent or own your home. Portable air conditioners are the most flexible option because they require minimal installation and can move with you. If your apartment or condo allows them, window air conditioners are generally more energy efficient and cool a room more effectively. Homeowners looking for a long-term solution may want to consider a ductless mini-split system.
Is a window air conditioner more efficient than a portable air conditioner?
Yes, in most cases. Window air conditioners are typically more energy efficient because the hot side of the unit stays outside the home, making them better at cooling a room while using less electricity. Portable air conditioners are easier to install and ideal for renters, but they usually consume more energy to achieve the same cooling performance. If you’re deciding between the two, read our guide comparing portable, window, and mini-split air conditioners.
What is the difference between BTU and SACC ratings?
BTU (British Thermal Units) measures an air conditioner’s cooling capacity under ideal testing conditions. For portable air conditioners sold in Canada, you’ll also see a SACC (Seasonally Adjusted Cooling Capacity) rating, which reflects real-world cooling performance by accounting for heat generated by the unit itself. When comparing portable air conditioners, SACC is the more accurate measure of how much space the unit can effectively cool.
Do I need professional installation for a mini-split air conditioner?
Yes. Unlike portable and window air conditioners, mini-split systems require indoor and outdoor units to be connected by refrigerant lines and electrical wiring. Professional installation is recommended to ensure the system operates safely, efficiently, and in accordance with local building codes. Depending on where you live in Canada, permits or inspections may also be required.
Can I install a window air conditioner in a condo or rental?
It depends on your building’s rules. Many condos, strata corporations, and rental properties have restrictions on window air conditioners because of safety concerns or exterior building appearance. Always check your lease agreement or condo bylaws before purchasing a window AC. If window units aren’t permitted, a portable air conditioner is often the best alternative.
Are Energy Star air conditioners worth buying?
For many Canadian households, yes. Energy Star certified air conditioners are designed to use less electricity than standard models while delivering the same level of cooling. They can help lower your energy bills over time, and in some provinces may also qualify for utility rebates or energy-efficiency incentive programs. If you plan to use your air conditioner frequently throughout the summer, an Energy Star model is often worth the investment.
