An essential comparison for homes in Montreal, Laval, Longueuil, the North Shore, and the South Shore
As energy efficiency becomes a priority for many homeowners, it’s crucial to choose the right air conditioning system that fits your needs. Between a wall-mounted air conditioner (often called a heat pump when it’s reversible) and a portable air conditioner, the question of energy consumption often arises. At AirGreen, as HVAC experts in the Greater Montreal area, we frequently receive inquiries from customers who are torn between these two options.
Here, we provide a detailed analysis, illustrated by real-life examples from our on-the-ground experience, to help you make an informed choice that is both economically and ecologically smart.
Design differences: a major factor in energy consumption
How the wall-mounted air conditioner works
The wall-mounted air conditioner is a fixed system, consisting of an indoor unit and an outdoor unit that requires professional installation. It operates with a compressor and refrigerant, often of the latest generation like R-32 or R-410A, which allows for better thermal efficiency. It’s designed to operate over long periods, often several hours at a time, while maintaining consistent and optimized energy consumption.
How the portable air conditioner works
In contrast, a portable air conditioner is a compact, floor-standing unit usually equipped with a hot air exhaust hose that vents out through a window. Less powerful, it tends to consume more energy to reach a similar temperature in a room. It is generally used on a temporary basis, in situations where installing a fixed system is not possible.
Energy comparison: data and field observations
AirGreen case study in Longueuil: air conditioning for an 800 sq. ft. condo
One of our clients in Longueuil contacted us to replace his 12,000 BTU portable air conditioner, which was deemed too energy-hungry and inefficient. After analysis, we installed a Gree Lomo 12,000 BTU R-32 heat pump, with a seasonal performance rating (SEER) of 23.
Result: his monthly energy consumption dropped by nearly 35%, while maintaining a constant, quiet, and comfortable indoor temperature.
Another case in Laval: real comparison on Hydro-Québec’s bill
In Laval, a homeowner compared his electric consumption data in July 2023 (with a portable air conditioner) to July 2024 (after installing a Fujitsu 15RL2 wall-mounted air conditioner). Despite similar outdoor temperatures, his July 2024 bill was $42 lower, due to increased efficiency and better temperature control.
Evaluating performance: EER and SEER ratings
Wall-mounted air conditioners, particularly those we install at AirGreen (brands like Fujitsu, Gree, Tosot, Haxxair), boast significantly higher EER and SEER ratings than portable air conditioners.
| Type of Air Conditioner | Average EER | Average SEER | Overall Efficiency |
|---|---|---|---|
| 12,000 BTU Portable | 8.5 | 10 | Low |
| 12,000 BTU Wall-mounted | 12-15 | 20-25 | High |
Other factors affecting energy consumption
Insulation and size of the space
A well-insulated home allows the wall-mounted air conditioner to operate at a steady and moderate pace. The portable air conditioner, often poorly suited for the space it’s meant to cool, compensates by running more intensely, which increases its energy consumption.
Thermostatic control
The wall-mounted units we install are smart and programmable, allowing for more precise cycles of operation and significant savings. Portable units are more rudimentary and less responsive to temperature fluctuations.
Legislation, subsidies, and financial assistance
In several cities such as Montreal, Laval, and the South Shore, installations of high-efficiency wall-mounted air conditioners are eligible for government subsidies, such as Hydro-Québec’s LogisVert program. In contrast, portable air conditioners are not eligible for any financial aid, as they are considered too energy-consuming.
Environmental impact: a local and global issue
Use of next-generation refrigerants
Modern wall-mounted air conditioners, like those using R-32, have a lower global warming potential (GWP) than older systems or portable units using outdated technologies.
Durability and carbon footprint
The average lifespan of a wall-mounted air conditioner is about 12 to 15 years, compared to 5 to 7 years for a portable model. In the long run, this results in fewer replacements, less waste, and a better environmental footprint.
Practical advice for choosing the right system
-
Always prioritize a fixed installation if your home allows it: it’s more cost-effective in the long run.
-
Consult our AirGreen experts to assess the required power for your spaces.
-
Check the SEER and EER ratings before purchasing, and prioritize systems that are eligible for subsidies.
-
Don’t be tempted by the low initial cost of a portable unit: the long-term cost is often higher.
Why trust AirGreen?
At AirGreen, we’ve installed over 3,000 wall-mounted air conditioners across Montreal, Laval, Longueuil, the North Shore, and the South Shore. We offer a turnkey approach: consultation, subsidies, fast installation, and personalized after-sales service.
Our technical team is certified and specialized in installing high-efficiency HVAC systems perfectly suited to the realities of Quebec’s climate.
Conclusion
The wall-mounted air conditioner far outperforms the portable air conditioner in terms of energy consumption, comfort, durability, and environmental impact. It represents a smart investment, especially when accompanied by available subsidies in Quebec. At AirGreen, we are proud to advise, assist, and install solutions that sustainably improve your comfort while reducing your energy costs.
Contact us today for a free quote and discover how an eco-friendly wall-mounted air conditioner can transform your daily life.