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7 questions to ask yourself before installing a wall-mounted air conditioner in the Montréal area

Plan your wall-mounted air conditioner installation in Montréal properly: the 7 key questions to ask

Investing in a wall-mounted air conditioner is an important decision—not only for thermal comfort but also for long-term energy savings. At AirGreen, we know that a successful installation relies just as much on choosing the right unit as on proper planning. Before calling in an installer in the Greater Montréal area, it’s essential to ask the right questions. Here’s our comprehensive guide to help you avoid costly mistakes and get the most out of your new system.

What is the size of the area to cool, and what are the specific characteristics of my space?

Sizing a wall-mounted air conditioner isn’t just about square footage. Many factors come into play, such as:

  • Sun exposure

  • Quality of insulation

  • Number of floors or zones to cover

  • Ceiling height

  • Internal heat sources (appliances, electronics, etc.)

For example, in a condo in Longueuil recently renovated by our team, a 12,000 BTU unit proved insufficient due to a large south-facing window. We replaced it with an 18,000 BTU Gree Lomo+, with immediate improvements in both comfort and performance.

Which model should I choose based on my needs and budget?

Wall-mounted air conditioners vary greatly depending on:

  • The brand (Fujitsu, Gree, Tosot, Midea, Sharp, etc.)

  • Noise level

  • Energy efficiency ratings (SEER / HSPF)

  • Smart features (Wi-Fi, scheduling, motion sensors, etc.)

At AirGreen, we always recommend Energy Star certified models, which qualify for grants and reduce energy consumption. For instance, a Sharp ZU1 15,000 BTU recently installed in Laval offers excellent efficiency (SEER 23, HSPF 12) and ultra-quiet operation—perfect for a master bedroom.

Am I eligible for a grant?

There are several financial assistance programs in Québec, such as Hydro-Québec’s LogisVert program, which can cover up to $1,860 of the installation cost for an energy-efficient wall-mounted air conditioner.

We guide our clients through every step of the eligibility process, from quote to final documentation. In Sainte-Julie, for example, a customer received the maximum rebate thanks to the installation of a Gree Extreme 24,000 BTU wall-mounted air conditioner that met the program’s efficiency requirements.

Where should the indoor unit be installed?

The right placement of the indoor wall-mounted unit directly impacts air distribution and overall comfort. At AirGreen, we perform a complete thermal analysis of your home before recommending the optimal location.

Avoid obstructed areas or spots too close to heat sources. In Montréal, in a loft-style apartment, we had to install the unit high up due to cathedral ceilings. The result: consistent cooling with no direct drafts.

What are the constraints for the outdoor unit?

The outdoor unit needs a clear, stable area that complies with municipal regulations (noise levels, distance from property lines, etc.). We typically use wall brackets or concrete slabs, along with anti-vibration systems.

In a duplex in Montréal-Nord, installation on a brick wall required structural reinforcement and soundproofing treatment to avoid neighbor complaints. At the client’s request, our technicians also installed a decorative cover to conceal the conduits.

What are the steps in the installation process?

Here’s how we do it at AirGreen:

  1. Free in-home thermal evaluation.

  2. Recommendation of suitable models.

  3. Detailed quote with or without grant options.

  4. Flexible scheduling, including evenings and weekends.

  5. Same-day installation, with complete performance testing.

  6. Walkthrough on how to use the system.

  7. Submission of documents for available grants.

Each project is unique. On the North Shore, in a century-old home in Blainville, we had to extend the condensation drain over several meters and route it through a stone basement—all while preserving the building’s integrity.

What after-sales service is offered?

A quality wall-mounted air conditioner deserves regular maintenance to ensure long-lasting performance. At AirGreen:

  • We offer an annual HVAC maintenance service, including cleaning, gas check, pressure testing, and calibration.

  • Our emergency service is available 7 days a week during heat waves.

  • We also offer maintenance contracts at discounted rates for both residential and commercial clients.

In Brossard, one of our commercial clients receives quarterly maintenance, which allowed us to detect a clogged filter before it impacted the energy efficiency of the entire building.

Practical tips before signing a contract

  • Always request a personalized evaluation.

  • Confirm your grant eligibility before purchasing.

  • Choose certified installers like AirGreen, who are familiar with municipal regulations in each borough.

  • Opt for a reputable brand covered by a manufacturer’s warranty.

  • Ask for a detailed and transparent quote, with no hidden fees.

AirGreen: your trusted HVAC expert in Greater Montréal

For over 10 years, AirGreen has supported thousands of households and businesses in Montréal, Laval, Longueuil, the North Shore, and the South Shore with their wall-mounted air conditioning projects. Thanks to our technical expertise, responsive customer service, and local knowledge, we’re the ideal partner for a high-performance, long-lasting, and energy-efficient installation.

Thinking of installing a wall-mounted air conditioner?

Contact us today for a free in-home evaluation, and benefit from complete support—from equipment selection to securing your grants. At AirGreen, we do more than sell HVAC systems—we genuinely improve your daily comfort.