Expert solutions and decisive interventions: our daily routine in the commercial air conditioning field in Montréal
In the world of commercial air conditioning, a design, installation, or maintenance error can have disastrous consequences for a business. Lost revenue due to customer discomfort, overheating equipment, or skyrocketing utility bills from excessive energy use—these are just some of the critical situations we at AirGreen deal with every week across Montréal, Laval, Longueuil, the North Shore, and the South Shore.
Our role goes far beyond simply installing equipment. We’re often called in as emergency responders when faulty systems threaten a business’s productivity or reputation. Thanks to our expertise, our tailored approach, and our deep knowledge of the HVAC industry, we’ve built a strong reputation as commercial air conditioning lifesavers. Here’s how we do it.
When air conditioning becomes a nightmare for business owners in Montréal
A sizing mistake: a typical issue we fix all the time
One of the most common problems we see is poorly sized air conditioning systems. That was the case for a restaurant on Plateau-Mont-Royal, whose owner contacted us after a project led by an inexperienced installer failed. The system—a 18,000 BTU wall-mounted residential air conditioner—couldn’t cool a 120-square-meter dining area with an open kitchen.
The result? Overheating in the dining room, uncomfortable customers, a system running non-stop without ever reaching the desired temperature, and worst of all, premature wear and tear on the unit.
We quickly evaluated the actual needs, taking into account volume, internal loads (kitchen, electrical equipment, sunlight), and foot traffic. The solution: replace the undersized system with a 60,000 BTU Daikin Rooftop commercial heat pump, with appropriate ventilation and smart controls for maximum efficiency.
The consequences of poor HVAC installation: more common than you think
The critical role of ventilation in businesses and offices
A medical clinic in Laval contacted us after noticing persistent odors and stale air, despite having recently installed a central air conditioning system. Upon inspection, we found that the ventilation system had never been properly connected. No extraction of stale air, no intake of fresh air—a completely incomplete HVAC installation.
Our teams designed a custom ventilation system with an energy recovery ventilator (ERV), ensuring optimal air renewal, better indoor air quality, and improved comfort for both staff and patients. Fixing this kind of issue has become one of our specialties.
Why you should call AirGreen before choosing a commercial air conditioning system
A full analysis before any installation
Before making any recommendations, our experts conduct a comprehensive technical assessment, including:
-
Heat load calculations (BTUs)
-
Occupancy flow analysis
-
Solar gain evaluation
-
Inspection of existing ventilation
-
Grant eligibility checks (e.g., energy efficiency programs from the government)
With this approach, we save our clients from unnecessary expenses, systems that don’t fit their needs, and installations that don’t meet current building codes or HVAC standards in Québec.
Case study: a Longueuil bakery saved from disaster
An artisanal bakery on the South Shore, equipped with an outdated central air conditioner, experienced frequent breakdowns during the summer. The previous contractor had installed a residential-grade unit that couldn't handle the long operating cycles required in a commercial setting.
Our diagnosis: mismatched system, poor air distribution, undersized filters, and no zoning between the kitchen and customer areas.
Our solution:
-
Installation of a Mitsubishi City Multi VRF system, perfect for variable loads
-
Addition of zone-specific diffusers
-
Smart centralized control system to maximize performance and reduce costs
The result: optimal comfort, zero breakdowns since our intervention, a 28% drop in energy costs, and happy customers.
Mistakes to avoid in commercial air conditioning
What we see far too often
-
Using residential units in commercial spaces
-
Ignoring ventilation and relative humidity
-
Skipping preventive maintenance
-
Choosing solely based on upfront price
-
Installing without permits or building code compliance
At AirGreen, we regularly correct these mistakes, which can be costly for businesses. That’s why we stress the importance of working with a qualified HVAC partner, properly certified and with real-world commercial experience.
Our proven expertise across Greater Montréal
For over 10 years, we’ve installed and repaired HVAC systems in:
-
Restaurants in downtown Montréal
-
Warehouses in Laval
-
Daycares on the North Shore
-
Medical clinics in Longueuil
-
Retail stores on the South Shore
Each time, our personalized approach, precision in execution, and attentive after-sales service make all the difference.
Why choose us for your commercial air conditioning needs
Concrete advantages of AirGreen
-
Certified and highly trained technical team
-
Unbiased advice tailored to your industry
-
Access to the best commercial brands (Daikin, Lennox, Mitsubishi, York, Fujitsu, Gree, etc.)
-
Support with securing available Québec energy-efficiency grants
-
Full-service commercial HVAC maintenance, with customizable contracts
-
Rapid response across the Greater Montréal region
In conclusion, what we offer goes far beyond simply installing an air conditioner. At AirGreen, we protect your investment, your comfort, and your business performance by avoiding the common mistakes that affect so many companies. Our mission: to deliver a reliable, high-performance, and long-lasting HVAC solution, tailored to your specific commercial needs.
Contact us today for a comprehensive evaluation of your commercial air conditioning project.