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Étude de cas AirGreen : comment nous avons divisé par deux les coûts énergétiques d'un complexe résidentiel à Montréal grâce à la climatisation
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AirGreen Case Study: How We Halved the Energy Costs of a Residential Complex in Montréal with Air Conditioning

Centralized Air Conditioning: A Winning Strategy for Large Residential Complexes

In a context where reducing energy costs has become a priority for both property owners and building managers, air conditioning should no longer be seen as just an expense, but as a powerful tool for energy optimization. This case study conducted in Montréal by our AirGreen team is clear proof: thanks to a custom HVAC solution, we helped a 48-unit residential complex reduce its energy costs by 50%, while significantly improving occupant comfort.

The context: outdated equipment and soaring bills

The client, a manager of a residential building located in the Rosemont–La Petite-Patrie area of Montréal, reached out to us due to growing complaints from tenants: excessive heat in summer, poor air circulation, constant ventilation noise, and most importantly, a sharp rise in energy costs, despite seemingly stable consumption.

The existing system was a set of old window air conditioners combined with an inefficient central ventilation system. In addition to being energy-hungry, the setup lacked uniformity, leading to random hot and cold spots, making it uncomfortable and unsatisfactory for the tenants.

Our solution: a MIDEA EVOX G3 10-ton heat pump, eco-friendly and eligible for grants

After a complete thermal analysis of the building, we chose to install a MIDEA EVOX G3 central heat pump | 10 tons, paired with a optimized air distribution system with zonal control. This choice was driven by several key factors:

  • DC Inverter Technology: allows for fine modulation of power according to actual demand, avoiding consumption peaks.

  • R-32 Refrigerant: more eco-friendly than R-410A and offers better thermal efficiency.

  • Seasonal Efficiency (SEER 18 / HSPF 10): perfectly meets energy standards in Québec.

  • Compatibility with the LogisVert program: the installation enabled the client to secure a $4,320 grant.

The installation process: controlled logistics, tangible results

Given the size of the building and the importance of the project, our team planned the intervention in several stages, ensuring no service disruption for the tenants:

  1. Progressive removal of the window air conditioners, recycling the units.

  2. Installation of flexible air ducts in the false ceilings to minimize invasive work.

  3. Installation of the MIDEA EVOX G3 central heat pump on the building’s roof with a self-supporting structure.

  4. Integration of smart thermostats in each unit, allowing tenants individual control.

Thanks to this meticulous planning, the project was completed in just 12 business days, without generating complaints or major disruptions.

The results: measurable gains and immediate feedback

Three months after installation, the results were already evident:

  • 52% reduction in cooling costs compared to the previous summer.

  • Significant comfort improvement according to 88% of the surveyed tenants.

  • Reduction in ambient noise due to the removal of window units.

  • Property value increase estimated at +4% based on a post-project evaluation.

Why this case study confirms our HVAC expertise in Montréal

This project perfectly embodies our approach at AirGreen:

  • Thorough analysis of the building’s real needs.

  • Strategic choice of a modern, reliable, high-performance heat pump.

  • Artfully executed installation, with no disruption to occupants.

  • Expert management of grant programs, simplifying the client’s decision-making process.

But most importantly, we were able to turn a problematic situation into a sustainable opportunity for savings and comfort, enhancing the reputation of our client while reducing their carbon footprint.

Advice for property owners and managers: transform your energy costs into investments

  • Have your current HVAC system inspected to assess energy losses.

  • Opt for central heat pumps with high efficiency, eligible for current subsidies in Montréal, Laval, Longueuil, Rive Nord, and Rive Sud.

  • Prioritize zoned installations, offering better comfort at lower costs.

  • Trust specialized installers like AirGreen, who guide you through every step.

Conclusion: Investing in the right air conditioning system is also an investment in tenant satisfaction

The example of this residential complex in Montréal shows that replacing an outdated system with a modern centralized HVAC solution can have an immediate impact on both profitability and comfort. At AirGreen, we focus on designing, installing, and maintaining durable, efficient, and customized air conditioning systems for every building, no matter its complexity.

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