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Étude de cas : l’immeuble de bureaux qui a doublé sa productivité grâce à un nouveau système de ventilation
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Case Study: The Office Building That Doubled Its Productivity Thanks to a New Ventilation System

A custom ventilation project that transformed daily professional life

In the competitive sector of office buildings in Montreal, indoor comfort and air quality are no longer luxuries but concrete performance drivers. It was in this context that a property manager from downtown Montreal called on AirGreen to completely modernize the building’s ventilation system. The goal: to provide a healthier work environment, reduce absences related to air quality, and increase tenant productivity. The result? A spectacular transformation supported by a high-efficiency air exchanger perfectly suited to the building’s needs.

A building in the heart of Montreal facing indoor air problems

The project involved a five-story office building housing about ten companies in the technology and services sector. Although recently renovated aesthetically, the building suffered from an obsolete ventilation system unable to ensure effective air renewal. Several complaints had been reported: persistent odors, high humidity levels, CO₂ concentration above standards, frequent headaches, increased fatigue.

We were therefore called to conduct a complete HVAC audit, analyze airflow rates, identify stagnation zones, and propose a centralized air exchanger solution that is both energy-efficient and high-performing.

System choice: energy efficiency, reliability, and adaptability

After assessing the needs, we recommended installing a Venmar EVO5 700 HRV air exchanger, a model known for its energy efficiency above 75%, reliability under intensive use, and compatibility with the commercial home automation systems already in place in the building.

Technical specifications of the installed machine:

  • Model: Venmar EVO5 700 HRV

  • Airflow: 700 CFM

  • Noticeable efficiency: 75 to 81% depending on outside temperature

  • Ultra-efficient ECM motors

  • Built-in MERV 13 filters to capture pollutants and allergens

  • Programmable digital wall control

  • Certifications: Energy Star®, CSA, Certified for the Canadian climate

This model allowed for constant air exchange, even in winter, while recovering energy from the exhausted air to heat the incoming fresh air. A solution perfectly suited to the climatic rigors of Montreal.

A complex technical installation, but perfectly mastered

The installation was not without challenges. It required:

  • Install the system without interrupting tenant business activities.

  • Reuse existing ducts while optimizing air distribution across the five floors.

  • Plan for easy access for regular HVAC maintenance.

Our teams worked over two consecutive weekends, in collaboration with the building managers, to ensure a quick and silent installation, without disturbing users. The new system was integrated into the main mechanical room, with secondary ducts to each floor, regulated by intelligent motorized valves.

Measurable results: increased productivity, tenant satisfaction

Results were visible from the first week:

  • Improved air quality according to CO₂ sensors installed on each floor.

  • Reduction of odors and humidity in meeting rooms and enclosed spaces.

  • 38% decrease in complaints related to thermal or odor discomfort.

  • According to the property manager, several tenant companies noted a productivity increase and a reduction in absences due to headaches and fatigue.

Grants that facilitated the investment

Thanks to the eco-energy nature of the project and our support, the client was able to benefit from several grants available in Montreal and on the South Shore:

  • Rénoclimat Program for commercial buildings: up to 20% of the installation cost reimbursed.

  • Municipal grants from the City of Montreal for improving indoor air quality.

  • Support from AirGreen for preparing technical documents and forms.

The AirGreen approach: a trusted partner for your HVAC projects

At AirGreen, we don’t just install HVAC systems. We support our clients from A to Z:

  • Needs assessment and personalized recommendations.

  • Selection of optimal equipment (adapted to the structure and budget).

  • Clean, fast installation supervised by certified technicians.

  • Preventive HVAC maintenance and long-term maintenance plans.

  • Comprehensive management of government grants.

We have already completed similar projects in Laval, Longueuil, Brossard, Blainville, and on the North Shore, with equally convincing results.

Practical advice for office building managers

Here are some tips if you’re considering improving your ventilation system:

  1. Measure CO₂ levels to detect stale air problems.

  2. Don’t rely solely on air conditioning or heating: ventilation is an essential component of comfort.

  3. Choose Energy Star models compatible with the Quebec climate.

  4. Plan regular maintenance to ensure performance and longevity.

  5. Call on commercial HVAC specialists with field experience.

Concrete proof that ventilation goes hand in hand with performance

This example proves that effective ventilation is not just a luxury, but a strategic investment for property managers looking to maximize their spaces, retain tenants, and contribute to public health improvement.

At AirGreen, we believe every project deserves a personalized solution, combining technical expertise, installation precision, and impeccable after-sales service.

If you are located in Montreal, Laval, Longueuil, on the North Shore or the South Shore, and you manage a building that could benefit from improved ventilation, contact us now for a free evaluation.

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