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Special Report: How Montréal Schools Are Quietly Boosting Student Grades with Air Exchangers

The invisible weapon behind academic success: indoor air quality at the heart of educational performance

It’s not a new curriculum or a change in teaching methods. And yet, academic performance in several Montréal schools has improved significantly in recent years. What parents—and even some teachers—still don’t realize is that this improvement is closely linked to a factor as discreet as it is essential: the installation of high-performance air exchangers.

At AirGreen, we’ve been directly involved in numerous ventilation projects in schools across Montréal, Laval, Longueuil, as well as the North and South Shores. And the findings are clear: clean, well-circulated, and balanced indoor air has a positive impact on student focus, productivity, and even academic success.

Why ventilation in schools is a top priority

Many schools in Québec were built before modern ventilation standards were introduced. They often suffer from:

  • A lack of fresh air, especially in winter

  • Excessively high CO2 levels in closed classrooms

  • Humidity and mold issues in basements or windowless rooms

  • An accumulation of indoor pollutants (cleaning products, construction materials, dust)

This toxic mix creates an environment that directly harms focus and respiratory health. The technical solution exists—quiet but powerful: HRVs and ERVs designed for school environments.

Real case study: High school in Ahuntsic

In Fall 2023, we were commissioned for a full HVAC upgrade in a public high school in Ahuntsic.
Initial findings: sealed classrooms, CO2 levels exceeding 1600 ppm by 9:00 AM, students visibly drowsy by third period.
AirGreen’s solution: Installation of 12 Venmar AVS E15 ECM units, each calibrated individually based on classroom size.
Results after 3 months:

  • CO2 levels consistently under 800 ppm

  • Fewer absences related to headaches and fatigue

  • Improved overall student performance based on interim report cards

How does an air exchanger work in a school?

An HRV (heat recovery ventilator) or ERV (energy recovery ventilator) extracts stale air (rich in CO2, humidity, contaminants) while bringing in fresh, filtered air from outdoors. Its core feature is the ability to recover up to 80% of the thermal energy from outgoing air to warm (or cool) the incoming air.

Key benefits for schools:

  • Immediate improvement in indoor air quality

  • Reduction of airborne viruses and bacteria

  • Thermal stability in rooms without open windows

  • Quiet operation, non-disruptive during class hours

  • Smart programming to match the school day schedule

Brands and models preferred by AirGreen in schools

We carefully select certified models that are quiet, energy-efficient, and capable of handling large air volumes in school buildings.

Examples recently installed:

  • Venmar AVS E15 ECM: ultra-quiet, low energy use, easy to maintain

  • Lifebreath Max Series: high airflow, perfect for gyms and libraries

  • Aldes InspirAIR: smart sensors that automatically adjust airflow based on detected air quality

  • Zehnder ComfoAir Q600: premium solution for new or highly insulated buildings

AirGreen’s approach: proven expertise in institutional settings

Our team specializes in HVAC installations for educational environments, always meeting the highest technical and safety standards:

  1. On-site technical study: assessment of layout, airflow needs, and room-by-room requirements

  2. Clear quote including calculations for available grants

  3. Careful installation with discreet duct routing (utility walls, drop ceilings)

  4. Smart programming of ventilation cycles according to school schedules

  5. Full airflow balancing and indoor air quality testing

  6. Detailed technical report for school administration with photos, measurements, and recommendations

Grants available for schools

Some schools qualify for public grants supporting energy upgrades, particularly under:

  • The Public Facility Renovation Program

  • Green municipal grants in Laval and Longueuil

  • Federal environmental funds for educational buildings

AirGreen assists you in identifying and preparing grant application documents.

Teacher testimonials: when ventilation transforms daily life

"Since the installation, my students are way more focused. We don’t open the windows as often, it’s less cold, and I hardly ever get end-of-day headaches anymore."
— Math teacher, High school in Verdun

"We never thought an air exchanger would make such a difference. Even parents have told us their kids are less tired when they come home."
— Primary school principal, North Shore

Why is this still so little known?

Because ventilation doesn’t make noise, isn’t visible, and doesn’t have the flashiness of a smartboard or new furniture. Yet, its impact is measurable, consistent, and long-term.

At AirGreen, we believe a well-ventilated school is one that gives students the best chance to succeed.

Do you work for a school, a school board, or a private institution in or around Montréal?
Call on AirGreen for a free analysis, and discover how a simple air exchanger can transform the daily lives of hundreds of students.

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