When indoor air quality becomes a priority, it’s often already too late. At AirGreen, we intervene every week in homes where the occupants — despite good intentions — have been living in an unhealthy environment… without even knowing it. That’s exactly what happened to a family in Longueuil, who believed they were breathing clean air — until a simple air quality test revealed a completely different story.
Comfort isn’t enough: why indoor air can be more polluted than outdoor air
In this single-family home on the South Shore, everything seemed fine: well-insulated home, efficient heating system, new windows. And yet, the mother suffered from frequent migraines, the kids were constantly sneezing, and the father felt persistent fatigue with no clear cause. There was no obvious link to their home environment.
It wasn’t until we performed an air quality assessment during a routine HVAC maintenance call that our team uncovered worrying levels of CO2, VOCs (volatile organic compounds), and excessive humidity in several rooms. The diagnosis was clear: chronic lack of ventilation was causing an accumulation of indoor pollutants, made worse by a complete absence of fresh air exchange with the outdoors.
AirGreen’s intervention: choosing, installing, and configuring the right ventilation system
Faced with this situation, we recommended installing a high-performance heat recovery ventilator (HRV), perfectly suited to the home’s size and occupancy rate.
The selected model: Venmar AVS® N Series HRV 160 CFM
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Brand: Venmar
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Type: Heat Recovery Ventilation (HRV) system
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Airflow: 160 CFM (cubic feet per minute)
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Features: washable MERV 8 filters, energy-efficient ECM technology, built-in humidity control, electronic wall control
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Energy efficiency: ENERGY STAR® certified — ideal for cold climates like Longueuil
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Grant eligibility: Up to $850 rebate through Hydro-Québec’s LogisVert program
A well-coordinated project: fast and hassle-free installation
At AirGreen, we know every HVAC installation must blend seamlessly into the existing setup. Here’s how we approached this project:
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Pre-installation inspection of the ductwork: verified available space in the basement ceiling
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Discreet preparation of fresh air intake and exhaust ducts
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Installation of the Venmar system in an optimized mechanical room
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Sealed drilling to the exterior, grille installation for air intake and exhaust
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Electrical connection and full performance testing
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System walkthrough with the customer and personalized configuration based on occupancy
The entire job was completed in a single day, without disrupting the family’s daily life.
Measurable results: a dramatic improvement in comfort and health
One week after the installation, we conducted a follow-up air quality test. The results were striking:
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68% reduction in VOCs
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Humidity stabilized around 45%
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Significant drop in CO2 levels in the bedrooms
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Gradual disappearance of symptoms (migraines, fatigue, allergies)
Beyond the numbers, it was the family’s restored well-being that proved just how impactful a proper ventilation system can be.
Why install a ventilation system in Longueuil (and anywhere in Québec)?
The Québec climate forces us to keep our windows shut for several months each year. Combined with increasingly airtight insulation, this leads to stagnant indoor air.
Indoor pollution comes from many sources: cleaning products, cooking, dust, pets, paints, plastics, etc. Without fresh air exchange, these pollutants build up and affect your respiratory health, sleep, and focus.
A ventilation system is therefore an essential part of any HVAC system, especially if you have:
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A new or well-insulated home
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Children or seniors in the house
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Issues with humidity or allergies
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A combustion-based heating system
Our recommendations for year-round healthy air
At AirGreen, we emphasize the importance of balanced, well-regulated ventilation. Here are our tips for getting the most from your system:
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Have your ventilation system serviced once a year
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Clean or replace filters every 3 to 6 months
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Never block air return or supply vents
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Activate “humidity control” mode during winter
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Make sure airflow is adjusted based on occupancy
AirGreen: HVAC expertise dedicated to your family’s health
For over 10 years, we’ve helped families in Montréal, Laval, Longueuil, the North Shore, and South Shore optimize their comfort and indoor air quality.
Our approach is simple:
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Personalized diagnosis
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Top-quality certified equipment
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Professional installation by accredited technicians
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Access to grants and government incentives
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High-quality after-sales service and follow-up
Installing a high-performance ventilation system is not a luxury. It’s an investment in your health, your energy levels, and your home’s long-term durability.
You too can test the air you breathe
Don’t let appearances fool you. Do what this Longueuil family did — and completely transform your daily life thanks to our expertise. One simple test can change everything.
Call AirGreen today to schedule a free evaluation. Breathe better, live better.