Breathe Better at Home: When Ventilation Becomes a Shield Against Indoor Pollution
On the South Shore, in a quiet residential neighborhood near Longueuil, a couple transformed their home into a model of indoor air quality. How? Through a bold and meticulous strategy centered around an anti-pollution ventilation system, designed and installed by our experts at AirGreen.
In a context where domestic pollutants (fine dust, volatile organic compounds, excessive humidity) can be more harmful than outdoor air, this project became a concrete example of prevention and performance in residential HVAC. Here are all the details of this ambitious installation and the lessons it offers to those looking to live in a healthier home.
Why Indoor Pollution Is a Critical Issue on the South Shore
Many residents of Montréal, Laval, Longueuil, the North Shore, and the South Shore are unaware that indoor air can be up to five times more polluted than outdoor air, according to studies by Health Canada. Mold, radon, emissions from building materials, pet dander, and even scented candles contribute to this invisible yet very real pollution.
As homes become increasingly airtight for energy efficiency, these pollutants accumulate. That’s when mechanical ventilation systems, especially Energy Recovery Ventilators (ERVs), become indispensable.
An Inspiring Project: Making Indoor Air as Pure as a Forest
The couple living in this single-family home wanted to improve the comfort of their asthmatic daughter, who often experienced attacks during winter. After extensive research, they contacted AirGreen for a full assessment of the air quality in their home.
Our team identified high relative humidity, poor air circulation in certain areas, and abnormal levels of VOCs in the kitchen and bathroom. The chosen approach was to completely rethink the home’s mechanical ventilation, with a top priority on advanced pollutant filtration.
Equipment Choice: Zehnder ComfoAir Q450 Ventilation System
We proposed and installed the Zehnder ComfoAir Q450, globally recognized for its high energy efficiency, fine particle filtration capabilities, and integrated soundproofing. This model stands out for:
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An ultra-efficient heat recovery exchanger
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Compatibility with F7 filters to capture pollen and PM2.5
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Intelligent airflow control based on occupancy
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96% efficiency in heat recovery mode
Technical Challenges During Installation
This home, built in 1998, had no existing ventilation ducts on the upper floor. To avoid damaging the recently renovated finishes, our technicians opted for partial suspended ceiling distribution, with hidden air supply vents in the moldings.
The most delicate challenge was routing the ducts to the basement without altering the structure. Thanks to a preliminary 3D scan, our installers were able to discreetly plan a path through an unused former service shaft.
Results Observed After 3 Months
The improvement was dramatic, as the homeowners shared:
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Asthma attacks disappeared for their daughter
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Odors eliminated in the kitchen and bathrooms
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Improved sleep quality, confirmed by their connected air monitors
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18% energy savings over the last three Hydro-Québec billing cycles
This system transformed the indoor environment. The perceived comfort is drastically different, and visitors immediately notice the freshness and purity of the air—even in winter.
Practical Advice to Replicate This Success on the South Shore
For homeowners looking to follow this example, here are our field-tested recommendations:
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Don’t rely solely on your nose: air quality sensors are essential for a proper diagnosis.
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Opt for centralized ventilation with heat recovery, not just a basic air exchanger.
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Choose a certified installer familiar with RBQ standards, building code requirements, and the South Shore climate.
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Verify compatibility with grants under Hydro-Québec’s LogisVert program.
AirGreen: Tailored Anti-Pollution Solutions
At AirGreen, indoor air quality is a true specialty. Our teams based in Montréal, Laval, Longueuil, and on both shores of the river assess every building individually to recommend the most efficient, discreet, and cost-effective solution.
We work with top-tier brands (Zehnder, Venmar, Lifebreath), while respecting your architectural and aesthetic constraints. Whether you're dealing with condensation issues, allergies, odors, or chronic fatigue, we have the right equipment and the expertise to help.
Conclusion: To Live in a Healthier Home, Ventilation Is Not Optional
This South Shore home, once plagued by humidity and allergens, has become a model of healthy living thanks to a custom HVAC installation. This project proves that well-thought-out and properly executed ventilation improves health, comfort, and property value.
Want to learn more about our indoor anti-pollution solutions or get a free estimate for your home? Contact us today.