The quality of the air we breathe every day in Longueuil—whether at home, at work, or in any enclosed space—depends heavily on two key factors: outdoor pollution and the effectiveness of indoor ventilation. At AirGreen, we deal with this reality every day, especially during our ventilation system installations for residential and commercial buildings in Longueuil, on the South Shore, as well as in Montréal, Laval, and the North Shore. So, between polluted outdoor air and an inadequate indoor ventilation system, which one poses the greatest risk to your health and comfort?
Outdoor Air in Longueuil: A Concerning Reality
The City of Longueuil, while green and residential, is not exempt from urban air pollution. Vehicle traffic, industry in nearby areas, smog episodes during the summer, and wood heating in the winter all generate fine particles (PM2.5), ozone, and other harmful pollutants. These contaminants can penetrate indoor environments, especially if the building envelope is poorly sealed or if the ventilation systems are outdated.
Studies conducted in the greater Montréal area show that periods of high outdoor pollution can cause acute respiratory effects in children, the elderly, and individuals with chronic lung conditions. However, this danger is often made worse by a lack of proper indoor ventilation.
Indoor Ventilation: Your First Line of Defense
Contrary to popular belief, closing windows to avoid outdoor pollution is not a long-term solution if you don’t have an efficient mechanical ventilation system. A poorly ventilated indoor space quickly becomes a more concentrated source of pollution than the outdoor air itself.
At AirGreen, we’ve installed numerous centralized heat recovery ventilation systems (HRVs) in Longueuil, tailored to the unique climate conditions of Québec. These systems allow for:
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Exhausting stale indoor air (CO2, humidity, VOCs…)
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Introducing fresh, filtered air from outside
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Saving energy by recovering heat from the outgoing air
This type of ventilation ensures a constant renewal of air without opening windows, limiting direct infiltration of outdoor pollutants.
Case Study: A Successful Installation in Longueuil
A telling example of our expertise is an installation completed in a single-family home in the Vieux-Longueuil area. The homeowner, concerned about their asthmatic child’s health, contacted us to replace an outdated supplementary ventilation unit.
Identified problem: infiltration of fine dust, condensation on windows, CO2 levels exceeding 1500 ppm in bedrooms.
AirGreen’s solution: installation of a Venmar EVO5 500 HRV with insulated rigid ducts, MERV 13 filters, and smart central control. This high-performance model delivers 504 CFM, excellent thermal efficiency (up to 75%), and a noticeable reduction in airborne particles.
Measured results:
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CO2 stabilized below 800 ppm
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Improved sleep quality
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Indoor humidity maintained at 40–45%
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Reduction of respiratory symptoms
Indoor Pollution: Often Underestimated
Without mechanical ventilation, indoor pollutants such as:
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Volatile Organic Compounds (VOCs) from paint, furniture, cleaning products
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Radon in basements
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CO2 naturally emitted by occupants
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Excess humidity, leading to mold
can accumulate in closed spaces. These pollutants can have effects on concentration, sleep quality, and lung health. Even a modern wall-mounted heat pump won’t solve this issue if it’s not paired with proper ventilation.
Comparison: Which Risk Is Actually Worse?
| Criteria | Outdoor Pollution | Poor Indoor Ventilation |
|---|---|---|
| Source | Traffic, industry, wood heating | CO2, humidity, VOCs, mold |
| Personal control | Limited | Controllable with HVAC installation |
| Exposure | Varies by season | Continuous in indoor environments |
| Health risks | Respiratory, cardiovascular | Chronic, neurological, respiratory |
| Mitigation solutions | Filtration, HRV, sealing | Controlled mechanical ventilation |
Conclusion: Without question, poor indoor ventilation poses a more constant and insidious threat than outdoor pollution. That’s precisely why investing in a high-performance ventilation system is becoming a health and energy priority in Longueuil and in urban areas throughout Québec.
Why Choose AirGreen for Your Ventilation Needs in Longueuil?
AirGreen is a company specialized in integrated HVAC solutions. We install custom systems based on your building, lifestyle, and energy performance goals. Our certified technicians provide professional installations using high-efficiency products, such as:
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Venmar AVS N Series
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Lifebreath Max Series
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Fantech VHR Series
We provide prompt service throughout the South Shore, particularly in Longueuil, Saint-Hubert, Boucherville, as well as Montréal, Laval, and the North Shore. We offer personalized consultation, maintenance plans, and complete project management for your ventilation needs.
Available Grants for Ventilation System Installation
Residents of Longueuil may qualify for provincial subsidies through the Rénoclimat program or certain municipal incentives. We assist you throughout the funding application process, energy evaluation, and preparation of required documentation.
Key Takeaways
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Poor indoor ventilation is a hidden danger that can severely impact your health.
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Outdoor pollution can be managed indoors with the right HRV systems.
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AirGreen installs custom, effective, and discreet solutions that meet the strictest standards.
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In Longueuil and beyond, a reliable ventilation system is essential for clean air and comfort.