Laval faces a real but invisible threat: polluted indoor air is becoming a daily hazard
Over the past few months, our technicians at AirGreen have seen a concerning rise in problems related to indoor air quality in homes and commercial buildings throughout Laval. In a context where people now spend over 90% of their time indoors, mechanical ventilation is no longer a secondary option—it has become a vital necessity to protect health, comfort, and building integrity.
Concerning local findings during our HVAC service calls
Our recent service calls in various Laval neighbourhoods—Chomedey, Fabreville, Duvernay, Pont-Viau—have exposed serious issues:
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High humidity levels leading to invisible mold growth inside walls and ducts
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Build-up of fine particles (PM2.5) in poorly maintained systems
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Presence of VOCs (volatile organic compounds) in the air that occupants breathe daily
In many cases, residents reported fatigue, headaches, allergies—without ever suspecting their ventilation system was to blame.
Why is Laval particularly vulnerable?
Laval’s urban and climate configuration makes the issue worse:
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A high concentration of busy roadways, constantly emitting NOx and PM2.5
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Rapid residential development, with some buildings poorly ventilated or badly designed
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Harsh winter conditions, prompting residents to seal their homes and trap pollutants inside
The result: indoor air is often more polluted than outdoor air, drastically increasing health risks.
Real-world example: intervention in a Laval-des-Rapides home
A family with two young children was experiencing recurring respiratory issues. No visible mold, but there was a stale odour in some rooms. Our team:
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Performed a full ventilation audit using CO2 and humidity sensors
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Inspected the ductwork using an endoscopic camera
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Installed a Venmar AVS® HRV with enthalpic core, paired with a HEPA filter
Results:
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52% reduction in indoor CO2 levels
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Humidity stabilized at 45%
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Allergy symptoms disappeared in less than two weeks
Common mistakes we observe in Laval
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Lack of mechanical ventilation in new or renovated buildings
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Non-existent HVAC maintenance for several years
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Use of incompatible or unchanged filters, letting allergens and dust circulate
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Unbalanced systems causing insufficient airflow in bedrooms and bathrooms
How to effectively improve indoor air quality in Laval
Here’s what we consistently recommend:
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Install a centralized ventilation system with heat recovery (HRV or ERV)
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Schedule an annual inspection by certified technicians
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Replace filters every 3 months, especially in spring and fall
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Monitor humidity with a smart sensor connected to your ventilation system
Our HVAC solutions tailored to Laval’s climate and urban layout
At AirGreen, we prioritize:
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High-efficiency energy-saving equipment, eligible for LogisVert grants
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Quiet, discreet systems designed for urban homes
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Fast and clean installations, with minimal disruption to daily life
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A local after-sales service, responsive and trained to maintain your system over time
AirGreen: more than an installer, a partner in your long-term health
Our mission goes far beyond installing equipment. We evaluate each building, each family, each use case, to recommend the best ventilation solution possible, based on Laval’s unique context. Thanks to our completed projects in Laval and over 10 years of hands-on expertise, we’ve become a leading authority in indoor air quality.