Poor indoor air quality is becoming an increasingly serious issue, especially in residential and commercial environments like those found in Longueuil, on the South Shore of Montréal. Among the main culprits behind this decline in air quality are two invisible but formidable foes: excess humidity and mold. At AirGreen, we understand how significantly these problems can impact the health of occupants, damage buildings, and compromise overall comfort. That’s why we offer customized ventilation solutions, designed to tackle these issues at the source.
The Silent Threat of Mold and Indoor Humidity
Mold thrives in humid, poorly ventilated environments and can spread in just a few days when conditions are right. It often grows behind walls, in basements, bathrooms, or attics lacking proper airflow. Its spores, invisible to the naked eye, can trigger allergic reactions, respiratory issues, and even worsen chronic conditions like asthma.
In many cases we’ve seen in Longueuil, the lack or inadequacy of mechanical ventilation is the primary cause. Everyday activities like showering, cooking, and drying clothes naturally generate moisture, which builds up without a proper way to be expelled.
Why Ventilation Is Essential in Longueuil
Located on the South Shore, Longueuil experiences wide seasonal climate shifts throughout the year. Cold winters force homes to remain sealed for extended periods, trapping indoor moisture. In summer, heat and frequent rain promote condensation. In this context, installing an efficient ventilation system is more than a comfort — it’s a necessity.
At AirGreen, we regularly respond to service calls in Longueuil homes where condensation on windows, lingering musty odors, or visible mold growth are reported. Our mission is to ensure healthy indoor air, no matter the season.
Case Study: Ventilation System Installed in a Single-Family Home in Longueuil
One of our recent projects perfectly illustrates the impact of proper ventilation. We were contacted by a family living in a single-family home in the Fatima neighborhood of Longueuil. For several months, they had noticed dark stains forming in the corners of their ceilings, along with a persistent smell of dampness. Despite using portable dehumidifiers, the issue persisted.
On-Site Diagnosis
Our team conducted a thorough inspection of the home. The verdict: stale air wasn’t being properly exhausted, and there wasn’t enough fresh air being brought in. The bathroom had only a small, outdated fan, the kitchen lacked a range hood vented outdoors, and there was no mechanical ventilation system in the basement.
The AirGreen Solution
We proposed a comprehensive and energy-efficient solution, including:
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Installation of a high-performance heat recovery ventilator (HRV) by Venmar, designed to recover heat while constantly renewing the indoor air.
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A powerful kitchen range hood vented directly outside.
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A quiet bathroom fan with a built-in humidity sensor.
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Insulated rigid ductwork, to prevent heat loss and condensation.
In less than two days, our team completed the entire installation, while preserving the home’s existing structure. We also balanced the system to ensure steady, efficient airflow throughout every room.
Results Observed
One month after the installation, the clients reported:
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Complete elimination of musty odors
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A drastic reduction in window condensation
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Noticeably fresher, healthier indoor air
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No further signs of mold reappearing
The Long-Term Benefits of Controlled Mechanical Ventilation (CMV)
Here’s why we recommend mechanical ventilation for homes, condos, and commercial spaces in Longueuil:
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Eliminates excess humidity
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Prevents mold growth
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Improves indoor air quality
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Reduces lingering odors
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Preserves the building’s structural integrity
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Increases property value over time
Grants and Incentives Available in Longueuil
Many of our clients are unaware that they may be eligible for financial assistance with their ventilation upgrades. While grants primarily target heat pump installations or major energy-efficiency renovations, some renovation programs from the City of Longueuil or Hydro-Québec may include assistance for adding an HRV.
At AirGreen, we take care of checking each project’s eligibility for grants and assist you with all the administrative steps.
Why Choose AirGreen for Your Ventilation in Longueuil?
Our certified technicians have in-depth expertise in installing, commissioning, and maintaining ventilation systems for both residential and commercial spaces. We always prioritize reliable, high-performance products tailored to Québec’s climate conditions.
What’s more, we respond quickly anywhere in Longueuil — whether in Old Longueuil, Saint-Hubert, Greenfield Park, or the new developments in the Boisé area.
Practical Tips to Prevent Humidity and Mold
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Air out damp rooms daily, even in winter.
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Install a smart humidity sensor in your bathrooms.
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Ensure your exhaust vents (kitchen, bathroom) are functional and properly vented outside.
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Avoid drying clothes indoors without proper ventilation.
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Have your ventilation system professionally inspected every 2 to 3 years.