An invisible but very real threat: the accumulation of contaminants in residential air ducts is one of the most underestimated dangers in homes across Montréal, Laval, Longueuil, the North Shore, and the South Shore. At AirGreen, we are often called to homes that appear modern and well-maintained, yet whose occupants breathe air filled with dust, mold spores, allergens, and even bacteria on a daily basis. In this article, we reveal why regular cleaning of your heating and cooling ducts is essential to protect your family’s health, improve indoor comfort, and optimize the energy efficiency of your HVAC system.
A Hidden Threat at the Heart of Your HVAC System
Your air ducts form the central network that distributes heated or cooled air throughout your home. Over time, these ducts become reservoirs for harmful pollutants:
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Fine dust and particles from carpets, fabrics, and surfaces around the house
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Pet hair, dander, and dust mites
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Mold spores, promoted by humidity and condensation
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Smoke residues (from cigarettes, fireplaces, etc.)
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Chemical pollutants like VOCs (volatile organic compounds) released by cleaning products, glues, and paints
These contaminants build up silently inside the ducts and are redistributed every time your heating or cooling system is turned on. The result? A decline in indoor air quality, invisible to the eye but very real in its impact on your health.
Real Case: AirGreen’s Intervention in Saint-Lambert
During a recent HVAC duct cleaning in Saint-Lambert, on the South Shore, we were called to a family home where several members were suffering from persistent allergies—despite a clean and well-ventilated environment. A high-resolution camera inspection revealed dust deposits over 2 cm thick and visible black mold spots in several ducts, especially near the basement.
Our team carried out a complete ductwork cleaning, using a combination of motorized rotary brushes, high-pressure industrial vacuum systems, and an antimicrobial treatment that’s safe for all occupants. The result: within a few days, allergic symptoms subsided, and the family noticed a remarkable improvement in indoor air quality.
Health Risks: What You Can’t See Can Definitely Harm You
Many studies have shown a direct link between indoor air quality and a variety of health issues:
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Irritation of the eyes, nose, and throat
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Worsening of asthma
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Chronic allergic reactions
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Frequent headaches
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Unexplained fatigue
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Recurring respiratory infections
Children, the elderly, and immunocompromised individuals are especially vulnerable. By neglecting your air ducts, you may unknowingly be exposing your household to an unhealthy environment that could have serious long-term consequences.
Loss of Energy Efficiency: Another Hidden Cost
A clogged HVAC system has to work harder to push air through dirty ducts. This leads to:
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Increased energy consumption
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Premature wear and tear on your heat pump or furnace
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Higher energy bills
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Less consistent indoor temperatures
In Montréal, during another service call in Ahuntsic, we found that a simple duct cleaning helped reduce the operating time of the main blower fan by 30%—while delivering better comfort across all rooms.
How Often Should You Clean Your Ducts?
At AirGreen, we recommend HVAC maintenance every 3 to 5 years, or more frequently in the following situations:
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Presence of pets
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Recent renovation or construction work
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Persistent odors or visible mold
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Allergies or respiratory issues in the household
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Buying a pre-owned home with no cleaning history
Our Methods: Advanced Technologies for Your Health
We use industry-certified equipment to ensure a deep clean without damaging your ducts. Our service typically includes:
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Camera inspection of the inside of the ducts
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Sealing of vents to prevent contaminant spread
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High-pressure negative air vacuum extraction
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Disinfection using non-toxic agents
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Recommendations for future upkeep and indoor air quality improvements
AirGreen: Your Trusted Partner in Montréal and Surrounding Areas
For years, we’ve been providing air duct cleaning for ventilation, heating, and cooling systems throughout the Greater Montréal area, including Laval, Longueuil, and across the North Shore (Terrebonne, Blainville, Repentigny) and the South Shore (Brossard, Boucherville, Saint-Jean-sur-Richelieu).
Our commitment is simple: to provide you with a healthier environment, a more efficient system, and lasting peace of mind.
Pro Tips: How to Maintain Indoor Air Quality Between Cleanings
Even between professional cleanings, you can adopt a few good habits:
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Replace your air filters every 3 months
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Avoid harsh chemical products
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Ventilate your home daily
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Maintain indoor humidity between 40–60%
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Schedule an annual HVAC system inspection
Why Trust AirGreen?
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Fast, effective interventions
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Certified, experienced technicians
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State-of-the-art professional equipment
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Transparent, courteous customer service
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Proven experience in all environments (homes, condos, apartment buildings, offices)
Conclusion: What’s Hiding in Your Ducts Deserves Serious Attention
Your air ducts are more than just pipes—they carry the air you breathe. And if that air is loaded with contaminants, your comfort and health are directly impacted. Don’t let an invisible threat settle into your home. At AirGreen, we’re ready to step in—wherever you are in Montréal, Laval, Longueuil, on the North Shore, or the South Shore.
Trust your air duct cleaning to experienced HVAC professionals for a healthier, more comfortable, and more energy-efficient home.