These five real-life service calls handled by AirGreen in Laval vividly illustrate the consequences of neglected HVAC maintenance, while showcasing our expertise in professional duct cleaning. These stories, as unexpected as they are informative, prove that behind a simple vent grille, you may find much more than you ever imagined.
A hidden buildup with very real consequences
In multiple neighbourhoods across Laval, we were called in for service visits where the symptoms were often the same: reduced system performance, foul odours, increased allergies. Each time, our inspections revealed critical issues within the HVAC ducts, usually caused by years without cleaning.
A toy invasion in a Fabreville home
In a single-family home in Fabreville, a family was experiencing poor airflow in several rooms. After a camera inspection, our team discovered a full collection of small toys blocking the main ducts. Miniature cars, foam balls, building blocks — all were preventing proper air circulation.
Result:
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Decreased performance of the central heat pump.
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Increased energy consumption.
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Cold zones in winter.
Our intervention:
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Mechanical cleaning with rotating brushes.
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HEPA negative-pressure vacuuming.
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Installation of protective filters over low return vents.
A mouse nest in the main return duct in Chomedey
In a rental condo in Chomedey, a lingering odour in the living room wasn’t coming from the walls or furniture. Upon opening the main return duct, we found an old mouse nest, complete with leftover food and nesting materials. The infestation was subtle, but contaminants were circulating throughout the system.
Actions completed by AirGreen:
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Full removal of the nest.
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Disinfection of the duct network with certified products.
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Thorough cleaning of the air exchanger.
Immediate benefit: restored indoor air quality, and healthier air for the occupants.
Mold-blocked ventilation in Duvernay
An older home in Duvernay, recently purchased by a couple with two asthmatic children, contacted us after repeated allergic flare-ups. Our thermographic inspection revealed excess humidity in the ductwork, with active mold growth over nearly 8 linear meters.
Causes:
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Poor duct insulation.
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Unventilated crawlspace.
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No maintenance in over 15 years.
AirGreen’s solution:
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Enhanced mechanical cleaning.
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Specialized anti-fungal treatment.
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Recommended insulation and supplemental dehumidification.
A wasp colony in a Laval-des-Rapides bungalow
A surprising, yet real situation: in a bungalow in Laval-des-Rapides, a wasp colony had made a home inside an unused duct connected to the outdoors. When the client tried turning the system back on in late spring, they felt warm air… followed by the sound of buzzing wings.
Measures taken:
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Coordinated response with a certified pest control partner.
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Duct disassembly and complete cleaning.
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Installation of exterior grilles with insect-proof mesh.
The strange case of missing tax files in Saint-François
An accounting firm in Saint-François kept losing lightweight documents. After ruling out human error, we inspected the return ducts of the central air conditioning system. To everyone’s surprise, several pages had slipped into the ducts, pulled in by a return vent located behind a printer.
What we did:
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Camera inspection and delicate retrieval of the documents.
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Strategic repositioning of return vents.
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Added protective mesh screens.
The most common mistakes to avoid
These stories illustrate several recurring mistakes we’ve seen throughout Laval:
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Skipping HVAC maintenance for years.
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Failing to install protective screens on exterior grilles.
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Ignoring basement humidity.
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Placing furniture or objects too close to return vents.
Why professional HVAC duct cleaning is essential in Laval
Indoor pollution, seasonal pollen, humidity, and extreme temperatures in the greater Montréal area make periodic duct maintenance essential. At AirGreen, our expertise is built on:
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Certified, experienced technicians.
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Specialized equipment (HD cameras, industrial vacuums, mechanical brushes).
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In-depth knowledge of Laval’s residential and commercial building types.
We offer tailored services for single-family homes, condos, businesses, and multi-unit buildings.
How often should you clean your ducts in Laval?
We recommend a full cleaning every 3 to 5 years, depending on usage, pets, occupants’ sensitivity, and humidity conditions. Here are a few signs that it’s time to call us:
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Black dust buildup around grilles.
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Persistent bad odours.
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Ongoing allergy symptoms.
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Uneven heating or cooling.
AirGreen: your HVAC cleaning expert in Laval
AirGreen is trusted throughout Greater Montréal for our meticulous approach, professionalism, and transparency. We serve clients across Laval, Montréal, Longueuil, the North Shore, and the South Shore with real, effective solutions:
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Free evaluation with visual inspection.
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Detailed reports with before/after photos.
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Personalized advice and preventative measures.
Contact us for a full duct system evaluation
Your HVAC ducts are out of sight — until there’s a problem. Don’t let intruders, mold, or layout mistakes compromise the air quality of your Laval property. At AirGreen, we’re ready to step in quickly, effectively, and with a human touch.