A simple routine call can sometimes turn into a critical intervention. That’s exactly what happened during a recent HVAC cleaning service performed by our team at AirGreen in a residential neighbourhood in Montréal. What seemed like a basic annual maintenance visit turned out to be a genuine rescue operation, narrowly preventing a major fire hazard caused by a completely clogged ventilation system. Here’s the detailed account of this service call—an ideal example of why preventative HVAC maintenance is so important.
A standard service call… or so we thought
It all started with a typical request: a client in Montréal wanted a full inspection and cleaning of her central ventilation and heating system before the winter season. She had noticed that airflow was weak in some rooms and there was a slightly dusty smell in the house. We quickly suspected a major buildup of debris inside the ductwork.
Initial inspection: early warning signs
Upon arrival, we carried out a full inspection of the ventilation ductwork, the central blower fan, and the forced-air heating system. Using our inspection camera, we uncovered severe obstructions in multiple sections of the ducts, especially at the return air vents in the basement.
But the most alarming discovery was a cluster of flammable debris lodged in a bend of the main duct, dangerously close to the heat exchanger. Compacted dust, pet hair, and even bits of paper had accumulated in this critical area. In the event of motor overheating, this could’ve sparked a rapid, hidden fire—only visible once it was already too late.
Immediate intervention: full cleaning and hazard removal
Faced with the urgency, we performed a deep cleaning of the ventilation system using a combination of high-powered HEPA vacuuming, motorized rotary brush systems, and safe antibacterial treatments. The entire duct network was cleared, disinfected, and brought back to code, all while preserving the existing wall structures. We also replaced the central high-efficiency air filter, which hadn’t been changed in over a year.
As a precaution, we partially dismantled the central blower fan to inspect the motor and electrical connections. This move helped us avoid imminent overheating—the dust buildup around the motor was blocking proper heat dissipation. Thanks to our team’s vigilance, the client was spared from a major residential fire risk.
Lessons learned: why regular HVAC maintenance is essential
This case is a clear illustration of the hidden dangers that can accumulate inside an HVAC system. Blocked ventilation, often overlooked, can result in:
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Excess energy consumption due to the system overworking.
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Poor indoor air quality, with fine airborne particles.
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Fire hazards due to combustible buildup.
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Premature wear and tear of the system, reducing its lifespan.
At AirGreen, we strongly recommend professional annual cleaning, especially in homes with pets or where the HVAC system sees heavy usage. Our service includes full internal inspections, duct disinfection, and personalized recommendations based on how the building is used.
A typical Montréal service with life-saving results
This service call, performed in a single-family home in the Rosemont–La Petite-Patrie neighbourhood of Montréal, is part of our regular offerings throughout Greater Montréal, Laval, Longueuil, the North Shore, and the South Shore. We respond quickly, with technicians trained to spot hidden risks and take decisive, expert action on-site.
Client testimonial: “I was honestly scared when I saw what they found”
After the visit, the homeowner told us:
“I was honestly scared when I saw what they found. I never would’ve imagined my ventilation system could cause a fire. I’m so relieved I called AirGreen in time.”
Feedback like this confirms the critical value of preventative HVAC maintenance. It’s not just about thermal comfort—it’s about residential safety.
Why choose AirGreen for your ventilation cleaning in Montréal?
AirGreen stands out by combining technical expertise, fast response, and attentive customer care. Our HVAC cleaning and maintenance services are:
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Delivered by certified and experienced technicians.
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Suitable for all system types (central air, heat pumps, air exchangers, etc.).
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Aligned with the latest standards for indoor air quality.
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Available throughout Montréal, Laval, Longueuil, the North Shore, and the South Shore.
Our practical tips to help you stay safe
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Replace your filters every 3 months at minimum.
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Have your ductwork inspected at least once a year.
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If you notice reduced airflow or unusual odours, don’t wait.
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Choose a professional service to avoid costly or dangerous mistakes.
A simple cleaning can make all the difference
The story of this home in Montréal clearly shows that a simple ventilation cleaning can literally save your home from a fire. At AirGreen, we believe that high-quality preventative maintenance is your best defence against breakdowns, surprises, and hidden hazards. Don’t wait for a problem to show up—trust our expertise today.
Call AirGreen now for your next HVAC cleaning. We protect your comfort, your health… and your home.