An invisible threat could be compromising the air quality in your home: mold in your air conditioning system. At AirGreen, we regularly encounter this issue during our HVAC system cleaning services throughout Greater Montréal. In this article, we’ll take a deep dive into the real risks posed by mold in your air conditioning units, share authentic client testimonials, detailed real-life service examples in Montréal, Laval, Longueuil, North Shore and South Shore, and, most importantly, offer effective solutions to prevent it.
A silent threat to your comfort and your health
Mold in wall-mounted heat pumps, central systems, or ventilation setups isn’t just unsightly or smelly. It releases microscopic spores into your indoor air that can cause serious health problems: allergies, headaches, respiratory issues, even lung infections for the most vulnerable.
Worse still, mold usually thrives in hidden areas—inside ducts, indoor wall units, or neglected air exchangers.
AirGreen Testimonials: when our clients discover what they’ve been breathing
Service in Laval – The Gagnon Family, wall-mounted heat pump not cleaned in 5 years
The Gagnon family contacted us due to lingering odors in their living room. At first glance, their wall unit looked clean. But once we removed the front panel, we discovered a massive mold buildup on the evaporator coil and a clogged drain pan. The air coming out of the unit, loaded with spores, was being inhaled by the whole family—including an asthmatic child.
Our intervention:
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Full disassembly of the unit.
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Deep cleaning with specialized anti-fungal products.
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Pressure rinse of the evaporator coil.
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Complete disinfection of the drainage system.
After our visit, the smell disappeared, and the child’s respiratory issues significantly improved.
Montréal – Accounting office, central air conditioner
In a small downtown office, one employee constantly suffered from sinus issues. Upon inspecting their Goodman 3-ton central HVAC system, we discovered black mold on the coils and inside the ducts, caused by humidity buildup and lack of regular maintenance.
Our solution:
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Camera inspection of the ductwork.
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Full duct cleaning using high-powered vacuum extraction.
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Antimicrobial treatment applied throughout the system.
Staff reported noticeable improvement in air quality in under 48 hours.
Why and how does mold grow in your AC system?
Favorable conditions:
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Standing moisture in ducts or units.
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Blocked or poorly drained condensation pans.
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Skipping annual HVAC cleaning.
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Improper installation leading to excessive condensation.
High-risk zones:
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Evaporator coils (permanently humid areas).
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Blower fans.
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Drain pans.
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Filters not replaced frequently.
AirGreen cleaning services: more than just a surface wipe
At AirGreen, we don’t do surface-level cleanings. We deliver a full, hygienic restoration of your system:
What’s included in our complete HVAC cleaning service:
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Disassembly of wall-mounted or central indoor units.
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High-pressure coil cleaning.
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Drain pan and blower scrubbed clean.
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Disinfection using biodegradable antibacterial and antifungal products.
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Duct inspection to detect any mold spread.
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Suggested improvements (like secondary drain installation, pipe insulation, slope corrections, etc.).
We serve all of Montréal, Laval, Longueuil, the North Shore, and the South Shore, backed by extensive know-how from hundreds of successful jobs each year.
What you risk if you ignore mold
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Reduced performance from your HVAC system.
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Higher energy bills (up to +25% if coils are dirty).
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Shortened system lifespan.
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Chronic respiratory issues.
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Constant musty odors in the home.
When to clean? Our recommended schedule
| Equipment Type | Recommended Frequency | Services to Plan |
|---|---|---|
| Wall-mounted heat pump | At least once a year | Full unit cleaning |
| Central system | Once every 2 years | Duct + air exchanger cleaning |
| Heat recovery ventilator (HRV) | Once a year | Filters + pans + duct cleaning |
| Portable air conditioner | Every 6 months | Filter and condensate tray cleaning |
Our tips to prevent mold
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Change your filters every 1 to 3 months depending on usage.
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Schedule annual professional maintenance.
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Make sure your ductwork is properly insulated and free of condensation.
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Watch for unusual smells, excessive humidity, or strange noises.
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Install a dehumidifier if your home’s humidity consistently exceeds 55%.
AirGreen’s expertise at the service of your comfort
Every week, we help homes and businesses across Montréal, Laval, Longueuil, North Shore and South Shore get rid of mold, optimize their heat pump systems, and ensure healthy indoor air.
Our approach is built on:
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Certified, experienced technicians.
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Professional tools designed for HVAC cleaning.
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Deep knowledge of brands like Fujitsu, Gree, Goodman, Bosch, Lennox, and more.
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Tailored recommendations for each home.
Conclusion: Don’t let mold compromise your well-being
Mold in your AC system is neither rare nor harmless. It can affect your comfort, your health, and your system’s efficiency. At AirGreen, we provide rigorous, affordable, and effective HVAC cleaning services, backed by real results and honest customer testimonials.
Book your preventive or corrective cleaning service today. Our team responds promptly and discreetly throughout Greater Montréal.