Modern air conditioning is an essential asset for residential and commercial comfort, especially in Montréal, Laval, Longueuil, the North Shore, and the South Shore. Yet few people realize that their wall-mounted air conditioner or ventilation system, if poorly maintained, can become a true breeding ground for bacteria — sometimes even more contaminated than a toilet bowl. At AirGreen, we perform professional cleaning services for HVAC systems on a daily basis, and what we find inside these units would surprise even the most skeptical.
An invisible threat: mold and bacteria buildup in your HVAC system
When we’re called in for a deep cleaning of a wall-mounted air conditioner or a central ventilation system, we often uncover an accumulation of mold, dust, fungus, allergens, and even bacterial biofilms. These microorganisms thrive in humid, enclosed environments — exactly the kind your air conditioner creates when running.
The air circulating through these clogged filters and coils becomes the perfect vector for spreading these harmful particles throughout your living space. The result: headaches, coughing, chronic fatigue, allergies, and in more extreme cases, respiratory infections.
Real case study: a wall-mounted air conditioner in Longueuil
We were recently called in for a thorough cleaning of a wall-mounted air conditioner in a Longueuil condo. The client, concerned about air quality, contacted us after noticing a persistent foul odor. As soon as our technicians removed the front panel, they found a thick black layer of mold on the evaporator coil.
The homeowner had never cleaned the unit since its installation 5 years prior. The filter was clogged, the fins corroded from humidity, and the fans were covered in grime. In just a few hours, thanks to our exclusive high-pressure hydrostatic cleaning process, we completely restored the unit’s performance and hygiene.
How your air conditioner becomes dirtier than a toilet
It may sound shocking, but microbiological studies have shown that the coils of a neglected wall-mounted unit can contain more bacterial colonies than the surface of a clean toilet bowl. Why? Because toilets are often cleaned regularly, whereas HVAC systems are rarely cleaned, sometimes never.
Here are some components particularly at risk inside your unit:
-
Unwashed air filters (trap dust and allergens)
-
Damp coils (ideal spots for mold growth)
-
Dirty fans (spread spores throughout the house)
-
Stagnant drain pans (encourage bacterial growth)
The health risks of a poorly maintained air conditioner
The consequences of a dirty air conditioner go far beyond bad smells or reduced performance. Here are the main risks:
-
Irritated airways
-
Proliferation of allergens (dust mites, pollen, spores)
-
Worsening of asthma symptoms
-
Lower quality sleep
-
Cross-contamination in commercial buildings
Our professional HVAC cleaning services in Montréal and surrounding areas
At AirGreen, we provide fast service throughout Montréal, Laval, Longueuil, the North Shore, and the South Shore, offering comprehensive cleaning for your HVAC systems, including:
-
Wall-mounted air conditioners and mini-splits
-
Wall-mounted and central heat pumps
-
Ventilation units (HRVs and ERVs)
-
Forced-air central heating systems
-
Air ducts and ventilation lines
Our exclusive HVAC cleaning method
We use a strict and effective protocol that includes:
-
Full inspection of the unit using endoscopic cameras
-
Safe disassembly of panels and filters
-
High-pressure hydrostatic cleaning of the coils
-
Certified bactericidal disinfection
-
Duct vacuuming, if applicable
-
Reassembly and unit calibration
This process helps restore up to 95% of the unit’s original capacity, while also extending its lifespan by several years.
Recommended cleaning frequency
To maintain healthy indoor air in your home or business, we recommend:
-
Annual cleaning for wall-mounted air conditioners used in summer
-
Twice-a-year cleaning for heat pumps used in both summer and winter
-
Biannual inspections of central ducted systems
Grants and benefits of preventive maintenance
While there are currently no direct grants for HVAC cleaning, several programs such as Rénoclimat require the system to be in good working condition for a new installation to be eligible for financial aid. Additionally, a clean system can consume up to 20% less energy, resulting in real savings on your Hydro-Québec bill.
Why choose AirGreen for your HVAC cleaning?
-
Certified and experienced technicians
-
Fast and discreet service
-
Non-toxic, environmentally friendly procedures
-
Industrial-grade professional equipment
-
Satisfaction guarantee
We’ve already performed hundreds of residential and commercial HVAC cleanings in Montréal and the surrounding regions. Our clients consistently report immediate improvements in air quality, quieter operation, and greater energy efficiency.
A clean air conditioner means clean air for everyone
Don’t underestimate the impact a neglected unit can have on your well-being. At AirGreen, we firmly believe that a good HVAC system is a system that’s clean, well-maintained, and high-performing. Contact us today to schedule your HVAC cleaning service in Montréal, Laval, Longueuil, or on the North Shore or South Shore. Your health and comfort depend on it.