The true story of a Montreal client who transformed his indoor air in just 24 hours thanks to AirGreen.

A fast and expert intervention for purified air in the heart of Montreal

At AirGreen, our mission is to deliver more than just a HVAC cleaning service — we provide personalized support and a concrete transformation of your indoor comfort. This story, rooted in a residential area of Montreal, demonstrates our ability to respond quickly to urgent needs related to heating, ventilation, and air conditioning.

In this particular case, a client living in an older building in the Rosemont–La Petite-Patrie neighborhood reached out to us due to a noticeable decline in indoor air quality. Symptoms such as excessive dust, persistent odors, and a heavy air sensation had him concerned. He had a central HVAC system combining heating and cooling, installed over 10 years ago, and never thoroughly cleaned.

Initial diagnosis: a clogged and underperforming system

Upon arrival, we conducted a full inspection of his HVAC system. Our certified technicians discovered a significant buildup of dust, mold, and allergens inside the air ducts, vents, and central unit.

Key issues we observed:

• Completely saturated filters

• Debris accumulation in the ventilation ducts

• Visible mold in dark and damp areas of the system

• Significantly reduced energy efficiency

• Unpleasant odors circulating through the air vents

These issues were not only impacting the indoor air quality, but also the energy performance of the system and, consequently, the client’s electricity bill.

The AirGreen intervention: a 5-step transformation completed within 24 hours

Aware of the urgency, we carried out a full-service intervention in less than 24 hours, performing a deep clean from the central unit to the smallest corner of the ventilation network.

Step 1: Site preparation

We protected every room in the home to avoid any contamination during the cleaning process. The client appreciated our attention to detail and respect for his home.

Step 2: Mechanical cleaning and negative pressure vacuuming

Using our high-powered professional equipment, we removed several kilograms of dust and debris from the ducts. This mechanical cleaning method eliminates particles without damaging the ductwork.

Step 3: Antibacterial and antifungal disinfection

We applied a certified disinfectant treatment, effective against mold, fungi, and bacteria, and compliant with Quebec’s environmental standards.

Step 4: HVAC unit cleaning and HEPA filter replacement

The central unit was disassembled and cleaned using non-corrosive products. The HEPA filter was replaced with a high-performance model suitable for seasonal allergies — very common in Montreal and Laval.

Step 5: Performance testing and air quality analysis

We completed the intervention with a post-cleaning air analysis and a full system performance test. The result: an 83% improvement in ambient air purity and an estimated 22% reduction in energy consumption.

Results: clean air, reassured client

Less than 24 hours after his initial call, our client told us he was breathing “as if the air had been completely renewed”. The odors were gone, indoor temperatures were more stable, and the environment was far more comfortable.

The system, now fully optimized, is operating at close to its original efficiency, extending its lifespan while lowering consumption. A win both for the client’s comfort and his wallet.

Why HVAC cleaning is essential across Greater Montreal

A demanding climate

In Montreal, Laval, Longueuil, and the North and South Shores, climate variations accelerate the buildup of pollutants in HVAC systems. Regular cleaning of the ducts and units is crucial for ensuring healthy indoor air, especially in older buildings.

Risks that are often underestimated

Poorly maintained ductwork can harbor mold spores, dust mites, and allergens that worsen asthma, rhinitis, and respiratory discomfort — particularly for children and the elderly.

What sets AirGreen apart

• Fast response times — service within 24 to 48 hours

• Certified technicians (RBQ and ACQ members)

• Eco-friendly products, safe for the whole family

• Comprehensive post-cleaning report, with before/after photos

• Customizable annual maintenance plans available

Tips for maintaining the benefits of an HVAC cleaning

1. Replace your filters every 3 months

2. Have your ducts inspected every 2 years

3. Install an air purifier if you have pets or allergies

4. Plan seasonal maintenance before extreme heat or cold

Our service areas across Greater Montreal

We provide HVAC cleaning services in:

• Montreal: Villeray, Plateau, Rosemont, Ahuntsic, Outremont

• Laval: Chomedey, Laval-des-Rapides, Sainte-Dorothée

• Longueuil: Saint-Hubert, Vieux-Longueuil, Greenfield Park

• North and South Shores: Brossard, Sainte-Julie, Blainville, Terrebonne

Client testimonial

"I never imagined that cleaning an HVAC system could make such a difference. The AirGreen team was fast, professional, and their work literally changed our daily life."
— M. B., Montreal

Conclusion: Breathe easy with AirGreen

At AirGreen, we know that HVAC cleaning isn’t just a service — it’s an investment in your health, comfort, and energy efficiency. Our local expertise, combined with our attention to detail, allows us to guarantee every client a swift and lasting transformation of their indoor environment.

For a free evaluation or a fast service call, contact us today. Breathe better, live better — with AirGreen.