Viruses in the Air: How Clean Ventilation Protects Your Health (Data-Backed)

The Crucial Importance of a Clean Ventilation System for Your Daily Well-Being

At AirGreen, we know that the air we breathe indoors—whether at home or in the workplace—can have a direct impact on our health. In Montréal, Laval, Longueuil, on the North Shore and South Shore, many households and businesses are still unaware of how a poorly maintained ventilation system can promote the spread of viruses, bacteria, and other harmful particles. This is even more true in enclosed indoor spaces, especially during colder seasons when heating systems are running at full capacity.

In this article, we present concrete data, real cases from our service calls, and proven HVAC solutions to ensure a healthy, breathable, and protected environment.

Indoor Air: An Underestimated Danger

Multiple studies conducted by Health Canada and the INSPQ confirm that indoor air is often up to five times more polluted than outdoor air. This pollution mainly comes from:

• Dirty or clogged ventilation systems

• Blocked filters that haven’t been replaced

• Accumulations of dust, mold, bacteria, spores, and viruses inside ducts

• High CO₂ levels in poorly ventilated spaces

These elements are responsible for numerous respiratory symptoms: asthma, allergies, frequent viral infections, chronic headaches, fatigue, and even reduced concentration in children.

Viruses in the Air: A Silent Spread

Viral particles suspended in the air—such as those from COVID-19, the flu, or the respiratory syncytial virus (RSV)—can remain airborne for several hours in a poorly ventilated space. This means that a single infected person can, without even coughing, infect multiple others if the ventilation system doesn’t adequately refresh the air.

At AirGreen, we’ve been called in to service several commercial buildings and residences where occupants were suffering from chronic illnesses or frequent viral recurrences. In 95% of cases, a thorough cleaning of the ventilation ducts and disinfection with certified products led to a significant improvement in indoor air quality.

Case Study: Ventilation Cleaning in Longueuil

Recently, a family in Longueuil contacted us after a series of respiratory illnesses affecting their children. Upon inspection:

• The ducts were obstructed by a thick layer of dust and debris.

• The heat recovery ventilator (HRV) system was no longer functioning properly.

• No ventilation cleaning had been done in over 10 years.

We proceeded with:

1. A complete cleaning of the entire ventilation duct network using HEPA-equipped systems.

2. Disinfection with dry steam and stabilized hydrogen peroxide.

3. Replacement of the HRV with a more efficient, energy-saving model.

The result: within just a few weeks, the family noticed a sharp drop in asthma and cold episodes among the children. They also reported greater overall comfort and a noticeable freshness in their home.

Why Choose AirGreen for HVAC Cleaning?

We don’t offer one-size-fits-all services. Every building is unique, and so are its challenges. Our team of certified technicians offers:

• Video inspections of the ducts to view real-time contaminants inside.

• The use of dust-free technology to protect your furniture and electronics.

• Health Canada-approved disinfectant products.

• Customized recommendations to improve airflow and reduce health risks.

We work in all types of buildings: single-family homes, condos, daycares, offices, businesses, schools, clinics, and more.

Mechanical Ventilation: An Essential Health Shield

Installing controlled mechanical ventilation (CMV) systems or heat recovery ventilators (HRVs) is now as much a health investment as an energy-saving one. These systems:

• Refresh indoor air without heat loss.

• Filter fine particles, allergens, spores, and viruses.

• Balance indoor humidity to prevent condensation and mold.

At AirGreen, we often recommend models like the Venmar AVS HRV or the Lifebreath 195 ECM for their performance, low energy consumption, and reliability.

Recommended Maintenance Frequency

Here’s what we recommend to our clients across Montréal, Laval, Longueuil, North Shore and South Shore:

Signs That Your Ventilation Needs Cleaning

Watch for these indicators:

• Persistent odors in rooms

• Abnormal dust buildup

• Unusual noise in the ductwork

• Excess humidity or condensation on windows

• Respiratory discomfort or recurring allergies

If in doubt, a quick inspection by our experts can save you from costly health issues.

Available Grants for Ventilation Upgrades

Did you know some Québec grant programs help fund part of your new ventilation or heat recovery system? For example:

• Rénoclimat Program

• LogisVert Grant by Hydro-Québec

• Local municipal incentives (varies by borough)

At AirGreen, we support you from start to finish: choosing equipment, applying for grants, installation, and maintenance.

Our Commitment: Breathe Clean Air, Together

Protecting your health also means ensuring clean and renewed indoor air. Thanks to our expertise in HVAC duct cleaning, air quality diagnostics, and preventive maintenance, we help hundreds of families and businesses each year to breathe better.

We respond quickly throughout Greater Montréal, including Boisbriand, Brossard, Repentigny, Saint-Lambert, Terrebonne, Lavaltrie, and Vaudreuil-Dorion.