What Your Home Doesn’t Say Might Be Harming Your Health: Find Out With Our Exclusive Test
At AirGreen, we’ve visited hundreds of homes across Montréal, Laval, Longueuil, the North Shore and the South Shore. What’s striking is that most comfort or respiratory health problems don’t stem from heating or cooling systems—but from a CVAC ventilation system that’s poorly adapted or simply insufficient.
That’s why we’ve created a simple quiz, inspired by real situations from our customers, to help you find out if your home is also suffering from poor ventilation… without you even realizing it.
Take a few minutes to go through the statements below. If you relate to more than 3 situations, it’s likely your CVAC ventilation is failing, and that a professional solution such as an HRV or ERV air exchanger could significantly improve your indoor air quality and quality of life.
AirGreen Quiz: The Signs of a Failing Ventilation System
1. Excessive or Insufficient Humidity
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In winter, condensation forms on your windows.
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The air feels dry enough to cause sore throats or coughing.
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You need portable humidifiers or dehumidifiers in several rooms.
2. Persistent Odors
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Cooking smells linger for hours.
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Some rooms smell musty or like a damp basement.
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The air feels heavy or “stale” when you walk in.
3. Unexplained Physical Symptoms
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You or your family members frequently have headaches at home.
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You feel more tired indoors than outside.
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Eye, throat, or skin irritation appears without a clear reason.
4. Visible Mold Accumulation
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Black spots or stains appear in window corners or on the ceiling.
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You’ve cleaned mold… but it came back a few weeks later.
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There’s a moldy smell in certain areas of the home.
5. Stale Air or Poor Airflow
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Some rooms have no visible air supply or return grilles.
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Exhaust fans (in the bathroom, kitchen) are noisy or ineffective.
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The air doesn’t seem to circulate: one room is always too hot, another always too cold.
Why It’s Serious: The Hidden Dangers of Poor Ventilation
Inefficient ventilation causes:
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Build-up of pollutants (CO₂, volatile organic compounds, dust, radon)
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Mold growth, which poses a risk to your lungs
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Constant thermal discomfort, even with a powerful heat pump
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Reduced concentration, productivity, and quality of sleep
Case Study: AirGreen Intervention in Laval
One of our clients in Laval lived in a renovated home, equipped with a recent wall-mounted heat pump, but was experiencing frequent headaches and constant humidity. Our analysis showed a CO₂ level of 1450 ppm and relative humidity at 68%.
We installed a Fantech FLEX 100H ERV air exchanger, discreet and powerful, perfect for small residential spaces. The results:
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CO₂ dropped to 560 ppm
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Humidity stabilized at 45%
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Complete elimination of odors and morning fatigue
Why Standard CVAC Systems Aren’t Enough
Heating and cooling systems (furnaces, heat pumps, wall-mounted air conditioners) heat and cool the air, but they don’t renew it. Without a mechanical ventilation system, stale air remains trapped inside your home.
An HRV or ERV air exchanger, like the ones we install at AirGreen, allows you to:
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Extract stale air (humidity, odors, pollutants)
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Bring in filtered fresh air, with no heat loss
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Balance humidity levels year-round
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Maintain healthy indoor air quality 365 days a year
Our Concrete Recommendations
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Don’t rely on perceived comfort alone — toxic air can feel “normal”
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Install a CO₂ detector to monitor your indoor air quality
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Schedule a free CVAC inspection with AirGreen — we use professional tools to assess the situation
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Check out available grants — our air exchanger installations are often eligible for rebates from $550 to $1,600
Why Choose AirGreen?
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Certified expertise in residential mechanical ventilation
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Trained and experienced technicians for HRV/ERV installation
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10-year warranty on our installations
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Full support for grant applications (Rénoclimat, LogisVert, Chauffez Vert)
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Fast, clean, and professional service in Montréal, Laval, Longueuil, North Shore and South Shore
Conclusion: Did You Fail the Test?
If you related to more than three categories in this quiz, it’s time to act. Inadequate ventilation can affect your comfort, your health, your home… and your energy levels every day.
Contact AirGreen today for a free assessment, with no obligation. Our CVAC specialists will help you transform your home into a breathable, healthy, energy-efficient living space.
At AirGreen, we ask the right questions — so you never have to doubt the quality of your air again.