Poor ventilation can trigger unsuspected effects on your mood
At AirGreen, we know that indoor air quality is often overlooked when it comes to mental health issues. And yet, inadequate ventilation – whether from a poorly designed HVAC system or an underperforming air exchanger – can create an indoor environment that is harmful to the brain. A recent study conducted by environmental health researchers has revealed a direct link between indoor air quality and cognitive disorders, anxiety, and irritability.
In Greater Montréal, including Laval, Longueuil, the North Shore, and the South Shore, many homes and commercial spaces suffer from poor ventilation, often due to outdated equipment or poorly maintained systems. The result: a buildup of indoor pollutants, fine particles, CO₂, excess humidity, or on the contrary, air that is too dry.
Mental symptoms triggered by an invisible imbalance
The revealing study published by the Center for Neuroscience and Society observed the effects of prolonged exposure to poorly ventilated air:
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Chronic fatigue, even after a full night’s sleep
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Concentration difficulties and short-term memory loss
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Mood swings, mild to moderate anxiety
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Increased migraines
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Sleep disturbances, frequent night awakenings
What’s most concerning is that these symptoms are often attributed to other causes, when in fact they are linked to an indoor environment that is too confined or poorly oxygenated.
Why mechanical ventilation is essential in our region
In Montréal, as in the rest of Québec, we spend up to 90% of our time indoors, especially during winter. This thermal confinement worsens the consequences of stale air. Newer buildings, which are well insulated for energy efficiency, often suffer from a lack of natural air renewal, increasing the concentration of indoor pollutants (VOCs, mold, humidity, CO₂, dust, etc.).
The absence or malfunction of a high-performance air exchanger can thus create a harmful microclimate. At AirGreen, we’ve seen several clients with persistent health issues significantly improve after the installation or replacement of an HRV or ERV system suited to their home.
Real-life AirGreen interventions in Montréal and surrounding areas
Case 1: Sainte-Julie (South Shore)
A family reported constant fatigue and concentration issues among their children. Upon inspection, we replaced an outdated air exchanger with a Venmar AVS S10 HRV equipped with a humidity sensor. The result: improved sleep, better overall energy, and noticeably fresher air, according to feedback after one month.
Case 2: Laval (Chomedey area)
A couple working from home complained of frequent migraines. CO₂ levels exceeded 1,800 ppm in their closed office. We installed a Lennox energy recovery ventilator model HRV700, with precise air flow calibration and high-efficiency filters. Two weeks later, the migraines were gone.
Case 3: Montréal (Plateau Mont-Royal)
In an older apartment, poor insulation led to excessive condensation and mold. We integrated a centralized ventilation system combined with a medical-grade dehumidifier, stabilizing humidity around 45%. The residents reported a significant drop in nighttime anxiety.
The importance of regular maintenance for your air exchanger
Even the best HVAC systems become ineffective without complete annual maintenance. Clogged filters, blocked ducts, misaligned fans, or uncalibrated humidity sensors can reduce a system’s efficiency by 30 to 50%, and therefore recreate an unhealthy indoor environment.
Our specialized technicians in Longueuil, Laval, and on the North Shore perform exhaustive maintenance: filter cleaning, duct disinfection, airflow testing, motor calibration. This constant care is what allows our clients to maintain healthy air and a clear mind.
How to tell if your ventilation is harming your mental well-being
Here are some warning signs to look out for:
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Your indoor air feels heavy or humid, even without cooking or laundry
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You often open the windows in winter just to “get a breath of fresh air”
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You struggle to concentrate or feel frequently irritable at home
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Persistent stale odors despite regular cleaning
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Appearance of mold or condensation on windows
If you recognize yourself in any of these symptoms, it may be time for a complete diagnosis of your HVAC ventilation system.
Our commitment at AirGreen: better breathing, better living
At AirGreen, we place indoor air quality at the core of our mission. Our centralized air exchangers, controlled mechanical ventilation solutions, and HVAC maintenance services are designed to address both the physical and mental health needs of families and professionals in the region.
We don’t just install machines: we transform indoor environments into havens of well-being, mental clarity, and lasting comfort.
Conclusion: your mental health begins with the air you breathe
Inadequate ventilation is not just a technical detail. It’s a silent source of stress, discomfort, and declining quality of life. At AirGreen, we believe clean air is a fundamental right. Thanks to our recognized expertise in Montréal, Laval, Longueuil, North Shore and South Shore, we help you regain inner balance—on every level.