When Ventilation Becomes a Public Health Matter
In our work as HVAC ventilation specialists at AirGreen, we encounter real-world situations every week where poor indoor air quality seriously harms the health of occupants. This isn’t an exaggeration: in Laval, as in the Greater Montréal area, many families, workers, and children breathe indoor air that’s more polluted than what’s outside. But this doesn’t have to be the case. Here, we present three authentic cases, directly from the field, where our ventilation intervention literally transformed our clients’ lives.
Case Study #1: An Asthmatic Child in Chomedey Finally Sleeps Without Medication
Persistent Symptoms Despite a Clean Home
In a semi-detached home in Chomedey, a single mother reached out to us in distress: her 8-year-old son suffers from severe asthma. Yet, no visible signs of moisture or mold had been identified by doctors or within the home. Despite keeping the house spotless, the child woke up every night with a chronic cough that worsened in winter.
AirGreen Diagnosis: Complete Lack of Air Exchange
Our technicians quickly identified the root of the issue: no mechanical ventilation system had ever been installed. The indoor air was stagnant, saturated with CO₂, fine dust, and allergens from materials. With the installation of a high-performance heat recovery ventilator (HRV) equipped with a HEPA filter, we ensured continuous, filtered, and balanced air exchange, without any heat loss.
Tangible Results: No More Nightly Medication
Two weeks after the installation, the mother called us in tears: her son finally sleeps through the night without medication. Within a few months, his doctor even scaled back his preventative treatments. A powerful example of how a proper HVAC ventilation system in Laval can make a world of difference.
Case Study #2: Productivity Restored in a Duvernay Office
Fatigued Employees and Frequent Headaches
A small Laval business in a semi-open office space noticed a troubling pattern: widespread fatigue by midday, complaints of headaches, and reduced productivity. HR initially blamed stress or screen time. But after several staff members quit, management called on AirGreen for a thorough assessment.
Technical Inspection: No Ventilation, High CO₂ Concentration
Using our measurement tools, we detected carbon dioxide levels exceeding 1,500 ppm by afternoon — well above the recommended comfort threshold of 800 ppm. This clearly explained the chronic fatigue and headaches.
Our Solution: Smart Sensor Ventilation System
We designed and installed a discreet ductwork system, paired with a fresh air exchanger featuring smart sensors that automatically adjust airflow based on ambient CO₂ levels. This custom-built solution blended perfectly with the architecture and required no major renovations.
Direct Impact: Improved Morale and Focus
One month later, employees were unanimous: “The air feels lighter, fresher, we’re not as tired.” Management even asked us to implement a second installation in another location on the North Shore. An investment that enhanced both health and performance across the team.
Case Study #3: Rental Unit in Laval-des-Rapides Free of Mold and Odors
A Tenant Bothered by Persistent Odors
In a multi-unit building in Laval-des-Rapides, a tenant had been complaining for months about persistent odors in the bathroom and kitchen, despite proper cleaning. After multiple visits by the landlord, we were called in for a deeper investigation.
AirGreen Analysis: Moisture Accumulation with No Proper Extraction
We discovered that the bathroom fans and kitchen range hood were undersized and not vented outside. The result: moisture buildup, condensation, and mold growth inside the walls.
Swift Action: Targeted Ventilation and Duct Cleaning
We replaced the old fans with high-efficiency models vented directly outside and equipped with automatic humidity sensors. We also conducted a full cleaning of the existing ducts, eliminating all traces of mold spores and grime.
Immediate Transformation: Comfort and Health Restored
Unpleasant odors vanished within 48 hours. A month later, the walls were repainted, and the tenant renewed her lease. The landlord acknowledged that lack of proper ventilation was hurting his property value and planned similar installations in two other units.
Why These Cases Reflect the Reality in Laval
Laval: A Growing Residential Area, But Often Poorly Ventilated
Many residential and commercial buildings in Laval — old or new — are poorly or not at all ventilated, particularly mid-sized homes. This is often due to outdated building practices, past gaps in regulation, or simple oversight.
Poor Ventilation Can Lead to Chronic Health Issues
Science confirms it: poor ventilation contributes to asthma, migraines, respiratory infections, and even cognitive disorders. At AirGreen, we’ve made indoor health a top priority, and every installation is designed to genuinely improve our clients’ daily lives.
Our Approach: Customized Ventilation for Every Need
Free, No-Obligation Technical Assessment
Every project begins with a complete analysis of air quality, room layout, type of occupants, and specific needs (allergies, humidity, cooking, etc.).
Fast, Clean Installations with Personalized Follow-Up
Our certified installers work quickly and cleanly, with meticulous attention to detail. We always provide post-installation support, including fine-tuning if necessary.
Quality Products: HRVs, ERVs, Sensors, HEPA Filters
We use only top-quality ventilation equipment, including products eligible for Quebec energy-efficiency grants.
When to Act? At the First Signs of Discomfort
Stale indoor air isn’t always noticeable. But if you’re frequently experiencing fatigue, coughing, odors, or moisture at home or work — it’s time to take action. At AirGreen, we’re here to assess, advise, and install a lasting, cost-effective, and discreet solution.