Residential Ventilation: An Often Overlooked Factor with Costly Consequences
When it comes to home renovations, the focus is too often on aesthetics, materials, or layout, pushing ventilation to the background. Yet, neglecting proper ventilation, especially during major renovations, can lead to long-term costs far exceeding the price of a well-designed HVAC system installed from the start.
At AirGreen, we frequently step in on projects where initial decisions have caused serious complications, especially in the South Shore, where many renovated homes that lacked a technically sound air renewal system have ended up facing humidity issues, mold growth, or even indoor air contamination.
A Real Case from a Renovation in Boucherville: A Striking Example
Recently, our team was contacted by a family in Boucherville who had just completed a full renovation of their single-family home. The visual result was stunning, but just a few weeks after moving in, alarming signs began to appear:
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Persistent odors in certain rooms
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Excess condensation on windows
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Black stains in the corners of walls
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Uncomfortable indoor climate despite a brand-new heating system
Our HVAC technician’s inspection quickly pinpointed the issue: a complete lack of adequate central ventilation. During renovations, the old air vents had been sealed off for aesthetic reasons, without being replaced by a proper, compliant solution.
AirGreen’s Diagnosis and Intervention: Back to the Basics
Our team recommended a comprehensive indoor air quality assessment, followed by the installation of a Venmar AVS S10 200 heat recovery ventilator (HRV), precisely sized to match the layout and square footage of the home.
Key Steps of Our Intervention:
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Thorough inspection of existing ducts, air stagnation zones, and humidity levels
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Calculation of the optimal airflow required (around 150 CFM for this property)
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Installation of the system in the attic to preserve interior design
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Addition of discreet diffusers in key rooms (bathrooms, kitchen, basement)
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Complete system calibration and commissioning, with client training
Consequences of Poor Ventilation During Renovations
Neglected ventilation can have damaging effects on health, building structure, and energy bills. Here are some of the outcomes we’ve seen repeatedly during interventions in the South Shore:
Health Impacts:
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Humidity buildup = mold development
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High CO₂ levels = fatigue, headaches, poor concentration
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Poor air renewal = spread of allergens
Structural Impacts:
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Damage to finish materials (paint, drywall)
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Warped wood, water infiltration
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Shortened lifespan of HVAC equipment
Financial Impacts:
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Cost of decontamination or structural repairs
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Unexpected expenses for mold remediation or water damage
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Premature replacement of heating/cooling units
Why Contact AirGreen Before You Renovate?
We firmly believe ventilation is the invisible foundation of residential comfort. As experts in HVAC installation across the South Shore, we guide our clients from the very start of their renovation projects.
Our Services Include:
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Feasibility studies for mechanical ventilation
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Integration of HRV or ERV systems tailored to the home layout
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Installation of Venmar, Fantech, Lifebreath units depending on needs
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Post-sale service, calibration, and HVAC maintenance
A Word to Renovators: Plan Your Ventilation Before You Build Walls
At AirGreen, we too often encounter situations where we have to open freshly built walls just to run ducts, simply because ventilation was left out of the planning. A well-designed HVAC system should be treated like electrical or plumbing—it’s essential.
AirGreen’s Expertise in the South Shore: More Than Just an Installer
Our experience allows us to differentiate between a standard setup and a truly optimized system for each unique home. In Longueuil, Brossard, Saint-Hubert, and Boucherville, we’ve helped dozens of families improve their indoor air quality, all while optimizing thermal comfort and energy efficiency.
Customer Testimonial: A Life-Changing Difference
“After our renovation, we were desperate because of the constant humidity. AirGreen offered us a custom solution with a perfectly clean and fast HRV installation. Since then, our home is healthy, comfortable, and odor-free. Thank you for your professionalism.”
— The Lambert Family, Brossard
Conclusion: Ventilation Is an Investment, Not an Expense
It’s tempting to postpone ventilation work during a renovation, assuming it’s not a priority. But ventilation directly impacts your home’s health, comfort, and longevity. On the South Shore, local climate and dense housing make this even more critical.
At AirGreen, we help you plan your ventilation smartly, install it seamlessly yet effectively, and ensure your home breathes clean, healthy air all year round.