An Invisible Threat in Quebec Homes: How AirGreen Transformed a High-Risk Basement into a Healthy Space
In several residential areas across the North Shore, radon poses a silent and often underestimated threat. This natural, colorless, and odorless radioactive gas can seep into basements and endanger the health of occupants. At AirGreen, we were recently called in to intervene at a family home in Blainville after the owners detected radon levels far above recommended safety thresholds. Here's how a custom-designed HVAC ventilation system restored a healthy and long-lasting environment for the whole family.
Understanding the Root of the Problem: Radon and Indoor Health
Radon results from the natural breakdown of uranium in the soil. It enters homes through cracks in the concrete slab, drains, or around plumbing penetrations. On the North Shore, especially in homes with older or poorly sealed foundations, the issue can be worsened by insufficient or poorly distributed ventilation.
In this particular case, the family had recently renovated their basement into a playroom and office. After purchasing a long-term radon detector, they discovered a level above 500 Bq/m³, well above the 200 Bq/m³ safety limit recommended by Health Canada.
AirGreen's Diagnostic: Inspection, Analysis, and Recommendations
Our team conducted a comprehensive analysis of the existing HVAC environment, examining airflow rates, airtightness, and the air exchange rate in the basement. We discovered a near-total absence of active ventilation, which was enabling radon buildup.
Our solution: install a mechanical ventilation system with a heat recovery ventilator (HRV), precisely calibrated to ensure continuous, efficient air renewal in the basement while minimizing energy loss.
A Targeted, High-Performance Ventilation Solution
The Technical Choice: Lennox HRV5-150 HRV
For this single-family home, we selected the Lennox HRV5-150, a heat recovery ventilator designed for northern climates like the North Shore. This HRV handles up to 150 CFM, ideal for enclosed basements from 600 to 900 sq. ft.
Technical specifications:
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Maximum airflow: 150 CFM
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Quiet ECM motor
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Heat recovery efficiency: 75%
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Integrated MERV 8 filtration
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Programmable digital control
Custom Installation: Discreet, Efficient, High-Performance
We positioned the fresh air intakes and exhaust outlets at strategic points throughout the basement to ensure optimal removal of stale air. The unit was installed in a utility closet, with acoustic ducting to reduce noise to under 1 sone. The airflow distribution was designed to avoid short-circuiting and to maximize coverage of the most frequently used areas (office, playroom, laundry room).
Commissioning and Performance Testing
After installation, we measured post-installation radon levels along with airflow and pressure tests. The result: levels dropped to under 70 Bq/m³, a dramatic improvement, confirmed by a 90-day follow-up.
Client Testimonial: A Transformed Daily Life
“We were scared for our kids’ health. AirGreen gave us a concrete, fast, and discreet solution. Since the installation, the air feels fresher, we sleep better, and most importantly, we feel safe. Thanks to the whole team!”
This feedback highlights the importance of indoor air quality and the positive impact a well-designed HVAC intervention can have on a family’s daily life.
Why Choose AirGreen for Residential Ventilation on the North Shore
Our HVAC Expertise at Your Service
At AirGreen, we don’t offer standard solutions. Every installation is based on a personalized assessment, tailored to our client’s needs, their home’s configuration, and local energy constraints.
We bring together:
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Advanced technical expertise in controlled mechanical ventilation
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A deep understanding of the North Shore’s climate realities
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Equipment from trusted brands like Lennox, Fantech, Aldes, Vanee
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A human, educational, and transparent approach
Available Grants
Ventilation projects that improve indoor air quality may qualify for environmental subsidies, whether through municipal or provincial programs. We guide our clients through the administrative steps to maximize financial assistance.
Expert Advice: When Should You Consider Mechanical Ventilation?
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If your basement is finished but lacks a heat recovery ventilator
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If you’ve detected high radon levels
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If you notice persistent odors or a heavy feeling in the air
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If you suffer from allergies or frequent indoor headaches
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If you want better thermal comfort and air quality
A simple, well-installed mechanical ventilation system can prevent major health risks, reduce excess humidity, improve comfort, and increase your property’s value.
Conclusion: One Installation, One Transformation
This project on the North Shore proves the effectiveness of custom HVAC solutions by AirGreen. Thanks to a targeted and high-performance ventilation system, one family regained a healthy, radon-free environment for an affordable and lasting investment.
At AirGreen, we firmly believe that every home deserves impeccable air quality. That’s why we’re committed to offering tailor-made solutions, installed with precision, tested scientifically, and backed by a real client relationship.