The challenge of sleep disrupted by noise… even the kind you barely hear
In the quiet residential neighborhood of Fabreville in Laval, a family of five — two adults and three children — was dealing with an unusual problem: despite having a well-insulated, properly heated and cooled home, no one was sleeping well. Two of the children, who have sensory hypersensitivity, found even the faintest background hum to be a major disturbance. The family had tried everything: acoustic curtains, upgraded insulation, earplugs… but nothing made a difference.
It was only after consulting a sleep specialist that a new factor was identified: the central ventilation system was generating continuous micro-vibrations and overly direct airflow — invisible, but clearly noticeable at night.
That’s when our AirGreen team was brought in to design a ventilation solution that would be ultra-quiet, perfectly balanced, healthy, and especially compatible with the neurological and physiological needs of a sensitive household.
Technical diagnosis: a good ventilation system… poorly adapted to real needs
During our first visit, we made several key observations:
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The existing air exchanger was a basic model with a non-ECM motor, producing a continuous hum of 43 dB inside the ducts
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Grilles were poorly placed: some were blowing air directly toward the beds, creating thermal discomfort
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No humidity or CO2 sensors were installed, causing the system to run at full capacity even at night, without any modulation
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The noise wasn’t perceptible to the average adult, but to this family, it felt constantly present
An AirGreen custom solution for total silence… and total freshness
To meet this highly specific request, our technicians designed a completely rethought setup, with a focus on noise reduction, intelligent airflow control, and optimal nighttime comfort.
Here’s what we did:
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Replaced the old air exchanger with a Lennox HRV-70 ECM ultra-quiet model, rated at just 1.2 sones, with a continuously modulating motor
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Added double-insulated acoustic ducts to dampen sound vibrations throughout the entire system
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Repositioned supply grilles strategically, with discreet deflectors to direct airflow away from sleeping areas
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Installed an iComfort® smart controller, with a personalized schedule: reduced operation at night, higher airflow in the morning and evening
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Integrated CO2 and humidity sensors in main rooms to enable real-time dynamic adjustment
Results noticed within the first week
The results were not only measurable — they were immediate:
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Ventilation noise reduced to under 25 dB in the bedrooms, according to our sound level meter
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Improved sleep quality among the children, based on sleep journals kept by the parents
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No sensation of drafts or direct airflow, thanks to the redirection strategy
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17% drop in energy consumption related to ventilation, thanks to intelligent modulation
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Pleased with the outcome, the father even installed a connected sensor to monitor CO2 levels in real time
A relieved mother’s testimonial
“This is the first time in years that my children are sleeping through the night without waking up from a noise that we adults couldn’t even hear. AirGreen understood our reality and delivered a solution that’s thoughtful, quiet… and effective.”
Applicable grants and tailored support
Thanks to our administrative team, the family was able to benefit from:
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A $1,890 LogisVert grant, applicable for the installation of an Energy Star–certified air exchanger
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Full support in preparing the required documentation for the provincial program
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An extended 10-year warranty on the ECM motor, exclusively offered by AirGreen
What this unique installation reveals about residential ventilation
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Silence is an often-overlooked factor in HVAC projects, especially in sensitive households
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A good air exchanger can become a problem if it’s poorly installed or misconfigured
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Families with neurodivergent or hypersensitive children require a personalized approach, taking all aspects into account — acoustic, thermal, and psychological
Why AirGreen is the logical choice in Laval and across the North Shore
At AirGreen, we believe that every project deserves attentive listening. This job in Laval is a perfect example of our ability to adapt our HVAC installations to very specific needs, without compromising on quality or discretion.
We operate across Laval, Montréal, Longueuil, the South Shore, and the North Shore, offering custom ventilation solutions supported by high-end equipment, certified technicians, and complete administrative assistance.
Looking for silent ventilation, invisible but effective? Contact AirGreen today for a personalized assessment.