Breathing clean air inside your home or business—especially during spring or fall—can feel like an impossible challenge for people sensitive to seasonal allergies. Yet, a solution often overlooked could make all the difference: the air exchanger. At AirGreen, we’ve seen firsthand—through dozens of service calls across the Greater Montreal area—just how much a properly installed and well-maintained air exchanger can transform the quality of life for those dealing with allergic rhinitis, asthma, or other respiratory sensitivities.
Why is indoor air often more allergenic than outdoor air?
While we naturally assume the outdoors to be the main source of pollen, spores, and other allergens, it turns out that indoor air can be five times more polluted. Why? Because without efficient air renewal, allergens build up: dust, dust mites, pet dander, mold, and fine particles from human activity or building materials. These elements float around, stagnate, and are constantly inhaled, worsening allergy symptoms.
The essential role of the air exchanger in indoor air quality
An air exchanger, or mechanical ventilation system, primarily functions to renew indoor air by removing stale air and bringing in fresh air from outside—filtering it in the process to eliminate a large portion of allergens and fine particles.
At AirGreen, we prefer to install models equipped with high-efficiency filters, such as MERV 13 or HEPA filters, which capture up to 99% of microscopic particles, including pollen, mold spores, and bacteria. The result: cleaner, healthier indoor air—and significant relief for allergy sufferers.
Real-world example: air exchanger installation in Laval for a family with allergies
Last year, we were called in to help a single-family home in Laval where both children suffered from severe seasonal allergies. The home, well insulated, was retaining humidity and allergens. After a thorough ventilation analysis and indoor air quality diagnosis, we recommended and installed a Venmar AVS N Series air exchanger with integrated HEPA filter.
The unit, with a 100 CFM capacity, was installed with an exterior air intake located far from any pollution source (like streets or allergenic trees), and its distribution was optimized using rigid ductwork. After only a few days, the parents noticed a significant improvement: fewer sneezes, less nasal congestion in the morning, and better sleep quality.
Regular maintenance: essential to maintain filtration performance
Even the best air exchangers lose efficiency without proper HVAC maintenance. At AirGreen, we recommend:
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Replacing or cleaning filters every 3 to 6 months
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An annual duct inspection to check for dust or mold buildup
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Monitoring the balance between intake and exhaust airflow to ensure optimal air renewal
Our teams provide this service throughout Greater Montreal, including Longueuil, Laval, the North Shore and the South Shore, offering custom maintenance plans tailored to each occupant’s allergy sensitivities.
Humidity control: a key factor in mold prevention
Excessive humidity creates ideal conditions for mold—one of the worst enemies for allergy sufferers. The heat recovery ventilators (HRVs) we install help maintain a balanced humidity level (between 35% and 50%), preventing the spread of invisible mold within walls, ceilings, or ducts.
Choosing the right air exchanger for your space and sensitivities
Every home is unique, and so are the sensitivities of each family. That’s why we always start with a comprehensive analysis before any installation:
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Air volume to be renewed based on the space’s size
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Number of occupants
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Presence of pets
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Allergy history
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Layout of the existing ventilation system
We offer top-performing brands well-suited for allergen-sensitive environments, including Venmar, Lifebreath, Fantech, Aldes, and Broan.
Why trust AirGreen with your air exchanger?
Our approach is centered around health and comfort. For over 10 years, our certified technicians have been servicing Montreal, Laval, Longueuil, the North Shore, and the South Shore, designing custom ventilation solutions. We don’t just install—we analyze, optimize, and provide rigorous post-installation follow-up.
Available grants: make your health investment more affordable
Programs such as Rénoclimat or local municipal grants offer financial assistance for installing a high-efficiency air exchanger. Our advisors will walk you through these steps to lower your costs while maximizing the health impact of your project.
Expert advice: simple actions to reduce allergens at home
Beyond installing an air exchanger, here are a few tips we regularly share with our clients:
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Vacuum with a HEPA filter twice a week
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Avoid carpets in bedrooms
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Clean your ventilation ducts regularly
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Install a humidity detector in basements
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Keep windows closed during high pollen periods
These measures, when combined with a well-functioning ventilation system, will help create a true indoor sanctuary against allergies.
Conclusion: cleaner air, healthier living
At AirGreen, we believe air quality isn’t a luxury—it’s a necessity, especially for vulnerable individuals. Installing an air exchanger that’s well chosen, well installed, and properly maintained can dramatically improve your day-to-day life by reducing allergy symptoms and enhancing your family’s overall health.
Struggling with seasonal allergies? It might be time to consider installing a high-efficiency air exchanger. Contact us for a free evaluation in Montreal, Laval, Longueuil, or on the North Shore or South Shore.