Poor HRV Maintenance Can Cost You Much More Than Just a Repair: Here’s What We See in the Field in Montréal and the Surrounding Areas
At AirGreen, we install, repair, and maintain HRV (heat recovery ventilator) systems across Montréal, Laval, Longueuil, the North Shore, and the South Shore. Our team is often called in to solve issues related to comfort, strange noises, or declining energy performance — and in the vast majority of cases, these problems are caused by lack of maintenance.
In this article, we explain why neglecting your HRV maintenance can cost you a lot, the warning signs to look out for, and the concrete actions we recommend to avoid expensive repairs, extend the lifespan of your system, and maintain healthy indoor air.
The HRV: A Silent but Essential Part of Your HVAC System
The HRV (heat recovery ventilator) is designed to renew indoor air while recovering heat from the exhaust air. It usually operates autonomously and quietly, which often leads people to forget it even needs regular maintenance.
However, over time:
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Filters clog, reducing airflow
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Fan motors wear out if overworked
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Heat exchangers get blocked, decreasing efficiency
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Mold can grow inside damp ductwork
Case Study: A Bungalow in Saint-Lambert With a Clogged HRV
A client in Saint-Lambert (South Shore) contacted us because her home was constantly humid, with heavy condensation on the windows and lingering odors. Her HRV, a Venmar Constructo 1.5, had never been serviced in the 6 years since installation.
What We Found:
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Original filters, completely blocked
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Return air ducts filled with dust
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Heat recovery core clogged with organic debris
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Mold inside the unit casing
Result:
We performed a complete cleaning, replaced the filters with certified MERV 8 filters, and recalibrated the airflow. Comfort was restored immediately, the air became drier, and the odors disappeared. The client admitted she regretted not scheduling annual maintenance earlier.
The Consequences of Poor Maintenance on Your HVAC System
A clogged HRV doesn’t just hurt your indoor air quality. It can:
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Force your heat pump or wall-mounted air conditioner to work harder, increasing energy bills
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Affect thermal comfort (air too humid or too dry)
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Shorten the lifespan of your HVAC equipment
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Create conditions for allergies and mold to develop
That’s why at AirGreen, we offer preventive HVAC maintenance services, which include a full HRV inspection and performance recommendations.
How Often Should You Service Your HRV in Montréal?
In a climate like Montréal, where windows remain closed for up to 6 months per year, we recommend:
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Filter cleaning or replacement every 3 to 6 months
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A full inspection by a professional once a year
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Deep cleaning of the heat recovery core every 2 to 3 years
For homes with central or multi-zone HVAC systems, or with pets, increased maintenance frequency is usually necessary.
Residential Project in Laval: Cost-Effective Preventive Maintenance
A homeowner in Chomedey, Laval, has been an AirGreen client since 2021 and enrolled in our preventive maintenance program. His unit, a Lifebreath 195 ECM HRV, receives annual visits from our team. The results:
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Zero breakdowns in 3 years
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Consistent, high-performance airflow
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Optimized filtration with less dust in the home
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Controlled electricity bills
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Boosted property value during a recent home appraisal
What Warning Signs Should You Watch For?
Here are the red flags we frequently encounter during service calls in Montréal, Longueuil, Laval, or the North Shore:
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Persistent musty odors
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Condensation on windows even with the system running
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Stale air in certain rooms
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Unusual mechanical noises (humming, scraping)
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Increased allergy symptoms inside the home
If you notice any of these signs, it’s time to have your air exchanger inspected.
Practical Tips to Extend the Life of Your HRV
Do:
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Set a reminder to replace filters regularly
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Use MERV 8 or higher quality compatible filters
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Rely on a certified professional for servicing
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Clean outside intake and exhaust grilles twice a year
Don’t:
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Ignore strange noises
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Use chemical products to clean internal components
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Run your HRV at full speed non-stop
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Delay maintenance just because “it’s still working”
The AirGreen Approach: Expertise, Transparency, and Precision
We work weekly on residential HVAC maintenance projects in Montréal, Laval, Longueuil, and nearby regions. Our technicians are certified, experienced, and trained to detect invisible failures caused by poorly maintained HRVs.
Our services include:
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Full air exchanger system inspections
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Replacement of certified filters
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Cleaning of ducts and heat recovery cores
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Personalized recommendations to optimize your HVAC system
Client Testimonial: Mr. Bouchard, North Shore
“I thought my air exchanger was working fine. But after AirGreen’s visit, I realized it was running overloaded and reducing my heat pump’s efficiency. Their technician explained everything, cleaned the unit, and installed a proper filter. Immediate results.”
Conclusion
A poorly maintained HRV can cost hundreds—even thousands—in indirect damages. But with regular maintenance by an experienced team like AirGreen, you ensure your HVAC systems last longer, your air stays healthier, and your performance remains optimal.
Don’t let HRV maintenance become a blind spot in your home comfort. Contact AirGreen for a free evaluation, and let us take care of your indoor air quality, day after day, across Montréal, Laval, Longueuil, the North Shore, and the South Shore.