Why not all air exchangers are equal: a detailed guide to choosing the right one in the Montreal, Laval, Longueuil, North Shore, and South Shore regions
In the world of residential and commercial HVAC, the role of air exchangers is often underestimated, even though they are a crucial lever to ensure healthy air quality, optimal energy efficiency, and lasting comfort. At AirGreen, we see daily during our installations in Montreal, Laval, Longueuil, on the North Shore and the South Shore, that many homes and buildings still use outdated, inefficient, or poorly installed air exchanger models. This exclusive comparison aims to clearly demonstrate the significant difference between a high-performance air exchanger and a basic model, based on our field experience and real projects.
Understanding the fundamental role of an air exchanger in an HVAC system
An air exchanger, whether of the HRV (heat recovery ventilation) or ERV (energy recovery ventilation) type, is designed to renew indoor air without compromising the building’s energy performance. It extracts stale air from humid rooms (bathroom, kitchen, laundry) and injects fresh air from outside, balancing temperature and humidity levels through a recovery core.
A good air exchanger:
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Eliminates excessive humidity and prevents mold.
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Significantly reduces indoor pollutants.
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Improves comfort in all seasons.
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Optimizes energy consumption when properly sized and integrated into the HVAC system.
A basic or poorly configured model:
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Can increase heat loss.
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Promotes air pressure imbalances.
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Does not effectively filter pollutants.
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Can cause condensation, noise, or even deterioration of certain materials.
Case study: a successful installation in Longueuil
In a recent residential project in Longueuil, our team was called to replace an old single-speed, noisy, and inefficient air exchanger installed in a 1998 house. The client complained of poor air quality, unpleasant drafts in winter, and a high humidity level in the basement.
After a complete analysis including an airflow test, precise measurements, and a study of existing ducts, we recommended a VRE air exchanger with ECM motor, equipped with an ultra-efficient enthalpic energy recovery system, model Venmar AVS® E15 ECM.
Results after installation:
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Humidity rate stabilized at 40-45% throughout the winter.
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Noticeable reduction of cooking and humidity odors.
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Significant air quality improvement measured by VOC sensors.
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Quiet thanks to its variable speed ECM configuration.
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Heating bill reduction thanks to energy recovery.
Technical comparison: high-performance vs basic
| Criteria | Basic model | High-performance model (e.g., VRE ECM) |
|---|---|---|
| Motor type | Standard PSC motor | ECM motor (high efficiency, quiet) |
| Type of recovery | Heat-only core | Enthalpic core (heat + humidity) |
| Filtration | Foam or 1" MERV 4 filter | High-efficiency MERV 13 filter available |
| Noise level | High | Low (optimized acoustic design) |
| Smart control | None or manual | Digital interface, programming, Wi-Fi |
| Eligible grants | Not eligible | Yes (up to $1,200 via LogisVert) |
| Estimated lifespan | 5 to 8 years | 12 to 20 years depending on maintenance |
Grants and standards: what many don’t know
Did you know that several advanced models of ENERGY STAR certified air exchangers qualify for government grants under the Hydro-Québec LogisVert program? This financial aid can be up to $1,200 for a single-family home or eligible dwelling, provided the installed unit achieves a sensible recovery efficiency (SRE) of at least 65% according to HVI standards.
At AirGreen, we ensure:
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Select only eligible units.
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Manage the grant application for you.
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Provide all required technical documents.
Practical tips for choosing the right air exchanger
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Never base your choice solely on price.
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Avoid units without HVI (Home Ventilating Institute) certification.
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Consider the number of occupants and the total building area.
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Choose models with ECM motors for maximum efficiency.
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Request a complete evaluation before purchase.
Our expertise: a turnkey service
At AirGreen, we don’t just install a device. We size each air exchanger according to the specific needs of the building, its occupants’ habits, and the local environment. Our specialized technicians perform installations:
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Custom-made, complying with RBQ standards and TEQ guidelines.
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Clean and safe, by optimizing ducts and air intakes.
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Fast and guaranteed, including a complete post-installation check.
Common errors observed in the field
Here’s what we regularly correct during our service calls:
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Poor duct orientation (air discharges in inhabited areas).
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No slope in condensation drains.
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Devices not cleaned for over 5 years.
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Undersized models for the home.
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No airflow calibration after installation.
All these errors harm the overall performance of the HVAC system and can endanger indoor air quality.
Customer testimonial in Laval
Ms. Richard, owner of a duplex in Laval, recently thanked us for installing a Venmar EVO5 700 HRV air exchanger, a balanced model with MERV 13 filter:
"Since you replaced our old unit, we really feel the air is lighter. My asthmatic son no longer has nighttime attacks. Thanks to the whole team."
Conclusion: an investment worth every penny
Choosing a high-performance air exchanger means choosing comfort, health, durability, and reduced energy costs. It’s not just a purchase, but a smart investment for any home or building.
At AirGreen, we support you every step of the way, from choosing the right device to obtaining subsidies, to flawless installation.
Request your free quote today.