A well-installed ERV isn’t necessarily well-optimized – and that’s where AirGreen steps in
At AirGreen, we’re out every week servicing homes in Montréal, Laval, Longueuil, the North Shore, and the South Shore, fixing ventilation problems that could be avoided with just a few simple, no-cost adjustments. The truth? Even a high-performance ERV (energy recovery ventilator) can run inefficiently if it’s poorly configured or neglected.
Our technicians know a series of precise steps that can radically improve the performance of an existing system—without replacing the unit, without major work, and without purchasing parts. Here’s exactly what we do, and what you can try yourself (or have our experts verify for you).
Why so many high-end ERV systems are used inefficiently
Even top brands like Venmar, Lennox, Fantech, or Lifebreath can underperform when they’re not adapted to your home’s actual daily conditions:
-
Factory settings are often too generic
-
Humidity sensors are poorly placed
-
Scheduled programs don’t match the family’s real routines
-
Intake or exhaust grilles are partially blocked
-
Clogged filters throw off airflow balance
-
No calibration done for the home’s actual volume
The result: discomfort, dry or humid air, unusual noise, or spiking energy bills.
Technical tips our technicians apply every time
1. Wall controller reset and reprogramming
We assess the household’s daily rhythm (when people are home, activities, cooking schedules, etc.) and reprogram the ERV to run at the right times, with the right airflow rate.
2. Cleaning and repositioning humidity sensors
A sensor placed too close to a steam source (bathroom, kitchen) can trigger over-ventilation. We move it if needed and readjust its sensitivity.
3. Balancing intake and exhaust vents
Our technicians measure actual airflow in and out and make fine adjustments using damper controls to avoid pressure imbalances.
4. Visual inspection of accessible ductwork
We check for crushed, blocked, or disconnected ducts in attics, ceilings, or service walls.
5. Free filter cleaning (if accessible)
A dirty filter can reduce airflow by 20 to 30%, causing noise and poor heat recovery. When possible, we clean it on the spot.
6. Simple maintenance tips for the homeowner
We show clients basic steps they can take every 3 months: remove the filter, dust it off, check the outdoor vent.
Real ERV optimization cases handled by AirGreen
Montréal – Century-old home in Outremont
A Venmar X Series ERV was constantly running at full speed. Our technicians reprogrammed the wall controller to match actual usage times, cleaned the filters, and fixed airflow imbalances. Result: 50% quieter operation and stable humidity.
Laval – Recently built triplex
Residents complained of dry air and sore throats. We found a miscalibrated humidity sensor and unbalanced airflow. After repositioning and manual calibration, the air returned to a comfortable level.
Boucherville – High-end concrete condo
The client reported noisy ventilation in the bedrooms. We found ducts slightly crushed in two areas. Technicians straightened the affected sections, adjusted airflow rates, and updated the scheduling program. Result: peace and comfort restored.
Models frequently optimized by AirGreen without needing replacement
These models are efficient but often require post-installation optimization:
-
Venmar AVS X30ERV ECM
-
Lennox HRV700
-
Fantech VHR150 ECM
-
Lifebreath MAX Series 155 ECM
-
Venmar EVO5 500 HRV
These units are eligible for Hydro-Québec’s LogisVert grants, but to get the most out of them, an AirGreen calibration visit is strongly recommended.
Most common mistakes to avoid according to our technicians
-
Leaving the ERV on “boost” mode all the time
-
Never cleaning or inspecting filters
-
Partially blocking vents with furniture
-
Ignoring alerts on the wall controller
-
Assuming that a “silent” unit means everything is working fine
A silent system can still ventilate poorly. Only a full check-up can confirm that it’s operating properly.
Our promise: zero cost, 100% impact
At AirGreen, we believe the value of a high-performance air exchanger lies just as much in smart maintenance as in the unit itself. That’s why our technicians always include these free adjustments in every maintenance or evaluation visit.
We service all of Montréal, Laval, Longueuil, the North Shore, and the South Shore, helping you maximize your existing ERV’s performance—with no hidden fees or unnecessary parts. One simple visit today can make a big difference tomorrow.