Client objectives and choice of solution
At AirGreen , we are assisting a Chomedey homeowner who wants to air condition the main living area and benefit from efficient heating in the spring and fall, while preserving traffic flow along the side driveway. We recommend and install a Sharp wall-mounted heat pump (ZU1 range with R-32 refrigerant) . This choice meets three priorities: energy efficiency , quiet operation and discreet integration on a vinyl siding facade typical of Laval 's residential areas.
Why the Sharp heat pump (ZU1 R-32 range)
-
R-32 : Better heat transfer and lower GWP than R-410A, improving overall efficiency and environmental footprint.
-
Precise inverter : fine modulation of the compressor to maintain a stable temperature with fewer on/off cycles.
-
Air treatment compatible with Sharp indoor units incorporating ionization functions ( Plasmacluster technology), useful for healthier daily comfort .
-
Local parts availability and simplified service , an advantage for annual HVAC maintenance .
HVAC installation methodology: rigor and respect for the site
Installation on wall brackets : stable, clear, accessible
The condenser is mounted on sturdy galvanized brackets . Blue anti-vibration pads provide damping and limit sound transmission to the floor covering. The calculated elevation allows for:
-
to avoid the accumulation of snow and debris;
-
to facilitate the flow of condensates during defrosting;
-
to ensure free ventilation around the exchanger.
Managing a narrow passage with a fence
The side driveway is constrained by a chain-link fence on one side and the facade on the other. We strictly adhere to the recommended clearances for air intake and discharge, avoiding any recirculation effect. The unit's orientation is chosen to channel the airflow towards the open area of the driveway, reducing the risk of localized winter frost on the fence.
Power supply: safety and compliance
An external disconnect box , within easy reach, ensures rapid isolation of the machine for maintenance. The dedicated circuit is sized according to the nameplate and the current Code , with verified grounding , calibrated protections, and perfect sealing of the inputs. We carry out the usual checks: voltage drop, tightening, polarity.
Short refrigeration path and neat aesthetics
The refrigeration connection (insulated copper) and the communication cable follow a direct route from the indoor unit, which reduces the linear length (≈ 3 to 5 m ), therefore the pressure losses and the risks of heat recovery. The external casing is installed neatly, with tight radii and junctions, for a clean facade and easy future maintenance.
Condensate drainage
In summer, the wall head operates by gravity : continuous slope of the drain towards the outside, without condensate pump - one less source of noise and maintenance. In winter, we provide a defrost drip zone which does not obstruct the passage or the base of the brackets .
Commissioning: precision and traceability
-
Deep vacuum (≤ 500 microns) and vacuum resistance test.
-
Opening of valves, leak testing and reading of load parameters (pressures, intensity, superheating/subcooling).
-
Blowing temperature and noise level measurements.
-
User settings: Eco , Silent modes, time programming, recommended settings for the climate of Montreal / Laval / Longueuil / North Shore / South Shore .
Results obtained: discreet comfort and tangible effectiveness
Summer comfort and winter support
-
Even and rapid air conditioning in the living area; inverter modulation prevents jolts.
-
In the off-season , the heat pump covers most of the needs at low operating cost (COP > 1), relieving the burden on electric baseboards.
Mastered visual integration
The bracket + cover combination provides a clean and compact appearance. The condenser does not encroach on traffic along the fence and remains easily accessible for maintenance.
Peace and quiet for the neighborhood
The anti-vibration pads and Quiet mode keep noise levels very low. This is valuable in close-knit areas such as those found in Chomedey , Sainte-Dorothée or Duvernay .
Tips for maximizing performance
Winning Settings and Habits
-
Summer setpoint 23–24 °C; winter 20–21 °C.
-
Activate the programming (morning/evening departures) to limit reminders.
-
Internal filters : clean every 4–6 weeks during peak season.
-
Keep 30–60 cm clear around the condenser (snow, vegetation, bins).
Preventive HVAC Maintenance
An annual AirGreen HVAC maintenance includes:
-
gentle cleaning of exchangers;
-
checking drains , fixings and connections ;
-
electrical checks (intensities, voltages), and reading of refrigeration parameters;
-
Updated tips based on site history.
This maintenance extends the lifespan and maintains seasonal yields .
Technical points specific to this project
Implementation details
-
Vinyl facade : careful sealing of holes with vapor barrier sleeve and compatible mastic.
-
Close fence : clearances adjusted to ensure free suction ; no obstacles in front of the discharge.
-
Base and brackets: load distribution, calculated center distances, stainless steel anchors ; free access for defrosting .
-
Reduced refrigeration length : better efficiency, shorter response time, less fluid required than on a longer route.
Challenges encountered and solutions provided
-
Narrow side corridor : direct the air discharge towards the open area and wedge the brackets to free the passage.
-
Risk of recirculation at the closing angle: operational check and adjustment of the inclination of an internal deflector to avoid air short circuit.
-
Winter protection : recommendation of a lightweight snow shield if necessary and inspection after the first storm.
Grants and Document Compliance
Sharp ZU1 R-32 series wall-mounted heat pumps can meet the eligibility criteria of current programs depending on the capacity, the cold version and the SEER/HSPF ratings of the AHRI certified unit. Our team takes care of:
-
performance verification (negative operating range, seasonal efficiency),
-
proof of installation (photos, diagrams, AHRI number),
-
and support for financial procedures in Greater Montreal.
Quick comparison to guide a similar project
Wall-mounted heat pump vs. wall-mounted air conditioner
-
The heat pump offers reversible heating with reduced operating costs in mid-season.
-
Best return on investment for 4-season use in Montreal , Laval and surrounding areas.
Wall-mounted heat pump vs. central heat pump
-
Less invasive work (no conduits), ideal for light renovations.
-
Lower initial investment and simpler maintenance.
-
Possibility of further development in MultiZone for other rooms.
Conclusion: AirGreen expertise at the service of exemplary installation
This HVAC installation in Chomedey demonstrates the perfect balance between efficiency , quietness , and discretion . The Sharp wall-mounted heat pump (ZU1 R-32 series) integrates naturally into the side aisle, without compromising circulation or maintenance. With a short cooling path , an accessible disconnect , and an anti-vibration mounting , the system delivers measurable comfort in both summer and winter—ready to operate for a long time, with minimal but regular HVAC maintenance .
Are you considering a project in Montreal , Laval , Longueuil , on the North Shore or the South Shore ? Our AirGreen team takes care of sizing , installation , maintenance , and grant optimization so that your heat pump offers you the best technology, every day.