Installation of a Sharp wall-mounted heat pump in Rosemont–La Petite-Patrie

The client context: a refurbished home that requires comfort without compromise

In this typical Montreal plex, the indoor unit crowns a freshly renovated room: light walls, finished ceilings with recessed lighting, air circulation to be optimized without cluttering the space. The owner was looking for:

• a discreet wall-mounted device,

• efficient additional heating in winter and precise cooling in summer,

• a minimum noise level for teleworking,

• a clean layout, without visible ducts, in order to preserve the aesthetics of the room.

At AirGreen , we recommend a recent Sharp wall-mounted heat pump (new generation refrigerant), renowned for its fine modulation, humidity management and reliability in the cold climate of Greater Montreal.

Why Sharp for this project?

• DC Inverter Modulation : The unit adjusts its power exactly to meet actual needs. The result: fewer jolts, greater comfort, and energy savings.

• Silent operation : the internal head favors laminar flow, the fan remains almost imperceptible in cruising mode.

• Air treatment : multiple filtration, motorized shutters and wide diffusion to homogenize the temperature, perfect for a room with a relatively low ceiling.

• Easy maintenance : washable filters and easy access to the front housing for cleaning and preventative HVAC maintenance .

Part analysis and positioning of the inner head

The chosen location under the ceiling, in the center of a clear wall, offers:

• a rectilinear diffusion along the entire length of the room,

• a clear air return (no bookcases or curtains nearby),

• an exemplary visual integration in a minimalist decor.

The proximity of a recessed ceiling fixture requires precise timing to avoid dust deposits caused by air movement. Our technicians adjust the angle of the louver in cooling mode to direct the flow slightly downward and forward, and in heating mode to sweep the occupied area without blowing directly onto the occupants.

Refrigeration and drainage route: clean, short and durable

In order to maintain impeccable walls, we favor a rear drilling behind the interior head, with a direct outlet to the outside on the courtyard side. The condensate drain is managed by gravity (continuous slope), which eliminates noise and the maintenance of a pump. The deoxidized copper refrigeration connections are flared to the couple with new rings, insulated with high-density foam and sealed with the vapor barrier on the wall penetration side.

Externally, the connections and communication cable are neatly covered (capping matching the facade), fixed on stainless steel anchors to withstand freeze-thaw cycles. The reduced total length of the circuit further improves seasonal performance.

Electricity and commissioning

• Dedicated circuit compliant with Code, breaker sized to unit's amperage rating and certified copper wiring.

• Nitrogen leak testing , deep vacuum down to <500 microns, stabilization and vacuum resistance testing.

• Launch with measurements: intensity, supply/return temperature, delta-T, verification of the shutters and the room sensor.

• Setting automatic modes , locking setpoints to avoid unnecessary variations and clock calibration for daily programming.

Real comfort: what the customer feels

• In summer, the room quickly reaches the set point without unpleasant cold drafts thanks to the wide diffusion .

• During the off-season and then in the middle of winter, the temperature rise is gradual and stable: the heat pump modulates, maintains humidity at a comfortable level and reduces on/off cycles.

• The low noise level is particularly appreciated during video conferences and movie nights.

Energy performance and assistance programs

Recent Sharp wall-mounted heat pumps operating with new low-GWP refrigerants, with extreme cold heating capacity, are generally eligible for assistance programs in effect in Quebec (depending on the model/capacity combination and official criteria). We support our customers in Montreal , Laval , Longueuil , North Shore and South Shore for:

• check eligibility according to power and yields,

• compile the file (proof of installation, serial numbers, photos),

• optimize the choice of capacity to balance subsidies, purchase cost and operating economy.

Salient installation details on this site

• Wall finish preserved : no visible interior cover; rear drilling clean and sealed.

• Optimized clearances under finished ceiling with recessed; orientation of the shutters adjusted to avoid over-cooling areas.

• Quiet gravity drain , controlled slope and protected exterior exit.

• Short refrigeration length : better efficiency, lower pressure loss.

• Anti-vibration mounts under the outdoor unit (out of view) to preserve peace and quiet and the facade.

HVAC usage and maintenance tips

To maintain performance and air quality:

1. Clean filters every 4 to 8 weeks during peak season.

2. Keep the setpoint stable (deviations of 1–2°C are sufficient).

3. For heating, point the shutter slightly downwards to sweep the occupied area; for cooling, aim more horizontally to limit the direct feeling.

4. Clear the outdoor unit of snow and leaves; maintain a clearance of 30–60 cm around and above.

5. Schedule an annual visit : electrical inspection, thorough cleaning of the evaporator and condenser, check of the drain crawl space, update of parameters if necessary.

Pitfalls to avoid in Montreal housing

• Undersize by thinking only of the surface area: orientation, insulation, ceiling height and internal contributions count just as much.

• Poorly positioning the head in a niche or facing an obstacle: diffusion becomes uneven and humidity is poorly managed.

• Neglecting the drain : an insufficient slope causes excessive humidity and safety triggers.

• Forget about acoustics : suitable supports and anti-vibration devices prevent resonances on adjoining walls.

Result: a beautiful, comfortable and energy-efficient room

The installation of this Sharp wall-mounted heat pump in Rosemont–La Petite-Patrie ticks all the boxes for a successful HVAC installation project: aesthetics, silence, efficient air conditioning and heating, and easy maintenance. The client now benefits from four-season comfort perfectly suited to urban life in Greater Montreal .

Why AirGreen

• HVAC specialists in Greater Montreal: Montreal , Laval , Longueuil , North Shore , South Shore .

• Consulting approach: we size, install, then provide support for subsidies and maintenance.

• Quality of execution : leak tests, deep vacuum, tightening torques, wall finishes, personalized adjustments.

• After-sales service : annual follow-ups, maintenance reminders, genuine parts and rapid diagnostics.

Looking for smart, discreet, and sustainable comfort for your apartment building, condo, or home? Our team can recommend the Sharp solution or equivalent best suited to your space and your energy-saving goals.