Installation of a Sharp wall-mounted heat pump in Villeray–Saint-Michel–Parc-Extension

Four-season comfort in a room with low ceilings: a Sharp heat pump perfectly integrated into a residential technical room in Montreal

At AirGreen , we have just completed the HVAC installation of a Sharp wall-mounted heat pump in a home located in Villeray–Saint-Michel–Parc-Extension . The room served is a multi-purpose room with a low ceiling , adjacent to a hallway and a service door. This context imposes stricter air circulation , acoustic and duct routing constraints than in a traditional open area. Our goal: to provide reliable heating in winter and efficient air conditioning in summer, without compromising the ergonomics of the space or access to equipment.

Why a Sharp wall-mounted heat pump in this type of space?

Sharp 's new generation wall units ( R-32 refrigerant depending on the range) are recognized for:

• their compactness and a very refined facade which fits naturally into a technical wall;

• Inverter technology , which continuously modulates power to maintain a stable and economical temperature;

• quiet operation ; ideal in a room adjoining a corridor or bedrooms;

• fine management of the air flow thanks to the motorized shutter and the blowing profiles adapted to low ceilings.

In a Montreal environment where winters are demanding, this configuration offers efficient heating down to low temperatures and rapid cooling as soon as the first warm weather arrives.

Initial diagnosis and sizing

Before any installation, we have:

• measured the free height (low ceiling with visible plate joints);

• identified fixed obstacles (technical furniture, door, wall corner, existing conduit);

• assessed the thermal envelope of the room (walls, insulation, infiltration rate) and its use.

The sizing favored a capacity of 12,000 BTU to comfortably cover the volume and allow the corridor to be tempered with the door open. The objective: to avoid oversizing , which is often the source of short cycles, unnecessary noise and poorly managed humidity.

Interior layout: mastering the low ceiling and the exit angle

We positioned the head high on the wall , close to the corner, in order to optimize:

• freedom of suction and discharge despite the drop in ceiling ;

• sweeping the room without blowing directly on the door or the passageway;

• maintenance (sufficient clearance to open the front and access the filters).

The shutter is adjusted with a horizontal attack then a slight dive to roll the air under the ceiling before it falls back evenly. This adjustment limits the stratification typical of low-ceiling rooms.

Refrigeration path: exit on the right, vertical capping up to the ceiling

The photo shows a vertical white capping that brings the connections back to the ceiling at the right edge of the unit. We opted for a short route :

• Single hole behind the unit;

• Vertical rise in the capping to the ceiling, then passage towards the technical shaft leading outside;

• Continuous insulation of lines and sealing at the crossing to eliminate air bridges .

This strategy reduces pressure losses, improves COP and delivers a visually clean result in a room where every centimeter counts.

Condensate management: discreet and silent pump

The external discharge point being located above the level of the device (routed through the ceiling), we have integrated a compact condensate pump :

• minimum slope respected between tank and pump;

• anti-vibration to contain noise;

• anti-siphon and anti-reflux elbow to prevent gurgling;

• simulated flow test with clear water.

Result: no noise pollution and reliable evacuation in summer as well as in dehumidification mode.

Power supply and compliance

In accordance with the requirements of the Quebec Building Code :

• dedicated panel circuit, sized according to the Sharp nameplate;

• external disconnector installed near the condenser;

• clean and identified electrical routing;

• grounding and labeling on the board.

Each refrigeration connection is made with controlled flares , verified tightening torques and plugging during installation to preserve the cleanliness of the circuit .

Commissioning: AirGreen protocol

1. Deep vacuum draw (confirmed vacuum resistance);

2. Factory refrigerant release and leak test (foam, listening, pressure gauges);

3. Electrical check : currents, voltages;

4. Measurement of delta T in cold then in heat;

5. Calibration of the blowing speed for low ceiling;

6. Customer support : filters, usage methods, seasonal best practices.

Challenges encountered and solutions provided

• Low ceiling : we adjust the blowing tangent to the ceiling to project the air far away without direct current on people;

• Passage near a door : positioning and deflectors prevent air short-circuiting when opening;

• Acoustic containment : anti-vibration pads on the outdoor unit and perfect leveling of the indoor plate eliminate hum.

Results obtained after testing

• Immediate comfort at the setpoint, without oscillations;

• Very low noise level , compatible with the use of the room;

• Responsiveness to start-up in cooling;

• Stability in heating mode, even when the service door is opened frequently.

HVAC Maintenance: Simple Schedule

• Pre-filters : vacuum/clean every 4 to 6 weeks in intensive use;

• Internal battery : gentle cleaning as needed, without twisting the fins;

• Outdoor condenser : clear leaves/dust, check thaw drain;

• Condensate pump : annual check of the float and valve;

• Annual AirGreen inspection : pressures, intensities, probes, tightening, condition of insulation and capping .

Regular maintenance preserves the compressor's performance and longevity .

Grants and Eligibility

High-efficiency wall-mounted heat pumps , using R-32 depending on the range, are often eligible for provincial programs when low-temperature and/or Energy Star performance criteria are met. Our team verifies your eligibility , prepares the supporting documents and assists you with the process — whether you are in Montreal , Laval , Longueuil , on the North Shore or the South Shore .

Tips for maximizing savings

• Avoid setting the temperature too low in summer: 23–24°C is sufficient for comfort without over-consumption ;

• In winter, use Heat mode rather than Auto to stabilize regulation;

• Let Auto speed do the work on a daily basis, then reduce in the evening for silence ;

• Keep the door ajar if you want to cool the adjacent corridor.

What this installation says about our approach

• Realistic sizing and not oversized;

• Short cooling path and clean capping for a durable finish;

• Controlled condensate management with silent pump ;

• Instrumented commissioning and clear user training .

AirGreen, your HVAC partner in Greater Montreal

We design and install wall-mounted heat pumps , multi-zone systems and related solutions throughout Greater Montreal . Our promise: an accurate diagnosis , careful installation , exemplary compliance and monitoring that ensure your comfort and savings over time.

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Highlights of the Sharp heat pump installed in Villeray–Saint-Michel–Parc-Extension

• Compact, quiet and efficient wall-mounted heat pump for rooms with low ceilings;

• Optimized blowing to avoid stratification and drafts;

• Clean path : vertical capping, short path, continuous insulation;

• Discreet condensate pump , without noise pollution;

• Quebec-compliant HVAC installation , ready for Montreal winters .

For a similar project — technical room, basement, home office or passageway — our team responds quickly in Montreal , Laval , Longueuil , on the North Shore and the South Shore , with a clear quote and controlled deadlines .