Installation above a patio door for discreet and effective comfort all year round
At AirGreen , we installed a Sharp wall-mounted heat pump in an apartment in Saint-Lambert . The setting is typical of South Shore housing: a living room opening onto an exterior balcony via a glass patio door equipped with vertical blinds . The indoor unit is located above the lintel , in the immediate vicinity of the opening, in order to optimize air diffusion in the living area without encroaching on the existing layout.
Context and objectives of the project
The client wanted:
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reliable heating in winter to limit the use of electric baseboards;
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quiet air conditioning in summer ;
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a clean visual integration around the patio door, with a discreet cover and the shortest possible passage to the balcony.
Choosing a Sharp wall-mounted heat pump meets these criteria thanks to its Inverter modulation , its low noise signature and its air quality filters (Sharp technology).
Design: implanting the head in the right place
We have chosen to install it at the top of the wall , a few centimetres from the ceiling, to encourage:
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a wide sweep of air along the bay window;
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controlled stratification in heating mode (hot air naturally descends into the occupied area);
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the release of side walls for furniture.
The presence of vertical blinds and the rod requires precise clearances: the opening angle of the blower shutter has been adjusted to avoid any contact and to direct the flow towards the heart of the living room rather than onto the windows.
Technical details of the installation
Refrigeration and aesthetic journey
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Single opening through the envelope, immediately adjacent to the patio door, to reach the balcony.
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White vertical capping along the left doorframe , grouping together refrigerant lines , supply and drain . This solution keeps the finish simple and reversible for possible maintenance.
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Reduced total length (only a few meters), guaranteeing optimized yields and minimal pressure losses .
Condensate management
We opted for gravity drainage with a continuous slope towards the outside. The outlet point is sheltered from the elements, limiting any risk of backflow or frost . A flow test confirmed the unimpeded drainage.
Outdoor unit (balcony)
The condenser is installed on the balcony , at a regulatory distance from the railings and walls to ensure good air intake . Anti-vibration pads reduce the transmission of micro-vibrations to the balcony floor, which improves acoustic comfort both inside and for the neighborhood.
Food and safety
An external disconnect box is installed near the unit. The wiring follows the same technical cover as the lines, under UV sheath . The assembly is connected to a dedicated circuit breaker , compliant with the Electrical Code and RBQ/CCQ requirements.
Commissioning: AirGreen protocol
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Nitrogen leak test on the connections.
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Deep vacuum with micron stability control.
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Checking for superheating and subcooling based on actual piping length.
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Acoustic control at low and medium speeds, then calibration of comfort parameters (blowing angles, auto speeds, set temperatures).
The result is in line with expectations: uniform airflow , rapid temperature rise in winter and effective cooling in summer, without unpleasant drafts for occupants sitting near the bay window.
Performance and advantages of the Sharp solution
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Inverter technology : continuous modulation, energy savings and reduced wear .
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Air quality : efficient filtration on the interior head, beneficial in an open living room.
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Quiet operation : at steady state, the noise level is barely perceptible , ideal for a stay.
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New generation refrigerant (R-32) on the recent Sharp range, with reduced warming potential compared to older generations.
Best practices in a room with a patio door
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Blowing direction : avoid directing cold air towards the window to prevent recycling and local condensation .
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Release the clearance in front of the vent; the blinds should slide without touching the unit.
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Minimum ceiling clearance respected to allow correct suction and maintenance .
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Winter drain protection : Ensure that the exterior outlet is not blocked by snow.
Maintenance recommended by AirGreen
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Clean filters every 4 to 8 weeks during periods of heavy use.
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Annual inspection : refrigeration/electrical check, drainage test, gentle cleaning of the external exchanger.
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Good practice : Recommended settings of 20–21°C in winter and 23–24°C in summer, with moderate deviations at night to maximize inverter efficiency .
Compliance and Grants
Our installation complies with RBQ/CCQ standards and Sharp guidelines (tightening torques, vacuum gauge, charge additions if required).
Depending on the capacity selected and the model's performance , the heat pump may be eligible for energy efficiency programs applicable to Greater Montreal . We support our customers in Montreal, Laval, Longueuil, North Shore and South Shore for eligibility verification , file preparation (detailed invoices, serial numbers, photos) and submission .
What the customer gains with AirGreen
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Smart installation above the patio door;
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Short refrigeration path and discreet hood for a clean finish;
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Silence and comfort every day;
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Turnkey service : study, HVAC installation , commissioning , subsidies and HVAC maintenance .
Conclusion
This Sharp wall-mounted heat pump installed in Saint-Lambert illustrates AirGreen's expertise: sober engineering , careful execution and rigorous commissioning to deliver four-season comfort with impeccable integration around a patio door. The system is ready to face both extreme cold and hot days , while controlling operating costs .