A clean, neat installation designed for Montreal winters
In a typical brick plex in Rosemont–La Petite-Patrie , our team installed a Sharp Eco Inverter wall-mounted heat pump designed to provide four-season comfort with low consumption. The client's goal: to cool the home in the summer, ensure stable heating during the off-seasons, and reduce the electricity bill without compromising the aesthetics of the facade. We adapted the layout to preserve the building envelope, facilitate maintenance, and anticipate the challenges of snow and frost specific to Montreal .
Summary of the need
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Replace the intensive use of electric baseboards with an inverter heat pump .
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Minimize the visual and noise impact in the side yard.
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Remain compliant with municipal regulations and electrical standards.
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Preserve the masonry and ensure condensate drainage without risk to the foundation.
Why a Sharp Eco Inverter for this project?
Sharp Eco Inverter units feature fine modulation of the compressor: the machine continuously adjusts its speed to provide just the energy needed. In concrete terms, this results in:
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Temperature stability in rooms without unpleasant fluctuations.
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Measurable savings compared to on/off systems.
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Discreet operation (reduced noise pollution), valuable in dense environments such as Rosemont–La Petite-Patrie .
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Efficient heating performance down to low temperatures, an essential criterion for eligibility for Quebec subsidies when the chosen model meets the required performance thresholds.
Depending on the room served, we size the indoor head at 9,000 to 12,000 BTUs for a typical double-plex living room. The unit installed here easily handles summer cooling loads while providing comfortable heating in spring and fall, backing up to a primary heater if required during extreme cold.
Installation details: a respected facade and easy maintenance
Positioning the outdoor unit
The Sharp outdoor unit is fixed on galvanized wall brackets above the plastered base, approximately 1.1 m from the finished floor . This positioning:
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protects against snow accumulation,
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facilitates the flow of defrost water,
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frees up the ground slab (no concrete slab required),
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makes maintenance and defrosting operations accessible.
We add anti-vibration pads to break the structural transmission of noise to the brick and interior. The orientation leaves the rear clear for condenser ventilation , and meets the required clearances on the sides and front.
Refrigeration and aesthetic journey
The refrigerant lines and communication wiring run in vertical brown capping (coordinated with the brick) along the rainwater fall before entering the indoor unit. The direct route, approximately 3 m to 4 m , reduces pressure losses, simplifies drain drawing and provides a clean visual appearance. The flare fittings are torqued and checked with nitrogen, then leak tested and vacuum drawn to 500 microns before opening the fluid.
Condensate management
The gravity drain is preferred: continuous slope, outlet far from the facing and the foundation joint, termination on a bed of white stone to avoid splashing on the plaster. In the absence of a natural slope, we would have opted for a silent condensate pump with a current cut-off, but here the topography of the wall allows for simple and reliable drainage.
Electrical connection and safety
An outdoor disconnect box is installed within easy reach of the unit, in accordance with the Code. Power is supplied from a dedicated circuit breaker in the indoor panel, with wiring sized to the Sharp's amperage rating. Grounding is verified, cable glands are sealed, and clearly marked for maintenance.
Masonry protection
To cross the brick without weakening the facade:
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low-impact drilling,
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stainless steel dowels and appropriate sealing,
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PVC sleeve at the crossing,
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resealing of the joint with masonry-compatible elastomer sealant.
This method prevents infiltration and preserves the aesthetics of the wall.
Inside: even diffusion and low draft
The wall-mounted head is positioned high in the main living area to promote stratification and range. The installation avoids obstacles (partition corners, beam overhangs) and ensures a wide sweep . The adjustable vanes limit direct air currents in the relaxation area. The sound level is calibrated at low speed in night mode, an element appreciated in buildings near bedrooms.
Deadlines, coordination and respect for the neighborhood
In this lively area of Montreal , we coordinate delivery , access and tools (stepladders, vacuum draw, halogen detector) to limit the duration of the work to one day . Residents are informed of potential noise slots (drilling and sealing). We leave the site clean, brick residue is collected and the wiring is covered without dangling elements.
Results measured after commissioning
Upon delivery, we proceed to:
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checking pressures and temperatures (superheating/subcooling),
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compressor intensity measurement ,
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calibration of the remote control and modes (heating, air conditioning, dehumidification, auto),
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explanation of good HVAC maintenance reflexes (cleaning filters, clearing around the condenser, automatic defrosting).
The customer immediately notices a drop in humidity levels in the summer and a more uniform level of comfort . Operating costs decrease, especially in the spring and fall when the heat pump takes over from the baseboards.
Grants and Compliance: What You Need to Know
High-performance wall-mounted heat pumps may be eligible for the Montreal, Laval, Longueuil, North Shore, and South Shore programs when their performance meets the required thresholds (low temperature heating, high SEER/HSPF ratings). At AirGreen, we:
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let's check the model's approval ,
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prepare the documents (AHRI numbers, detailed invoicing),
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guide the client in submitting evidence,
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advise on insulation and sealing to maximize gains.
Common pitfalls avoided on this type of building
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Unit installed too low : risk of blockage by snow and noise from icicles. → Mount on brackets at the correct height.
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Poorly directed drain : infiltration at the foot of the wall. → Outlet on mineral bed with controlled slope.
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Exposed cable : aging in the sun. → Stabilized UV capping , short route.
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Improvised drilling : brick cracking. → Suitable tools, sleeve and sealing.
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Undersizing : device overloaded in summer. → Simplified thermal load calculation room by room before choosing BTUs .
Recommended maintenance for longevity
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Clean the head filters every 2 to 3 months.
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Clearance around the condenser: 60 cm at the front, branches and leaves removed.
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Annual inspection : pressures, electrical connections, defrost pan, mechanical tightening.
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In winter, check that snow is not obstructing the suction.
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Avoid high-pressure washing on the outdoor exchanger.
Why entrust your installation to AirGreen?
At AirGreen , we combine site engineering , masonry care and electrical rigor. Our teams operate every week in Montreal, Laval, Longueuil, on the North Shore and the South Shore . We offer:
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a load study for correct sizing,
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a clean installation with durable materials,
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grant assistance and documented commissioning,
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accessible and responsive after-sales service .
Are you looking for a similar HVAC installation , with a wall-mounted heat pump tailored to your home? We'll schedule an on-site visit and provide a clear quote, including mounting options, matching capping , and routing scenarios (gravity or condensate pump if necessary).