Clean integration on a raised base for uncompromising four-season comfort
Project background
In a renovated plex in Saint-Laurent , the owner wanted a reliable HVAC solution to cool the main living area in the summer and provide efficient heating in the mid-seasons, while preserving the aesthetics of the paved backyard. We recommended a Sharp ZU1 wall-mounted heat pump (R-32, inverter) , known for its stability in extreme cold and its high energy efficiency. The goal: a clean, quiet and easy-to-maintain installation.
Why the Sharp ZU1 (R-32) for Greater Montreal
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R-32 refrigerant : lower charge and better seasonal performance than R-410A, ideal for Montreal , Laval , Longueuil , North Shore and South Shore .
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Inverter compressor : continuous modulation, stable comfort and electricity savings.
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Controlled acoustics : large fan + optimized control electronics to limit noise on the terrace.
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Cold weather reliability : maintains capacity at negative temperatures, reduces backup usage.
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Air quality : Sharp Plasmacluster technology indoors, a significant advantage for extended occupancy.
Technical study and implementation
The site features a rendered wall with a blue-framed French door opening onto stone paving . To preserve drainage slopes and circulation, we place the outdoor unit:
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on a raised aluminum base ,
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with anti-vibration pads (blue),
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away from curbs for optimal air clearance and easy snow removal.
The refrigeration passage is located directly behind the unit, limiting the need for drilling and concealing connections. The short path reduces pressure losses and simplifies maintenance.
Salient installation details
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Raised support : anti-corrosion aluminum frame, height calculated to stay above snow accumulations and defrost freely.
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Fixings : stainless steel anchors and treated bolts; torque control to prevent any shearing in the coating.
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Anti-vibration : silent blocks under the soles to contain the solid transmission to the structure.
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Electrical : Dedicated power supply, service switch within reach, UV sheath and expansion loops provided for freeze/thaw.
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Condensates : gravity drain from the indoor unit to the outside with a continuous slope; no pump required in this configuration.
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Waterproofing : single drilling, air barrier sealing and flashings to preserve the thermal envelope.
Sizing and expected performance
After calculating the load (surface area, orientation, insulation, infiltration, internal inputs), the 12,000 to 15,000 BTU range covers the living area (living room-kitchen-dining room). The Sharp ZU1 offers:
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High SEER/SEER2 for economical cooling during heat waves;
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HSPF/HSPF2 solids on heating;
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fine modulation that stabilizes temperature and humidity levels .
AirGreen process: method and quality control
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Leveling the base and checking the wall's permissible loads.
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Compliant brazing/flaring , systematic replacement of flare nuts and application of R-32 compatible oil.
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Deep vacuum (microns) with maintenance to validate the seal.
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Fluid opening and measurements: pressures, intensities, superheating/subcooling.
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Functional test in cold then in heating; verification of cycle inversion.
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Finish : stainless steel collars, curvature radii respected, mechanical protection of the connections at the edges.
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User manual : instructions for use, maintenance and seasonal adjustments.
Result for the customer
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Immediate and consistent comfort , without gusts of cold air.
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External noise contained thanks to the inverter and silent blocks.
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Minimal visual impact : centered device, discreet wiring, base aligned with the paving joints.
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Clear maintenance access for future interventions.
Best practices on paved terraces
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Avoid laying directly on the ground : raising the height limits snow/water backflow and prolongs its lifespan.
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Respect the front/rear and side clearances (ventilation).
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Preserve the slopes of the paving for the flow of defrosting water.
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Plan winter snow removal : access path, protective stop during storms.
Recommended HVAC maintenance
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Internal filters : monthly rinsing during peak periods.
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Outdoor battery : gentle blowing in spring; leaf clearance.
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Annual AirGreen inspection : electrical checks, refrigeration measurements, tightening of connections, checking of condensate drainage.
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Winter : Keep the space under the appliance clear to avoid ice.
Grants and Eligibility
High-efficiency wall-mounted heat pumps using R-32 , when certified and efficient at low temperatures, may be eligible for programs in Quebec. We support the owner in:
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preparation of files (invoices, photos, technical sheets),
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the choice of settings optimizing the criteria,
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the filing of applications for Montreal , Laval , Longueuil , North Shore and South Shore .
What makes the difference on this Saint-Laurent construction site
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Precise sizing that matches the thermal profile of the home.
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An elevated location designed for the Montreal climate.
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Clean execution : controlled vacuum, clean finishes, protected wiring.
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Sharp ZU1 (R-32) equipment that combines comfort, silence and controlled operating costs.
Frequently Asked Questions
Can the Sharp ZU1 replace my main heater?
Depending on the insulation and the power chosen, it often covers most of the needs; additional power may remain relevant during prolonged periods of extreme cold.
How long will the work take?
In standard residential with a short run and planned base, we generally complete the installation in one day, including testing.
And the noise for the neighbors?
The large diameter fan and inverter limit noise; the silent blocks and the wall gap reduce transmission.
Conclusion
This Sharp ZU1 wall-mounted heat pump installation in Saint-Laurent illustrates our approach: rigorous design, short cooling path , perfectly level raised base , and durable finishes. The result: four-season comfort , lower energy bills, and a clean facade ready to face Montreal winters.
Strategic keywords : heat pump , wall-mounted heat pump , Sharp ZU1 , HVAC installation , HVAC maintenance , Montreal , Laval , Longueuil , North Shore , South Shore , Saint-Laurent .