Consistent comfort and careful finishing in a renovated suburban home
At AirGreen , we have just completed the installation of a Sharp ZU1 wall-mounted heat pump in a family property in Sainte-Dorothée (Laval) . The project is part of a recently modernized ground floor: light partitions, recessed lighting, integrated furniture and circulation between the vestibule, kitchen and dining room. The client's objective was twofold: to stabilize the temperature of the open living area and to reduce electricity consumption during the heating and cooling seasons. The Sharp ZU1 (R-32) perfectly meets these specifications with its fine modulation and its silence at low speed.
Context of intervention and constraints of the place
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Space : central wall forming a circulation core, clear and ideal for transverse diffusion towards the entrance and the kitchen.
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Height : high installation, under the ceiling, leaving comfortable clearance for suction.
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Integration : wall thermostat and sockets nearby; technical cutouts provided for power supply and connection passage.
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Requirement : avoid unnecessary drilling, preserve aesthetics and allow rapid maintenance.
Why the Sharp ZU1 (R-32) series is a must-have in Greater Montreal
The Sharp ZU1 series is one of the new generation wall-mounted references to R-32 refrigerant , appreciated for its air conditioning performance and its resistance to Quebec cold.
Concrete highlights:
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Continuously modulated inverter compressor : the machine precisely adapts its power to actual needs, limiting cycles and lowering operating costs .
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Cold performance adapted to the greater Montreal area, with reliable heating during episodes of −20°C.
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Air quality : multi-layer filtration and regular airflow that prevents the sensation of drafts.
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Low noise level : the indoor unit remains discreet in living rooms, even in the evening.
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R-32 : better heat transfer and reduced environmental footprint compared to older fluids.
Typical capacities: 12,000 to 24,000 BTU for the ZU1 series, allowing the power to be precisely adapted to the thermal load of open living areas typical of homes in Laval and the North Shore .
Design and refrigeration path : short, clean and sustainable
Single drilling and gravity evacuation
The positioning of the interior head on an exterior wall allowed for direct rear drilling . The insulated copper connections open to the exterior with white capping to match the decor, then descend in a straight line towards the condenser. Condensate is drained by gravity , a preferred solution for its silence and long-term reliability.
Condenser and supports
The condenser (outside) is placed on galvanized wall brackets with anti-vibration pads . This approach:
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keep the device away from snow and dirt,
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promotes battery ventilation ,
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reduces vibration transmission to the structure — an advantage on lightweight facades.
Power supply and protections
We have provided a dedicated power supply with a suitable circuit breaker, an external service switch , and clearly marked cable routing. The refrigeration junctions are soldered and the insulation is UV -sheathed to prevent premature aging.
Air diffusion and settings: comfort felt throughout the living area
The unit, centered on the distribution wall , blows along the axis of the corridor towards the entrance and the kitchen. We adjust the orientation of the fins to:
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send air over the passage areas,
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avoid direct impact on seated occupants,
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promote a homogeneous mixture throughout the open area.
In cooling , the automatic speed maintains a low noise level; in heating , a slightly downward blowing angle limits stratification near the ceiling.
Sizing and savings: what makes the difference
Proper sizing (BTUs) in an open area avoids two pitfalls:
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Undersizing : machine at high speed, increased consumption and wear.
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Oversizing : short cycles, less efficient humidity management.
Our team calculates the thermal load based on orientation, insulation, glazing, and actual use. Combined with the modulation of the Sharp ZU1 , this choice results in:
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remarkable temperature stability ,
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smoothed consumption peaks ,
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and increased component longevity .
Finishing and maintenance: details that count
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Capping : white, aligned and without unnecessary bends ; stainless steel screws and weatherproof seals.
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Drainage : regular slope, drainage test carried out before delivery.
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Maintenance access : clearance maintained around the head for cleaning the filters and exchanger.
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Labeling : Clear identification of archived circuits and AHRI numbers for traceability and financial aid applications.
Grants and Eligibility
High-efficiency R-32 wall-mounted heat pumps are often eligible for provincial or federal assistance programs , subject to performance thresholds. Our team supports the Sainte-Dorothée client in:
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verification of technical criteria (AHRI combination number, SEER/HSPF levels),
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preparation of documents ,
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and the submission for Montreal, Laval , Longueuil , North Shore and South Shore .
Result for the customer: immediate comfort and peace of mind
Following commissioning and testing:
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the open area benefits from a uniform temperature ,
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the noise level remains very discreet on a daily basis,
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the aesthetics of the place are preserved thanks to a short route and clean finishes,
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the energy bill is controlled thanks to modulation and good sizing.
AirGreen Tips for Similar Rooms in Laval and Surrounding Areas
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Choose an exterior wall to minimize the length of connections and promote gravity drainage .
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Respect the clearances around the head (suction/blowing): avoid cupboards, wall returns and cornices that are too close.
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Clean filters every 4 to 8 weeks depending on dust and the presence of animals.
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Clear the condenser of snow and ice in winter to maintain heat pump performance.
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Plan annual maintenance : pressure check, cleaning of exchangers, checking of condensate tray and fixings.
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Program low speeds in the evening for an even quieter atmosphere and optimal performance.
Why entrust your project to AirGreen?
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Local expertise : hundreds of successful wall installations in Laval , Montreal and on both shores .
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Methodology : thermal study, precise positioning , aligned capping, compliant electrical protections.
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Complete support : choice of capacity, management of subsidies , usage advice, then HVAC maintenance .
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Recent range : we favor R-32 / R-454B models (Sharp, Fujitsu, Midea, Gree, etc.) for lasting compliance with current standards.
In summary
This Sharp ZU1 wall-mounted heat pump installation in Sainte-Dorothée (Laval) illustrates our approach: minimal path , gravity drainage , anti-vibration mounts, clean finishes and air settings designed for an open living space. The result is stable comfort all year round and energy efficiency aligned with the expectations of Greater Montreal homeowners.