Quiet comfort and efficiency in urban environments
In a bright apartment in Verdun , we are installing a Sharp ZHU1 (R-32) wall-mounted heat pump to provide reliable heating in winter and precise air conditioning in summer. The goal: to gain comfort without sacrificing interior aesthetics or disturbing the neighborhood. The indoor head, placed high under the ceiling , blows evenly and discreetly onto the living area; the outdoor unit, installed on a raised support, works in perfect synergy to modulate the power continuously thanks to the inverter compressor .
The layout of the accommodation requires choices of short routes and careful finishing . We have chosen an exit to the right of the interior head, with a discreet chute at the corner of the wall ensuring the protection of the connections and the gravity drain . This layout avoids tight bends, preserves efficiency and simplifies maintenance.
Our HVAC installation process, step by step
Site study and sizing
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Analysis of volumes and flow rates required to heat/cool the main living area; validation of BTU sizing to avoid under- or oversizing.
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Choose a high position on an interior wall to maximize stratification in heating mode and avoid direct blowing onto rest areas.
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Verification of co-ownership constraints and clearances required for the outdoor unit.
Installation of the plate and anchors
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Leveling the fixing plate and anchoring it in load-bearing points.
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Respect side clearances for access to the filter and the service hatch.
Drilling and refrigerant connections
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Through-hole of the appropriate diameter, protective sleeve and slight outward slope for condensate drainage.
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Routing of deoxidized copper tubes , shaped with controlled bend radii ; continuous closed-cell insulation against condensation and UV.
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Communication and power cables are combined in the trunking for a clean finish.
Condensate management
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Gravity drain connected to the right of the inner head; constant slope ensured to the outlet point.
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Flow test and leak check inside the chute to prevent seepage.
Outdoor installation (method reminder)
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Sharp condenser on raised aluminum support , with anti-vibration pads .
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Proper clearances around the grille to prevent air recycling and facilitate defrosting in winter.
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Connection to a dedicated circuit from the electrical panel; checking the circuit breaker rating and grounding.
Vacuuming, charging and testing
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Deep vacuum until stabilization, then validation of vacuum resistance.
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Power up, heating and air conditioning tests; checking temperature differences and air flow .
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Function settings: eco mode , vertical scanning, automatic restart , time slots.
Why the Sharp ZHU1 is suitable for Verdun
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R-32 : better volumetric efficiency and lower GWP than the old R-410A.
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Cold weather performance tailored to Greater Montreal ; stable comfort, even in freezing conditions.
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Low noise level : ideal for buildings with shared partitions.
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Compact size and understated design that easily blends into interior decor.
What we optimize on each construction site
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Shortest possible path between the head and the condenser to limit pressure losses and improve responsiveness in inverter mode.
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Anti-vibration and precise horizontal adjustment to eliminate structure-borne noise.
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Finish : flush channels, screw heads painted if necessary, watertight joints around the edge of the hole.
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Electrical safety : external circuit breaker, torque tightening, clear circuit marking.
Results for the client
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Rapid heating upon waking and gentle, continuous maintenance for the rest of the day.
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Uniform air conditioning without the feeling of cold air on the occupants thanks to the high positioning and sweeping .
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Lower consumption compared to conventional electric convectors thanks to modulation .
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Simplified maintenance : accessible filters, removable chutes, direct access to the service panel.
Operating advice (Montreal, Laval, Longueuil, North Shore, South Shore)
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Maintain stable setpoints (20–22°C in heating) to exploit the seasonal efficiency of the inverter.
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Clean filters every 4 to 8 weeks depending on usage; dust fins as needed.
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In winter, clear snow around the raised condenser to facilitate defrosting.
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Program the dehumidification mode during humid summer episodes to improve comfort at moderate temperatures.
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Plan an annual visit : electrical inspection, drain check, exchanger cleaning, verification of tightening and parameters.
Common mistakes… and our solutions
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Air boosting towards a narrow corridor: we adjust the orientation of the shutters to blow towards the open volumes.
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Tight elbows and winding paths: the straight chute in the ceiling and the exit on the right avoid these losses.
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Badly inclined drain : controlled slope and flow test guarantee no water return.
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Vibrations : Anti-vibration rails and fan balancing reduce transmission to the walls.
Grants and Compliance
High-efficiency wall-mounted heat pumps like the Sharp ZHU1 (R-32) are often eligible for financial assistance based on current criteria (cold weather performance, certification, installation by a properly licensed contractor). At AirGreen, we:
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Let's check eligibility for Montreal , Laval , Longueuil , North Shore and South Shore ;
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Let’s prepare the required evidence (photos, serial numbers, installation certificate);
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Let's optimize the return on investment by combining subsidies and best practices.
Project data sheet (summary)
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Type : single-zone wall-mounted heat pump .
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Brand / Range : Sharp ZHU1 , refrigerant R-32 .
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Interior installation : high head under ceiling , exit on the right , gravity drain , discreet chutes.
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Route : direct wall crossing , short and isolated connections.
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Context : apartment in Verdun , priority given to silence and visual sobriety .
Are you considering an HVAC installation in a condo in Montreal, a house in Laval , or a plex in Longueuil , on the North Shore or the South Shore ? We size, install, and maintain the heat pump that fits your lifestyle, with clean and sustainable integration.