A perfectly integrated interior head above a central passage for seamless comfort and maximum efficiency — signed AirGreen
In a typically Montreal-style apartment in the Plateau-Mont- Royal , we installed a Fujitsu Halcyon wall-mounted heat pump . The indoor unit, mounted high in the skylight above a door , serves a living space in a row (kitchen, living room, hallway). This placement allows for optimal air diffusion while preserving the aesthetics of the period moldings and woodwork—a common issue in older buildings in the heart of Montreal .
Why this setup works so well in a Plateau plex
Narrow spaces with successive passages require long-range diffusion and smooth air reintroduction . The Fujitsu head, installed at the top:
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sweeps the corridor and hangs the living room , ensuring a regular temperature even in the adjacent rooms;
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avoids direct airflow on occupants thanks to multi-position motorized shutters;
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reduces losses linked to obstacles (doors, cornices), because the air jet follows the natural circulation corridor.
The result: fewer temperature differences between the kitchen, dining room and living room, and an immediate feeling of comfort in both air conditioning and supplementary heating.
The Fujitsu Halcyon (R-32) platform: efficiency, silence and longevity
Fujitsu 's Halcyon range is renowned for its inverter modulation and high seasonal efficiency . On this installation, we were looking for:
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low noise level for discreet use in the living area;
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heating stability in the off-season (autumn/spring);
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an R-32 refrigerant with a lower GWP than R-410A;
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proven reliability in Montreal residential service.
The selected capacity range (usually 9,000 to 12,000 BTU for this type of volume) comfortably covers the needs of the apartment while limiting on/off cycles thanks to the continuous variation of the compressor.
Installation details: mechanical precision and respect for the structure
Implementation and clearances
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Installation at the highest point of the load-bearing wall, under the ceiling , with sufficient clearance to suck in air without recirculation.
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Laser-calibrated to ensure horizontality and avoid airflow noise.
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Fixing on structural dowels adapted to the support, preserving the moldings and the lintel.
Refrigeration and electrical paths
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Short and clean route to the outside to limit pressure losses and facilitate maintenance.
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Discreet cladding of connections (insulated copper + communication wiring) for a neat finish in an environment with high heritage value.
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Dedicated power supply with external service switch, in accordance with Code and manufacturer's recommendations.
Condensate management
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Priority to the gravity drain with constant slope and watertight crossing ; if the architectural configuration does not allow it, we provide a compact and silent condensate pump with easy access for maintenance.
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Polyurethane sealing of holes to maintain airtightness and smoke control in an open kitchen.
AirGreen commissioning: our quality protocol
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Flaring/crimping to the template and controlled tightening torques .
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Nitrogen test and leak detection (foam solution + electronics).
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Deep vacuum (≤ 500 microns) with stabilization , guaranteeing compressor longevity.
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Opening of the valves , control of the intensities and reading of the blown temperatures (delta T).
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Setting of Auto/Heat/Cool modes, orientation of shutters , dehumidification instructions for summer peaks.
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Customer training : filter cleaning, ideal periods of use, energy saving tips.
What our customers gain every day
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Uniform comfort throughout the kitchen-living room-hallway axis;
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Significant reduction in electricity consumption compared to baseboards in the off-season;
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Silent operation : conversation and meals preserved;
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Improved air quality thanks to washable filters and humidity control;
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Aesthetics respected , without visible cables or superfluous drilling.
Specific features of a construction site in an old building: our solutions
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Uneven walls / moldings : we use leveling shims for flatness and avoid weakening decorative elements.
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Fragile paint/coating : minimal marking and site protection (low-adhesion tape, covers).
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Kitchen ventilation nearby: separation of functions to avoid any recycling of hot/cold air and respect clearances.
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Structural noise : anti-vibration pads and verification of the rear plate fixing torque.
Performance, subsidies and support
High-efficiency wall-mounted heat pumps like this Fujitsu Halcyon (R-32) boast excellent SEER/HSPF ratings and, depending on capacity and configuration, can provide access to financial assistance when a provincial or municipal program is in effect. At AirGreen, we guide our clients in Montreal, Laval, Longueuil, the North Shore, and the South Shore to verify eligibility and prepare applications when appropriate.
HVAC maintenance: best practices for longevity
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Filters : rinse every 4 to 8 weeks during the summer.
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Clearances around the interior head: do not obstruct the air intake (shelves, plants).
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Annual AirGreen inspection : pressures, temperatures, connections, condensates, condition of insulation.
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Winter : allow the appliance to complete its cycles (possible defrosting on the outside), do not cut off the power suddenly.
Regular HVAC maintenance maintains seasonal performance and secures the manufacturer's warranty .
Common mistakes avoided here
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Head too low above a door causing air recirculation: we have favored the maximum height compatible with the soffit.
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Drain without slope : our route maintains a continuous slope and an accessible service point .
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Unsealed penetrations : all passages are sealed to protect the envelope and energy efficiency.
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Visible wiring : covers and short runs ensure clean integration into the decor.
AirGreen: a local team, impeccable finishes
Our certified installers work weekly on plexes and condos in downtown Montreal. Our promise: accurate sizing , methodical HVAC installation , discreet finishing , and after-sales service . We serve all of Greater Montreal — Montreal, Laval, Longueuil, North Shore, South Shore —with concrete advice and realistic deadlines.