A neat installation in a Montreal apartment with a century-old cachet
At AirGreen , we work weekly in charming old-world buildings in the Plateau-Mont-Royal region . Ornate moldings, oversized doorways, narrow passageways: these interiors require precise HVAC installation to preserve aesthetics while delivering impeccable performance. Here, we integrated a Fujitsu wall-mounted heat pump above a large decorative frame, between the living room and the kitchen, to optimize air distribution throughout the entire floor without visually encroaching on the room.
Why this setup works so well in Plateau apartments
In typical Montreal through- apartments, air circulates naturally along a living room ↔ kitchen axis. Positioning the interior head above a central passage allows:
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to use the existing air corridor to push coolness in summer and gentle heating in winter to adjacent rooms;
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to eliminate dead zones often present behind load-bearing walls;
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to reduce consumption through better controlled stratification.
We chose a high installation height to free up wall space, while respecting the manufacturer's technical clearances : sufficient space at the top and sides, free shutter over its entire travel, and air intake not obstructed by the molding.
The equipment: the reliability of a Fujitsu wall-mounted heat pump
The Fujitsu brand is a trusted name in residential wall-mounted heat pumps in Quebec. For an average-sized home on the Plateau, the standard capacities (9,000 to 18,000 BTU) perfectly cover supplemental heating needs in winter and cooling needs in summer. The strengths sought by our urban customers:
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Inverter modulation to maintain a stable temperature without jolts;
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Low noise level from indoor head and outdoor condenser;
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Easily accessible filters for quick HVAC maintenance ;
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Simple remote control + Wi-Fi options depending on the range to refine schedules during periods of absence.
During the technical visit, we size the capacity by taking into account the orientation, the actual insulation, air leaks (old doors/windows), the internal gains of the kitchen and the number of occupants. This approach avoids oversizing (short cycles, noise, additional cost) as well as undersizing (insufficient comfort during heat peaks).
Installation details: precision and cleanliness in a protected architectural setting
Mounting bracket and templates. We fixed the wall plate to a solid structural area behind the cladding (brick/plaster/lath) after locating it with a detector. The anchors are sized to limit vibration transmission.
Drilling and crossing. A single 65 mm drilling was made with a controlled slope for condensate drainage. A vacuum corer was used to avoid leaving any dust, which is essential in a busy kitchen.
Refrigerant connections. The insulated copper tubes (liquid and gas lines) are bent without forced bends to maintain efficiency. We deliberately reduce the total length between the head and the outdoor condenser to reduce pressure losses and simplify subsequent maintenance.
Interior aesthetics. A discreet white capping follows the molding and visually disappears above the reveal. The cuts are square, the joints are glued and screwed; no visible screws are left unaligned.
Condensate management. The gravity slope was validated with a flow test. The use of a condensate pump was not necessary; it is quieter and more reliable in the long term.
Power supply. A dedicated circuit protects the equipment; the low-voltage cable routing is separate from the refrigerant connections to avoid interference and facilitate future diagnostics.
Coordination with the exterior: short course and four-season protection
Although the photo highlights the interior head, our team installed the raised condenser on the exterior side on supports suitable for the urban environment (balcony/flat roof/backyard). Best practices applied:
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Compliant clearances around the unit for optimal air exchange;
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Silent blocks to limit the transmission of vibration to structural elements;
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Installation of a snow cutter/deflector when the installation is exposed;
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UV sheaths and ribbons adapted to the freeze-thaw cycles of Greater Montreal .
We plan these details from the submission stage: they determine the lifespan and seasonal performance of the system.
Challenges specific to old buildings… and our solutions
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Moldings and false levels. Historic walls aren't always perfectly straight. We adjust the base plate and wedge the head to ensure condensation drains without retention, even with millimeter tolerances.
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Extraneous noise. The doorways sometimes resonate. We use damping pads and follow the recommended tightening torque on the head mounting screws; no creaking when starting.
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Invisible route. The aesthetic constraints of the Plateau dictate total discretion : the shortest possible route, coordinated capping, no visible cuts, passages hidden behind the cornices.
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Restricted construction site access. Narrow stairs, limited parking... We schedule deliveries at quiet times , protect common areas and remove waste the same day.
Measured results: immediate comfort and controlled consumption
When commissioning, we proceed to:
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Vacuum extraction according to the rules of the art and leak test;
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Weighing/refrigeration according to the length of lines;
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Checking for overheating/subcooling ;
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Validation of blowing speeds and vertical/horizontal sweeping to cover living room and kitchen;
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Occupant education: temperature instructions, auto mode vs heating/air conditioning, filter cleaning, door management to promote cross ventilation .
From the very first hours, the customer notices a uniform lowering of the temperature in air conditioning mode, without direct air currents in the dining area. In winter, the tempered airflow reduces the need for electric baseboard heaters in adjacent rooms, with significant energy savings on the bill.
What this achievement teaches if you are planning a similar installation
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Choose the location before the model. Good positioning is worth more than 1,000 extra BTUs. On a board of stacked pieces, a head in the center is a winner.
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Check condensate drainage. Gravity drain whenever possible; a pump is only a last resort.
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Limit line length. A short route improves efficiency and reliability.
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Anticipate maintenance. Accessible filter, clearance around the condenser, and winter protection simplify life for 10–15 years.
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Think acoustically. A thin wall can transmit; the quality of the anchors and silent blocks makes the difference in the Plateau-Mont-Royal plexes.
Grants and Eligibility: What You Need to Know
Several Fujitsu wall-mounted heat pumps meet the efficiency criteria required by the programs in effect in Quebec. Eligibility depends on the SCOP/SEER , the heating operating range (extreme cold), and the power chosen. When taking measurements, we check the technical data sheets and assist the customer in preparing the parts (detailed invoice, model number, serial number, installation photos). The goal: to maximize aid while maintaining a compliant and durable installation .
AirGreen: local expertise, comprehensive service
Working in Montreal, Laval, Longueuil, the North Shore and the South Shore requires knowledge of building types: plexes with load-bearing brick walls, condos with flat roofs, townhouses with narrow driveways, etc. Our certified team handles:
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thermal study and capacity recommendation (9k, 12k, 15k, 18k BTU, etc.);
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careful installation (clean coring, aligned capping, discreet cabling);
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commissioning and complete documentation for warranties;
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maintenance monitoring (cleaning filters, inspecting connections, controlling condensates) to maintain performance and air quality.
Our promise is simple: an HVAC installation that respects the soul of your apartment while offering you modern comfort at the best operating cost.
Conclusion
This Fujitsu wall-mounted heat pump installation in Plateau-Mont-Royal illustrates our way of working: detailed analysis of the structure, precision of execution and impeccable finishes. The result is a reliable, quiet and energy-efficient system that fits naturally into the decor of a Montreal apartment with moldings. If you are considering a heat pump in an older plex or an urban condo, our team will support you from the study to the commissioning, everywhere in Montreal , Laval , Longueuil , on the North Shore and the South Shore .