A neat and invisible installation inside, designed for 4-season comfort in Montreal
At AirGreen , we install HVAC systems that seamlessly integrate into the decor while delivering measurable performance. This project in an apartment in Côte-des-Neiges–Notre-Dame-de-Grâce illustrates our approach: a Sharp wall-mounted heat pump ( ZU1 series) installed high on the wall, flush with a decorative molding, with a fully concealed connection passage. The result: a sleek living room, stable comfort in summer and winter, and efficiency that reduces the load on existing electric baseboards .
Context and objectives of the project
The owner wanted a reversible wall-mounted air conditioner that would heat economically during Montreal 's cold weather and cool quickly during heat waves. His priorities:
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preserve the aesthetics of the living room;
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limit visible drilling;
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achieve quiet and precise temperature operation;
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benefit from an installation eligible for grant programs when the configuration and performance allow it.
On site, the main room features standard height, crown molding, furniture close to the wall, and a potential passage to the outdoors at a short distance. The final location chosen—centered at the top of the wall—guarantees uniform diffusion, unobstructed air return, and easy access for HVAC maintenance .
What sets Sharp's solution apart for an NDG condo
A compact and aesthetic indoor unit
The Sharp wall head (with the characteristic central icon) fits discreetly into the light decor. Its position just below the ceiling molding allows:
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limited stratification of hot air in heating mode;
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efficient air sweeping in air conditioning mode;
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side clearances in accordance with good HVAC installation practices.
The absence of visible trunking inside indicates a passage of connections behind the partition , with an angle calibrated to respect the radii of curvature of the refrigeration tubes. This choice increases visual cleanliness while improving the acoustic insulation of the pipes.
4-season performance and comfort
The ZU1 series heat pump is renowned for its precise inverter control and quiet operation. The tangible benefits for everyday use:
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rapid temperature rise without jolts;
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stable maintenance of the setpoint, even during weather variations;
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significant reduction in consumption compared to baseboards.
In Greater Montreal, a properly sized unit from this family often allows for high seasonal efficiencies and can contribute to the installation's eligibility for financial assistance when the efficiency and low-temperature performance criteria are met.
Technical details and installation finishes
Route of connections and drilling
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Unique drilling on the back of the unit, neat and with controlled slope for condensate drainage.
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Refrigeration connections (insulated copper) and communication cable routed inside the partition then to the outside, avoiding any visible trunking in the room.
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Gravity-fed condensate is preferred when the natural slope allows it; failing that, prepare a discreet location for a silent micro-pump. Here, the wall configuration and installation height make gravity drainage ideal.
Support and protections on the outside (outside the photo)
Even if the photo is of the interior, our standard provides:
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galvanized wall brackets with silent blocks to limit vibrations;
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minimum clearance in accordance with manufacturer requirements;
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white UV trunking on the outside to protect copper, drain and cables;
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service loops and snow guards when orientation and environment require it.
Power supply
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Dedicated circuit according to the intensity of the device, calibrated circuit breaker and safety circuit breaker (disconnect) near the outdoor unit.
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Grounding verified and terminals tightened to the recommended torque for long-term reliability.
Air quality and acoustic comfort
The Sharp head incorporates low-pressure-loss multi-stage filtration and a precise motorized shutter. In practice:
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directed blowing avoids direct air currents on the sofa;
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the low noise level allows for use in the evening without discomfort;
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Filter maintenance, accessible from the front, can be done in a few minutes, which prolongs the performance and cleanliness of the exchanger.
Sizing and calibration
Our team validates the room's thermal load and the housing's orientation. Here, the living room volume and solar gain justify the selection of a typical capacity of 9,000 to 12,000 BTU/h for the main head, depending on the condo's actual heat losses and the presence of adjacent spaces. In heating mode, the unit is configured to limit cycles and maintain the setpoint without overheating, which improves comfort and durability.
Deadlines and progress of work
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Protection of the place (canvases, floor coverings);
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tracing, drilling, installation of the support and the plate;
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tube shaping, flaring, deep vacuum drawing with digital vacuum gauge;
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leak tests, valve opening, powering up;
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commissioning with verification of superheating/subcooling and blowing temperatures;
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explanations to the customer: cleaning of filters, instructions for proper use, reminder of HVAC maintenance intervals.
The presence of a professional stepladder is visible in the photo: the head being placed high, the precision of alignment and compliance with the tightening torques of the connections require a stable and secure workstation.
Result: comfort, discretion and savings
The system provides consistent cooling from the very first minutes and remarkably gentle heating in the mid-season. Baseboards become a useful addition. The interior aesthetics are preserved thanks to the invisible connections, and maintenance is simple: regular dusting of the filters and an annual inspection are sufficient to maintain performance.
AirGreen Tips to Maximize the Value of Your Facility
Good usage practices
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Maintain a stable setpoint rather than increasing temperature variations.
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Clean the filters every 4 to 8 weeks depending on the ambient dust.
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Leave the shutter in automatic sweep to homogenize the temperature.
Maintenance and longevity
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Annual HVAC maintenance by our technicians (inspection, delicate cleaning of the evaporator, drain check, parameter control) prevents a drop in performance.
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Outside: Clear the unit of leaves and snow, ensure free space for heat exchange.
Grants and Eligibility
Depending on the configuration chosen (capacity, SEER2/HSPF2 , cold weather performance), the wall-mounted heat pump may be eligible for assistance programs. Our team verifies these criteria during the submission process and assists in preparing the documents. Customers in Montreal, Laval, Longueuil, the North Shore, and the South Shore benefit from comprehensive support to optimize the net cost of the project.
Why AirGreen
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Impartial advice on the right brand and capacity for the accommodation;
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Exemplary finishes (invisible passages, aligned trunking, careful sealing);
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Compliance with RBQ standards and manufacturing guides;
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Responsive after-sales service, parts and warranty handled straightforwardly.
Common Mistakes Avoided
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Choosing an oversized capacity: more cycles, more noise, less comfort.
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Drill too low: insufficient condensate slope and risk of dripping.
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Forget about outdoor clearances: performance penalized in winter.
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Neglecting deep vacuum: residual humidity harmful to the compressor.
What about multi-room accommodation?
When the need extends to multiple rooms, AirGreen offers MultiZone systems where each head has its own control. The thermal analysis determines the correct BTU mix and the best routing for the connections to maintain a clean interior, as in this NDG installation.
Are you planning an HVAC installation in Greater Montreal? Our team operates throughout Montreal, Laval, Longueuil, the North Shore, and the South Shore , with the same high standards of finish and performance as on this Sharp project. Request your estimate: we size, install, and provide technical support for lasting comfort.