This project in brief: precision, clean finishes and performance on target
In a Villeray–Saint-Michel–Parc-Extension home, we installed a Midea28 wall-mounted heat pump (R-454B refrigerant, extreme cold profile down to -30°C) to provide daily heating and cooling . The indoor head is positioned high on the wall, close to the ceiling, with a readable setpoint display ; a discreet technical molding route runs along the corner of the wall and ceiling to route the supply while maintaining a clean aesthetic. The condensate drain operates by gravity with a continuous slope, which eliminates the need for a pump and reduces maintenance. The result: uniform distribution , silence and energy savings adapted to the winters of Greater Montreal .
Space and its constraints: what we took into account
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Installation height : 18–25 cm below the ceiling to optimize the return of hot air in heating mode and increase the blowing range.
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Proximity to a door : the head is clear of the door drop to avoid turbulence and protect the shutter mechanism.
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Clean path : fine capping , neat 90° angles, color coordinated with the wall for a minimalist look.
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Rear wall pass-through : short refrigeration path to the outdoor condenser; the insulation is continuous to prevent summer condensation.
AirGreen Method: an HVAC installation designed to last
Accurate sizing (BTU) and series selection
At AirGreen, we size the BTU capacity according to the surface area, the envelope, the orientation and the actual occupancy rate. The Midea28 is available in 9,000, 12,000, 18,000, 24,000 and 33,000 BTU; we retain the power that avoids short cycles in summer and ensures efficient capacity maintenance in winter, guaranteeing a high HSPF and a competitive SEER . The inverter compressor finely adjusts the power and limits overconsumption during restarts.
Drilling, sealing and drainage
The drilling is carried out with a slight counter-slope towards the outside to preserve gravity drainage . We install a waterproof wall pass-through , mastics and caulking to eliminate air infiltration and thermal bridges . The condensate pipe follows a regular slope and opens onto a discharge point designed to avoid marking the facade.
Refrigeration connections and vibrations
Copper connections are flared to the correct torque and tightened to the manufacturer's tightening torque . We reduce the number of elbows to limit pressure losses. Anti-vibration pads under the outdoor condenser and careful alignment of the indoor head prevent hum and improve compressor longevity .
Vacuum packaging and quality control
We carry out a deep vacuum (controlled vacuum), open the valves in stages, then check the blowing temperatures and the delta T. A commissioning report is drawn up: electrical readings, intensities, tested instructions, device number, photos of finishes.
Why the Midea28 in Greater Montreal?
Cold climate performance
The Midea28 heat pump , thanks to its R-454B refrigerant and its control electronics, maintains a useful heating capacity when the mercury drops. For Montreal , Laval , Longueuil , the North Shore and the South Shore , this is a concrete advantage: less use of baseboards or additional radiators and stable comfort even during periods of prolonged frost.
Energy efficiency and bill
The Midea28's high seasonal efficiency reduces annual electricity consumption . Combined with good operating practices (reasonable settings, eco mode at night), the system limits costs without sacrificing comfort.
Silence and inner integration
The interior head is very discreet : Low/Quiet speed for nighttime use, precise vertical sweep so as not to blow on the bed or workstation. The front instruction display remains simple and readable; the technical molding painted in the color of the wall blends in.
Integration details: what makes all the difference in a bedroom
Placement relative to obstacles
We keep the machine away from narrow corners and tall objects (cabinets, shelves). The chosen angle allows the airflow to sweep around the room without immediately bouncing off an obstacle, thus avoiding cold spots in winter and the effect of drafts in summer.
Dedicated power supply
The Midea28 requires a dedicated circuit breaker ; we provide a protected path to the panel, in accordance with the Code requirements. In older apartments, we optimize the cable run in molding to preserve the walls and limit invasive interventions.
Exterior finishes
Outside, the condenser is installed on brackets or a slab, depending on the facade. We leave a rear clearance for heat exchange and install a deflector if the courtyard's architecture encourages snow accumulation. The service hoods remain accessible for maintenance.
Results obtained and benefits for the occupant
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Immediate comfort : rapid temperature rise, maintenance of the set point without fluctuations.
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Controlled acoustics : no background noise at night; the unit runs at minimum when the load drops.
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Air quality : cleanable filters, reduction of humidity in summer thanks to dehumidification mode.
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Aesthetics : clean lines, flush capping and aligned angles; no lifting pump = zero additional noise.
HVAC maintenance: reflexes to adopt
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Cleaning the filters : every 4 to 8 weeks depending on use; rinse with lukewarm water, dry completely before replacing.
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Annual maintenance : exchanger inspection, electrical tightening, drain check and seasonal performance verification.
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Settings : Aim for 21°C in winter and 24–25°C in summer; activate dehumidification during humid periods for milder comfort.
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Winterization : Ensure sufficient condenser airflow and clear snow around the grilles to maintain airflow.
Grants and procedures
The Midea28 heat pump belongs to the new high-performance generations and can meet the current criteria of Quebec programs when the capacity and certified performance are there. Our team takes care of the eligibility verification , the collection of documents (serial numbers, proof of commissioning, photos) and the support until the submission of the file for Montreal , Laval , Longueuil , the North Shore and the South Shore .
What we bring extra to each project
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Transparent sizing and clear explanations of options (9k, 12k, 18k, 24k, 33k BTU).
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Refrigeration path optimized for reliability and visual cleanliness.
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Complete tests and mini user training: modes, instructions, filter maintenance.
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Responsive after-sales service and scheduled HVAC maintenance to maintain efficiency.
And what about the other rooms?
If you want to extend the comfort to several bedrooms or a separate living room, we offer compatible MultiZone solutions : one outdoor unit for several indoor heads. We compare the overall cost , the visual impact of the cappings and the drilling logistics to achieve a harmonious result across your home.