An elevated location for immediate comfort in an open Montreal area
At AirGreen , we adapt each HVAC installation to the architecture of the Plateau's plexes and condos. Here, the LG wall-mounted heat pump ( Dual Inverter range) is positioned high up , above the vestibule and at the entrance to an open area that includes the living room, kitchen and dining area. This configuration allows for long-range air diffusion to the entire floor while freeing up useful walls for furnishings.
The room has a sloping ceiling with drop, track lighting and a large side window: all elements that influence air circulation. By placing the unit at the most unobstructed point , we obtain a uniform sweep without hot recirculation under the ceiling in winter or cold zones near the windows in summer. The aesthetic remains sober: the interior head integrates into the white frame of the wall, without visible hood or visible channel in the room.
What the LG heat pump brings to a Plateau plex
LG's Dual Inverter technology allows the compressor to finely modulate its speed. In concrete terms, this means:
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Stable temperature without jolts, pleasant for both sleeping and teleworking.
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Energy savings thanks to modulation that avoids on/off cycles.
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Low noise level from indoor and outdoor units, an advantage in adjoining buildings.
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Useful everyday comfort functions : automatic restart, precise shutter control, frost protection, daily programming.
Depending on the surface area and insulation, we generally recommend a power output between 9,000 and 15,000 BTUs for a typical open-plan apartment building. Here, the challenge was to cover a high-ceilinged volume while still allowing space for the lighting strip and the roof overhang.
Our sizing methodology
Before any installation, we take measurements and perform a simplified thermal assessment : surface area, free height, orientation of the windows, air infiltration, use of the room. Based on this, we choose the appropriate BTU power and blowing curve . On LG units, the angle of the louvers and the fan speed provide sufficient adjustment margin to project air towards the kitchen and living room areas without creating a draft near the vestibule.
Technical details and installation steps
1) Positioning of the inner head
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Installation height above the drop : the air is propelled under the ridge then descends naturally, avoiding stratification.
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Side clearances respected for maintenance (opening the hood, cleaning the filters).
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Alignment with the lighting rail to limit shadows and avoid any visual disturbance.
2) Drilling and refrigeration route
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Precision coring with controlled slope for gravity drainage of condensates in air conditioning mode.
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Short, straight route behind the partition to limit pressure losses, with continuous insulation on the copper connections.
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Waterproofing of the through-hole on the exterior side and moisture barrier at the masonry level.
3) Condensate management
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Gravity drain to the outside, protected against frost and away from traffic. This approach eliminates the need for a condensate pump—less noise, less maintenance.
4) Power supply
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Dedicated circuit, circuit breaker calibrated according to the nominal current of the unit; external disconnection near the condenser for safe interventions.
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Grounding and mechanical routing in accordance with the Canadian Electrical Code and manufacturer's requirements.
5) Commissioning and checks
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Brazing under nitrogen , leak test, deep vacuum drawing to the required threshold.
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Checks on supply/return temperature , intensity, pressure and communication between electronic cards.
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Initial setting of the shutters for a jet of air directed towards the living area, then demonstration of the functions to the occupant.
Architectural integration: making height an advantage
Sloped ceilings can trap warm air; by placing the head at the top and directing the long horizontal flow, we create a natural convection loop . In winter, the heated air gently descends towards the vestibule and kitchen area; in summer, low to medium speed is enough to break up the pockets of warm air under the ceiling without feeling a draft. The presence of a guardrail on the kitchen side also guides the air circulation towards occupied areas.
Results observed after installation
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Temperature uniformity throughout the open area, even during rapid weather changes.
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Reduced ambient noise compared to an old portable air conditioner; conversation under the spotlight rail remains natural.
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Controlled consumption : continuous modulation and short refrigeration path optimize seasonal efficiency.
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Simplified HVAC maintenance : easily accessible filters; the outdoor unit, installed in the optimal location on the courtyard side, offers clear access for washing the exchanger.
Maintenance recommended by AirGreen
To maintain the performance of your wall-mounted heat pump :
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Clean filters every 4–8 weeks during periods of heavy use.
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Clear the outdoor unit of leaves, dust and snow; check the clearance in front of the fan.
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Check the slope of the drain in the spring and make sure that the outlet is not blocked.
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Schedule an annual inspection : electrical readings, temperatures, condition of insulation and washing of coils if necessary.
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Adjust time programming and seasonal settings to limit power demands.
Grants and Eligibility
Several programs in Quebec and at the federal level support the installation of high-efficiency heat pumps . Eligibility depends on the seasonal performance (SEER/HSPF/SCOP) of the LG model chosen, the quality of the installation and the installation location . We support our customers in the Plateau, Montreal , Laval , Longueuil , North Shore and South Shore for:
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check the conformity of the selected model;
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prepare photographic evidence and detailed invoices;
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optimize the project (power, location, configuration) in order to meet the required performance criteria.
AirGreen Tips for High-Rise and Open-Plan Rooms
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Favor useful height : place your head high enough to avoid obstacles and extend the range of the jet.
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Take care with the angle of the shutters : a horizontal sweep limits stratification under the ceiling.
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Reduce lengths : a short refrigeration route improves efficiency and reduces the risk of breakdown.
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Think about noise : the LG heat pump is discreet, but the choice of outdoor location remains decisive (keep bedrooms and neighbors away).
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Provide access : filters and cover must be able to be opened without dismantling the light fixture or furniture.
Conclusion
This LG wall-mounted heat pump installation in the Plateau-Mont-Royal demonstrates how elevated positioning and an optimized technical path transform the comfort of an open-plan Montreal space. With Dual Inverter modulation, reliable gravity drainage, and rigorous commissioning, the system delivers efficient winter heating and summer cooling , while preserving the room's aesthetics. Our teams operate with the same high standards in Montreal, Laval, Longueuil, and on the North and South Shores for durable and efficient HVAC installations .