Discreet comfort in a family living area in Laval
In Chomedey (Laval) , we installed a Gree Inverter wall-mounted heat pump to cool and heat an open-plan living area combining the dining room and living room. The goal: to provide consistent comfort year-round, reduce electricity consumption, and integrate the unit without disrupting the aesthetics or circulation. Our approach relies on precise sizing , a short refrigeration path , careful condensate management , and methodical commissioning —all elements that make the difference for a sustainable HVAC installation in Greater Montreal.
Thermal analysis and capacity selection
Before finalizing the configuration, we carry out a load assessment taking into account the glazed surfaces, the orientation, the air permeability of the joinery and the volume of the room:
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Open living area with access to the living room and wall fireplace.
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Standard ceiling height, moderate internal inputs (lighting, household appliances).
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Typical insulation of a recent urban construction in Laval.
This profile often leads to a selection between 9,000 and 12,000 BTU/h for the main head. Inverter modulation ensures temperature precision in both summer and winter, while limiting on/off cycles responsible for excess consumption.
Head positioning: efficiency and aesthetics
The indoor unit is placed high up on a clear wall in the dining room, at a reasonable distance from light fixtures and decorative elements. This placement offers:
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Uniform diffusion thanks to the air stream directed towards the occupied zone.
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The absence of recirculation against the ceiling, thanks to the adjusted orientation of the shutters.
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Easy access for filter maintenance and exchanger cleaning.
To avoid any disruption to the airflow, we secure the light fixture's suspension cables, check the blind stops, and maintain the recommended clearances around the fixture's front. Floor space remains free, making it suitable for family living areas.
Refrigeration connections: short journeys and brazing under nitrogen
The performance of a heat pump depends as much on the machine as on the quality of installation:
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Through hole at the back of the head, with slight fruit (slope) and vapor barrier sleeve .
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High density insulated copper , bending radii respected and collar protection.
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Silver brazing under nitrogen purge to limit internal oxidation and ensure clean joints.
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UV and impact resistant exterior capping to protect lines and drain.
The short refrigeration path limits pressure losses, which improves efficiency in heating mode, particularly during the cold weather on the North Shore .
Condensate management: priority to gravity
We favor a silent and reliable gravity drain :
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Controlled slope between 1% and 2% over the entire length.
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Anti-siphon if necessary to prevent odors from rising.
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Discharge to a disposal point in accordance with the rules of the art.
This solution avoids the need for a lift pump and reduces the risk of breakdown. During annual HVAC maintenance , we rinse the tank, check the continuity of the drain, and disinfect the line.
Power supply and electrical protection
In accordance with the Code and RBQ standards, we plan to:
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Dedicated circuit from the main panel with suitable gauge and grounding.
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Outdoor disconnect box within easy reach near the condenser.
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Torque tightening on terminal blocks, clear identification of conductors, polarity control.
These controls ensure the safety of the installation and facilitate maintenance.
Outdoor unit: silence, stability and durability
The Gree outdoor unit is installed on suitable brackets or frames depending on the available support:
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Anti-vibration pads to cut off transmission to the building.
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Clear height to prevent snow accumulation and ensure defrost drainage.
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Clearances respected around the suction and blowing faces.
In urban areas such as Montreal , Laval or Longueuil , respecting these clearances reduces perceived noise and improves performance in cold climates.
Commissioning: the AirGreen method
The start-up is documented and includes:
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Nitrogen pressure test , leak test.
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Deep evacuation down to ≤ 300 microns and stability test.
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Check subcooling/superheat and supply/intake air temperatures.
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Setting of speeds , shutters and useful options (night mode, anti-draft).
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Customer training : stable instructions, programming, seasonal usage advice.
This method ensures performance in accordance with specifications and increased longevity.
Technical details, usage tips and results for the customer
What the Inverter range brings to everyday life
Inverter compressors adjust power to actual needs:
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Stable comfort without sudden temperature variations.
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Significant reduction in consumption compared to electric baseboard heaters or an on/off air conditioner.
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Controlled sound levels , useful in the evening in a dining room open to the living room.
In summer, the wall-mounted air conditioner function efficiently manages sensitive load and humidity. In winter, some Gree models maintain good capacity down to -25°C (depending on the series), which covers the majority of conditions encountered on the South and North Shores .
Grants and Eligibility
Several Gree configurations may be eligible for assistance programs in effect in Quebec if the AHRI number appears on recognized lists and if the low temperature operating range meets the criteria. Our team:
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checks eligibility before signing,
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provides the detailed invoice and the required photo evidence ,
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advises on installation requirements (capacities, defrosting, winter accessories).
This assistance simplifies the process and helps reduce the overall cost of the project in Montreal, Laval, Longueuil, North Shore and South Shore .
Recommended HVAC maintenance
Regular maintenance preserves performance and warranty:
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Clean the filters every 4 to 6 weeks during use.
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Wash the evaporator, turbine and condensate tray once a year.
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Checking electrical connections , inspecting insulation and capping .
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Checking service settings and updating usage guidelines.
We record these actions in a report useful for tracking equipment.
Points of attention in a dining room
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Light fixtures and pendants : secure the cables so as not to obstruct the blowing or generate vibrations.
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Natural convection near the fireplace**: orient the shutters so that the air jet limits stratification.
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Floor clearance : avoid placing tall furniture under the headboard to maintain service access and good air circulation.
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Wall protection : a vapor barrier seal and a slope at the opening prevent moisture transfer.
Results obtained
Upon commissioning, the customer notes:
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a uniform temperature in the living area, without cold areas near the windows;
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rapid response in air conditioning during hot episodes;
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a discreet noise level compatible with meals and moments of relaxation;
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better controlled consumption thanks to Inverter modulation.
Why AirGreen
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Precise diagnosis and sizing adapted to the reality of your home.
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Compliant and clean HVAC installation , carried out by trained technicians.
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Support for grants , from preparing the file to submitting evidence.
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Local and responsive after-sales service in Laval , Montreal , Longueuil , on the North Shore and the South Shore .
Summary of the intervention
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Type : Gree wall-mounted heat pump , residential inverter range .
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Interior location : dining room wall, clearances respected, shutter orientation optimized.
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Connections : insulated copper, brazing under nitrogen , UV capping ; short path.
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Condensates : gravity drain with controlled slope.
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Electricity : dedicated circuit, external disconnection , complete identification.
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Commissioning : pressure test, vacuum ≤ 300 microns , adjustments and training.
This achievement in Chomedey illustrates our promise: a clean, reliable and efficient HVAC installation , designed for the pace of life of a Laval family and for the winters of Greater Montreal.