An exemplary outdoor installation on a stone bed for four-season comfort
In Sainte-Dorothée, we installed a Sharp Eco Inverter wall-mounted heat pump for a newer home with contemporary finishes. The homeowner's goal: an efficient, quiet, and durable HVAC solution capable of providing summer air conditioning and reliable heating backup in the fall—without compromising the aesthetics of the facade or the drainage areas around the foundation.
Context of the residency and technical issues
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Single-family home with plaster siding and high-performance windows.
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Perimeter of the foundation laid out in draining white stones , presence of a window well in the basement.
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Rainwater downpipe on the facade, limited pedestrian traffic on the courtyard side.
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Customer priorities: visual discretion, cleanliness of the course , simplified maintenance, stable performance in cool weather.
These constraints require a compact, raised condenser, perfectly ventilated and capable of withstanding the freeze/thaw cycles specific to Laval.
Why the Sharp Eco Inverter for this project
The Sharp Eco Inverter is a wall-mounted heat pump known for:
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Fine modulation : the inverter compressor adjusts power to demand, reducing on/off cycles, noise and consumption.
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Stable interior comfort : the air is distributed evenly, limiting temperature differences between rooms.
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Plasmacluster Filtration : purifies indoor air, a plus for seasonal sensitivities.
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Optimized template : easy to maintain clearances near a basement window and downspouts.
Our HVAC installation method on draining ground
1) Choice of location and clearances
We position the condenser at the prescribed distance from openings, away from direct gutter runoff and away from winter shoveling areas. Rear and side clearances are maintained to ensure free air circulation and facilitate maintenance.
2) Raised anti-corrosion support
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Aluminum frame placed on four sturdy feet: no direct contact with the ground, better evacuation of water and snow.
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Useful height designed to maintain free air intake in winter and protect equipment against accumulations.
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Stainless steel screws and integrated silent blocks to limit vibration transmission to the structure.
3) Foundation and drainage management
The installation is done on a clean and stable stone bed . We maintain the French drain plan: no obstruction to the flow of water. The supports are wedged to prevent sinking and to remain level with seasonal expansion.
4) Clean and discreet refrigeration route
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Continuously insulated refrigerant connections , protected by a harmonized external capping , running to the sealed piercing.
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Drain radius and slopes respected for safe gravity drainage of condensation from the indoor unit.
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Line length optimized to limit load losses and offer the best seasonal efficiency .
5) Secure power supply
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Dedicated circuit sized according to the appliance nameplate, with appropriate panel protection.
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External disconnection accessible near the condenser (out of splashes), essential for maintenance and safety.
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UV-coated cable routing for long-lasting durability.
6) Meticulous commissioning
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Nitrogen pressure test then deep vacuum until stabilization, ensuring a dry and reliable circuit.
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Superheat/subcool control, intensity reading, validation of fan rotation direction and static pressure.
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Checking the silent modes and the outdoor sensor for smart defrosting in cold weather.
Result: performance, silence and aesthetics respected
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Four-season comfort : rapid cooling of living areas and efficient additional heating between 0 and −10°C, reducing the use of electric baseboard heaters.
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Successful visual integration : clean capping, discreet condenser, no nuisance for the basement window.
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Simplified maintenance : clear clearances, accessible components, disconnection within easy reach.
AirGreen Best Practices for Ground-Based Installations
Implementation and winter protection
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Maintain a clearance of 30 to 45 cm below the base to avoid packed snow.
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Provide a deflector if the gutter is located in the axis of cold blowing or prevailing winds.
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Avoid recesses or angles that create turbulence and frost.
Drain and foundations
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Maintain the continuity of the stone bed : no massive slab that would block runoff.
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On soft ground, use footings or light screw piles under the feet to prevent subsidence.
Lines and drillings
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Continuous insulation all the way to the inside, controlled thermal breaks .
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Waterproofing of the facade with materials compatible with the plaster, in order to avoid micro-infiltrations and cracks.
HVAC Maintenance: Recommended Schedule
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Spring : cleaning the outdoor coil, checking the chassis, tightening the terminals and testing for condensation.
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Summer : inspection of filter(s) and expansion parameters, dB(A) check in night mode.
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Autumn : verification of defrosting algorithms , condition of insulation and UV sheaths.
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Winter : Periodic clearing of snow around the unit, without covering the machine.
Our HVAC maintenance contracts include seasonal performance reports, which are helpful in maintaining warranty and extending lifespan.
What to avoid
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Place the condenser flush with the ground : risk of the grilles being blocked by snow and splashes during thawing.
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Reduce clearances to “hide” the unit: efficiency would drop and frost would increase.
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Drilling near a window well without adequate drain slope: danger of water backup.
Deadlines, coordination and service
For a detached house like in Sainte-Dorothée:
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Technical visit : validation of the layouts, electrical gauge and exact positioning.
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Installation : generally in one day , including testing.
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Provision of a user guide and comfort settings (time slots, silent mode, shutter orientation).
Grants and support
Depending on the capacity and low temperature performance, a wall-mounted heat pump may be eligible for assistance programs in Quebec. We verify eligibility, prepare documents and offer financing solutions for Montreal , Laval , Longueuil , as well as the North Shore and the South Shore .
Why entrust your project to AirGreen?
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HVAC expertise specific to the realities of Greater Montreal: draining soils, harsh winters, plastered facades, basement windows.
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Durable and careful installations: anti-corrosion supports, waterproof routes, UV-protected cabling, instrumented commissioning.
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Responsive after-sales service : maintenance, parts and seasonal optimizations.
Are you planning an HVAC installation in Laval or Greater Montreal?
We size your wall-mounted heat pump , taking into account the house envelope, priority rooms, and exterior aesthetics, then we carry out a clean, quiet, and durable installation—just like in Sainte-Dorothée.