Four-season comfort for a condo in Chomedey: our AirGreen method, from technical inspection to commissioning
Client context and objectives
At AirGreen , we were commissioned by a co-owner in Chomedey (Laval) who wanted a compact, quiet, and reliable HVAC system to cool in the summer and heat in the off-season. The home is a condo with a concrete balcony overlooking a green courtyard. The choice fell on a Zephyr wall-mounted heat pump (residential range), sized to ensure the comfort of an open main living space. The challenge: a clean, durable, and compliant installation , with a neat aesthetic on the facade side and a minimal noise level to preserve the tranquility of the neighborhood.
What we install and why
The chosen solution
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Machine type: wall-mounted heat pump (mini-split) , ideal for co-ownerships due to its compactness and efficiency.
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Brand: Zephyr , renowned for its good performance/price ratio, its discreet outdoor units and ease of maintenance.
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Target capacity: typical rating ≈ 12,000 BTU for a standard-sized condo (after calculating thermal load based on orientation, glass surfaces and insulation).
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Performance objectives: consistent comfort, low consumption , and quiet operation .
Benefits for everyday life
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Heating and air conditioning with a single machine.
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Inverter modulation (variable speed) to maintain a stable temperature and limit electrical peaks.
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Simplified HVAC maintenance (regular cleaning of indoor filters, annual inspection of the outdoor unit).
Visible installation details and AirGreen best practices
Installation of the outdoor unit
We place the Zephyr unit on a raised aluminum support fixed to the concrete balcony.
Concrete benefits:
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Water and snow protection : ground clearance that prevents the accumulation of moisture and debris.
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Vibration reduction : anti-vibration pads under the anchor points to preserve the structure and acoustic comfort.
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Clearances respected : the unit breathes, ensuring optimal air flow on the suction and blowing sides.
Why not wall brackets? In this context, the balcony provides a rigid and flat base , limits vibration transmission to the adjacent brick wall, and facilitates maintenance (defrosting, washing the condenser).
Drilling, connection paths and sealing
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Core drilling through the wall adjacent to the balcony to route the refrigeration lines , the communication cable and the condensate drain .
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Pipe bending radius respected, continuous insulation and butyl tape at the crossings to prevent air and moisture infiltration.
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Exterior polyurethane sealant with collar for a durable and clean finish.
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Typical connection length : 3 to 5 m between the interior wall head and the condenser, ideal for limiting pressure losses and simplifying maintenance.
Condensate management
In this condo, we favor gravity drainage (continuous slope and discreet outlet). When the slope is not possible, we install a silent condensate pump with integrated tray and anti-siphonage , but here, the configuration allows a solution without additional electromechanical components — a guarantee of simplicity and reliability.
Power supply and compliance
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Dedicated circuit from the panel: circuit breaker suitable for the machine nameplate.
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External disconnect box near the condenser for safe interventions.
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Grounding and RBQ/Code compliance . At AirGreen, we systematically document the installation (photos, serial numbers) and provide the customer with a commissioning file .
Commissioning: rigor and traceability
Quality procedures
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Nitrogen test to validate the tightness of the connections.
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Deep vacuum at the micron level to ensure a dry and clean circuit.
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Opening of the valves , balancing of the fluid and recording of the parameters : suction and discharge temperatures, intensity, pressures, delta T on the interior side.
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Acoustic check : operation at different speeds to ensure contained noise on the balcony and inside.
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User training : heating/cooling modes, fin adjustment, filter maintenance, energy optimization advice.
Result: measurable comfort and careful finishing
What the customer notices immediately
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Rapid temperature reduction in air conditioning mode and gentle heat in auxiliary heating mode.
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Perceived silence on the balcony thanks to the anti-vibration support and optimized positioning .
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Discreet aesthetics : clean wiring and drilling, no runoff on the facade.
What the installation guarantees over time
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Stable performance thanks to the respected air release.
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Easy maintenance : easy access to the condenser, cleaning of the external battery without complex disassembly.
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Longevity of refrigeration connections and protected insulation.
HVAC Operation and Maintenance Tips (Montreal and Laval)
To get the most out of your wall-mounted heat pump
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Maintain a moderate and constant setting ; avoid thermostat yo-yoing.
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Clean the interior filters every 4 to 6 weeks during peak season.
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Clear the outdoor unit in winter (ice, leaves, dust) to preserve air flow .
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Schedule annual HVAC maintenance : electrical inspection, cleaning of exchangers, checking of condensates, checking of parameters.
Grants and Eligibility
Depending on the configuration and efficiency certification of the chosen model, Quebec programs (e.g., when the equipment is Energy Star certified and designed for cold climates) may offer incentives. We validate eligibility for you and prepare the file . Our teams also support residents of Montreal , Laval , Longueuil , as well as on the North Shore and the South Shore .
Pitfalls to avoid (AirGreen feedback)
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Undersize or oversize the machine: an incorrect size is detrimental to comfort and consumption. We systematically carry out a load calculation .
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Neglecting clearances around the condenser: lack of air reduces efficiency and accelerates frost in winter.
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Poorly sealed openings : sources of infiltration, mold and energy losses.
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Lack of suitable support : installation flush with the ground or without anti-vibration devices increases noise and wear.
Why choose AirGreen in Laval and Greater Montreal?
We combine field engineering , quality workmanship and after-sales follow-up . Our certified installers respond quickly in Laval , Montreal , Longueuil , on the North Shore and the South Shore , with a clear approach: diagnosis , impeccable HVAC installation , documented commissioning , then scheduled HVAC maintenance . The result: a high-performance, durable and pleasant Zephyr wall-mounted heat pump for everyday use.
Quick project sheet (Chomedey)
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Building: condo with concrete balcony (brick facade).
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System: Zephyr wall-mounted heat pump , capacity ~12,000 BTU (depending on load).
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Exterior installation: raised aluminum support with anti-vibration pads , mechanical anchors.
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Route: clean drilling, 3–5 m connections , PU caulking + collar.
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Condensates: gravity drainage .
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Power supply: dedicated circuit + external disconnection .
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Tests: nitrogen, deep vacuum , commissioning readings.
Are you considering an HVAC installation in Laval (Chomedey, Sainte-Dorothée, Vimont) or elsewhere in Greater Montreal ? We size, install, and maintain your wall-mounted heat pump for lasting comfort, summer and winter.