A precise, clean and quiet system for a Montreal apartment
At AirGreen , we have just installed a Sharp ZHU1 wall-mounted heat pump in an apartment located in Rosemont–La Petite-Patrie . The client's goal was clear: achieve four-season comfort while reducing their electricity bill, with recent R-32 refrigerant equipment and a careful layout, compatible with condominium living.
Housing context and choice of equipment
The home is a plex apartment with a large patio door opening onto a balcony. The main space is rectangular, has a textured ceiling, and benefits from good solar gain. We recommended a single-zone Sharp ZHU1 because of:
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its compact format and discreet front;
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its inverter compressor providing fine modulation of heating and air conditioning;
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its operation with R-32 , more efficient and with lower GWP than R-410A;
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its high heating efficiency for the Montreal climate, with capacity maintained below zero;
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its electronic card optimized for defrost cycles, limiting jolts and losses of efficiency.
This profile makes her a serious candidate for the grant programs available in Quebec for high-performance heat pumps , particularly for residences in Montreal, Laval, Longueuil, the North Shore and the South Shore . We support our clients in verifying eligibility and preparing files.
Interior layout: even diffusion and clean finishes
The indoor unit is positioned above the patio door , at a height that promotes air intake and diffusion into the open area . This placement limits obstacles (load-bearing walls, beams) and frees up circulation .
Key points of the interior installation :
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Connection path at the top of the wall, in discreet molding matching the light walls; the sections are clipped at regular intervals for a perfect fit.
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Single hole through the exterior wall near the head: minimized heat loss and sealing restored with a sleeve and clean sealing.
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Gravity condensate drain with controlled slope: no pump, therefore zero added noise and less maintenance.
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Electrical calibration checked on the panel, with dedicated circuit and appropriate protection, in accordance with current standards.
The result: a neat aesthetic and stable blowing that effectively covers the main room without unpleasant drafts.
Outdoor installation: stability, defrosting management and peace of mind for the neighborhood
On the balcony, the Sharp Eco Inverter outdoor unit is installed on a raised galvanized steel support . We chose this configuration for:
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clear the air intake and exhaust ;
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raise the compressor above snow and defrost puddles;
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simplify seasonal maintenance.
Visible details and best practices applied :
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Anti-vibration pads under the support points of the support: they limit the transmission of micro-vibrations in the structure of the balcony and preserve the peace and quiet of the neighbors.
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Short path for refrigerant connections between interior and exterior: only around 2 to 3 m , guaranteeing optimal efficiency and a controlled refrigerant charge.
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Drain pipe oriented and fixed neatly towards the bottom of the balcony, to evacuate defrost water in winter and condensation water in summer without splashing onto the floors below.
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Clearances respected at the rear and front of the unit: the side grille breathes freely, which reduces the duration of defrost cycles .
We systematically lay a protective mat or check the nature of the covering to avoid any punctures from the support feet. The assembly is anchored and leveled ; the tightening torques are checked.
Technical steps and commissioning checks
Our RBQ/CCQ certified technicians proceed according to a proven protocol:
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Flares and collars made with calibrated tools; visual and feeler control.
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Deep vacuum draw until a stable vacuum level is reached; hold test to check for absence of moisture/residue.
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Fluid opening and leak control with electronic detector.
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Performance measurements : supply/return temperatures, current, indoor static pressure, and subcooling verification according to ambient conditions.
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Configuration of useful parameters (automatic scanning, fan curve, automatic restart after failure).
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Explanations to the customer : instructions for use in very cold weather, filter maintenance, and good practices in co-ownership.
Result: immediate comfort and recurring savings
From the moment it was switched on, the temperature stabilized quickly, with a very low noise level both inside and outside. The customer benefits from:
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efficient heating during the cold weather at the end of winter and mid-season;
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gentle air conditioning in summer, without overcooling;
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lower consumption compared to fixed electric radiators, thanks to Inverter modulation and more efficient R-32 .
What makes the AirGreen difference
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Custom design : we adapt the location of the units and the route of the connections to the architecture of the plexes, condos and houses of Greater Montreal .
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Impeccable finishes : aligned cappings, clean seals, management of gravity drain and defrost water to avoid any nuisance.
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Compliance with standards : RBQ and CCQ compliant practices, and complete documentation for maintenance and grant applications.
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Ongoing Service : Annual HVAC maintenance offered (evaporator cleaning, fan check, electrical inspection, condenser soft wash).
Practical advice for the owner
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Filters : vacuum or rinse monthly during periods of heavy use.
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Winter : Leave space under the outdoor unit free for defrost drainage; avoid piling snow against the support.
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Summer : Keep the side grille clear of balcony furniture or flower boxes.
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Programming : aim for a stable setpoint (20–22°C for heating, 23–25°C for air conditioning) to maximize efficiency.
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Annual maintenance : a preventive maintenance visit extends the lifespan and maintains initial performance.
Wherever you are, we respond quickly
Our teams cover Montreal , Laval , Longueuil , as well as the North Shore and the South Shore . We install and maintain wall-mounted and central heat pumps from recognized brands: Sharp, Gree, Fujitsu, Midea, Lennox , and others. Each project is subject to a technical study , a rigorous HVAC installation and administrative support when assistance is available.
AirGreen delivers clean, sustainable and efficient projects – from the first quote to the first night of comfort.