On the flat roof of a residential building in Southwest Montreal, we recently replaced an old air conditioning system with a Sharp ECO Inverter wall-mounted heat pump with Plasmacluster technology . This solution was perfectly suited to the realities of Montreal condominiums and apartments: limited space, noise restrictions, roof access, and of course, our harsh winters.
Context: an urban building, comfort in need of modernization
The building is typical of the Southwest (Griffintown / Saint-Henri) : brick structure, several dwellings, mechanical equipment grouped on the roof and high urban density.
The client wanted:
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Replacing an older, less efficient system;
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Improve comfort in both summer and winter ;
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Reduce your energy consumption;
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Limit the noise for the neighbors, both inside and on the roof.
The chosen solution: a Sharp ECO Inverter wall-mounted heat pump , connected to one or more indoor wall-mounted heads, ideal for apartments or condos where it is not possible to install a central ducted system.
Choosing the Sharp ECO Inverter wall-mounted heat pump
Inverter technology for stable comfort
The Sharp ECO Inverter range continuously adjusts the compressor speed. Specifically:
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The heat pump keeps starting and stopping;
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The indoor temperature remains stable, without large fluctuations;
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Electricity consumption is reduced compared to a traditional "on/off" device.
This is particularly interesting in Montreal, where the inter-seasons (spring, autumn) represent a good part of the year: the heat pump then operates at low power , maintaining constant comfort with a minimum of energy.
Plasmacluster: healthier indoor air
The Ion Plasmacluster logo clearly visible on the outdoor unit recalls one of Sharp's technological signatures: an air purification system integrated into compatible indoor units.
For the customer, this translates to:
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A reduction in odors and certain suspended particles;
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More pleasant indoor air, which is appreciated in an urban apartment surrounded by traffic and pollution;
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A heating/air conditioning system that not only manages the temperature, but also contributes to overall well-being .
Details of the outdoor installation on a flat roof
The photo clearly shows several key elements of our work:
1. Sturdy raised stand
The Sharp heat pump is installed on a metal base, which is itself fixed to wooden crossbeams resting on structural bases. This assembly serves several purposes:
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Protect the unit against the accumulation of snow and ice;
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Ensure excellent water drainage on the roof membrane;
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Limit the transmission of vibrations to the building structure.
We use anchors and supports sized to withstand the strong winds that can be encountered on the roofs of the Southwest, particularly near the Lachine Canal and major arteries.
2. Management of clearances and ventilation
The Sharp condenser is positioned so that:
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Maintain sufficient clearance at the rear and sides to allow for optimal airflow;
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Avoid recirculating hot air between the different units present on the roof (LG, other heat pumps);
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Preserve an access corridor for maintenance, without hindering other mechanical equipment.
Good clearance is essential to guarantee the performance of the heat pump in the heat of summer as well as in periods of extreme cold.
3. Protected refrigeration and electrical connections
Refrigerant pipes and electrical cables are bundled, insulated, and protected within a conduit before being routed into the building. We pay particular attention to:
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Insulating the lines to reduce energy losses;
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Protection against UV rays, snow and ice;
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The correct slope for the drainage of any condensate, where applicable.
This type of finish ensures the durability of the system and reduces the risk of leaks or premature breakage.
Interior: Custom-designed comfort for the condo
Although the photo focuses on the exterior, the system is connected to at least one Sharp wall head installed inside the apartment.
The advantages for the occupant:
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High-performance air conditioning in summer , even in the middle of a heatwave;
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Efficient heating in the shoulder seasons and winter , allowing relief from electric baseboard heaters or reducing the use of an existing system;
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It is possible to adjust the temperature to within half a degree depending on the room.
The customer now has:
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A silent system, with minimal noise inside;
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A remote control (or wall controller) to adjust the temperature, mode, and fan speed;
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Advanced functions (timers, dehumidification, sometimes Wi-Fi depending on the configuration).
Performance and Quebec winter
Installing a heat pump on a roof in Montreal requires thinking about winter first :
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The height of the support allows the unit to breathe even when the roof is covered with snow;
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The location facilitates automatic defrosting of the unit;
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The customer benefits from more economical heating than electric baseboard heaters, while maintaining excellent reliability in cold weather .
Modern Sharp heat pumps are designed to operate in sub-zero temperatures, making them a very attractive option for a neighborhood like the Southwest, where older buildings stand alongside new towers and every gain in energy efficiency is felt on the bill.
Why choose AirGreen for a Sharp heat pump in the Southwest?
At AirGreen, we install and maintain Sharp wall-mounted heat pump systems throughout Greater Montreal: Southwest, Verdun, Ville-Marie, Rosemont, Laval, North Shore and South Shore.
By choosing us, you will benefit from:
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From a personalized analysis of your accommodation (orientation, insulation, room configuration);
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Appropriate sizing : we do not oversize, we do not undersize;
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From a team of certified technicians, experienced in flat roofs, condominiums and access constraints;
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Support for grant programs when available;
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From a responsive after-sales service, with maintenance and repair throughout the lifetime of your system.
A similar project for your condo or apartment?
Whether you own a condo in the Southwest, rent a multi-unit building in Verdun, or live in an apartment in Ville-Marie, a Sharp ECO Inverter wall-mounted heat pump can transform your everyday comfort:
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Pleasant and stable coolness in summer;
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Economical heating for a large part of the winter;
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Cleaner air thanks to Plasmacluster technology;
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Discreet installation, both indoors and on the roof.
Want to know if this type of installation is possible in your home?
We will come to your home free of charge to assess your situation and offer you the best Sharp heat pump configuration for your home.