Project

Installation of a Sharp wall-mounted heat pump in Rosemont–La Petite-Patrie (Montreal)

In Rosemont–La Petite-Patrie, our AirGreen team installed a Sharp ECO Inverter wall-mounted heat pump on a wooden balcony, featuring a raised condenser, a clean finish, and quiet operation. An ideal solution for year-round comfort and lower energy bills in a Montreal duplex.

By AirGreen Climatisation & Chauffage Admin6 min read
Installation of a Sharp wall-mounted heat pump in Rosemont–La Petite-Patrie (Montreal)
Installation of a Sharp wall-mounted heat pump in Rosemont–La Petite-Patrie (Montreal)
Generic diagram: wall-mounted heat pump, indoor and outdoor units

In summer, the outdoor unit rejects the house's heat outside.

Generic illustration of this type of installation, not a survey of this job site. Tap a number.

  1. Mounted level on a wall plate, high enough for the air to reach the whole room, with enough space around it to slide the filters out easily.

  2. The refrigerant lines, the communication cable and the drain go through the wall in a single opening, sealed against water, cold air and insects.

  3. Two insulated copper pipes connect the two units. Outside, a line cover can protect them from sun, knocks and weather.

  4. A shut-off switch near the outdoor unit isolates it safely for service. It must stay accessible at all times.

  5. The compressor and the fan. In heating mode it captures heat from the outdoor air, even in winter, and moves it inside.

  6. On the ground or on the wall, it keeps the unit above accumulated snow. The unit stays clear and defrost water can drain away.

  7. The fan needs to blow freely. Storage, a fence or a wall too close, and efficiency drops while noise goes up.

In Rosemont–La Petite-Patrie, families are increasingly seeking heating and cooling solutions that are efficient, quiet, and economical. In this project, our AirGreen team was tasked with replacing an old, energy-inefficient electric system with a Sharp wall-mounted heat pump featuring ECO Inverter and Ion Plasmacluster technology , perfectly suited to Montreal's climate and the realities of the typical plexes in this neighbourhood.


Context: a wooden balcony, a brick facade, and limited space

The client lives on the ground floor of a brick duplex with a wooden rear balcony. The main constraints are:

  • Limited space on the terrace: it was necessary to maintain space for circulation and outdoor furniture.

  • Brick facade opening directly onto the balcony, without a cement strip on the floor.

  • A tap and a garden hose are located nearby and must be used for grounds maintenance.

  • Close proximity : the condenser had to remain very quiet to preserve quality of life.

Our solution: the installation of a Sharp single-zone wall-mounted heat pump , from the residential ECO Inverter range (typical configuration of a Sharp ZU1 model), mounted on a raised support to optimize clearances and durability.


Why a Sharp wall-mounted heat pump in Rosemont?

Sharp wall-mounted heat pumps stand out because of:

  • Their Inverter technology modulates power instead of operating in on/off mode, thus reducing energy consumption and temperature variations.

  • The Ion Plasmacluster system, which helps to purify the air by neutralizing certain particles and odors – a major advantage in urban dwellings where one wants to limit the opening of windows onto a busy street.

  • Quiet operation , both for the indoor unit and the outdoor condenser, ideal for the alleys and backyards of Rosemont.

In this project, the heat pump is sized to offer excellent comfort in the main living area (open-plan living room, dining room and kitchen), while also providing a significant boost in the adjacent rooms.


Technical details of the outdoor installation

A well-positioned Sharp condenser

The Sharp ECO Inverter condenser has been:

  • Installed on a raised galvanized steel support , securely fixed to the wooden floor of the balcony.

  • Positioned at a sufficient distance from the brick wall to ensure good rear clearance and facilitate air circulation.

  • Slightly off-center from the patio door to free up the passage area and minimize the visual impact from the inside.

The raised support allows for:

  • To protect the condenser from snow, ice and standing water on the terrace.

  • To reduce the risk of mechanical shocks (shovels, objects, furniture).

  • To facilitate drainage and cleaning under the unit.

We systematically use suitable brackets and anchors , with vibration damping to limit the transmission of structural noise to the balcony and, consequently, to the building structure.

Connections and power supply

In the photo, we can see:

  • A dedicated power supply in an external enclosure, compliant with the Electrical Code, in the immediate vicinity of the condenser.

  • Neat management of cables and refrigeration connections , discreetly routed into the dwelling.

  • Respecting clearances from the outdoor tap and garden hose , in order to maintain accessibility for watering and maintaining the terrace.

Everything is designed to ensure that the installation is efficient, safe and aesthetically pleasing .


Details of the indoor installation (Sharp wall head)

Inside, a Sharp wall-mounted mini-split heat pump unit was installed:

  • On a central wall of the living area , allowing for uniform distribution of air conditioning in summer and hot air in winter.

  • At an optimized height to ensure good room sweeping, while avoiding direct blasts on the occupants.

  • With a carefully planned condensate drainage system to avoid any risk of leaks or water damage.

The ECO Inverter + Plasmacluster combination offers the customer:

  • A very stable level of comfort , without unpleasant drafts, hot or cold.

  • Improved air quality , thanks to air treatment by Sharp's specific ionizing module.

  • Intuitive operation via remote control, with different modes (heating, air conditioning, dehumidification, ventilation).


Winter performance: ready for Montreal's climate

Even though Rosemont–La Petite-Patrie is in the heart of Montreal, the climate is anything but mild: bitter cold, freezing rain, and rapid temperature changes. The Sharp wall-mounted heat pump installed here is designed for:

  • Maintaining a good heating capacity even in cold weather , thanks to Inverter technology and compressor optimizations.

  • Significantly reduce the use of auxiliary heating systems (electric baseboard heaters, convectors), resulting in recurring savings on the electricity bill.

  • Offering increased reliability , provided that regular maintenance is carried out (cleaning of internal filters, inspection of the condenser, removal of snow).


Aesthetics, acoustic comfort and neighborhood

In the alleyways and backyards of Rosemont, outdoor units are often very visible and close to neighbors. Therefore, we paid particular attention to:

  • The visual alignment of the condenser with respect to the brick facade.

  • Noise reduction : dampened support, silent Sharp condenser, instructions to the customer for night programming.

  • Circulation around the unit : the condenser is sufficiently clear to allow maintenance of the balcony and brick cladding.

The result: a discreet system that blends well into the decor and does not disturb the occupants or the neighborhood.


The benefits for the customer

Following the installation of this Sharp wall-mounted heat pump in Rosemont–La Petite-Patrie , the client now benefits from:

  • Four-season comfort : efficient air conditioning in summer, efficient heating in the shoulder seasons and winter.

  • Substantial energy savings compared to heating with electricity alone.

  • With improved air quality , thanks to Ion Plasmacluster technology.

  • A safe, clean and durable installation , carried out by a certified team that is fully aware of the realities of Montreal buildings.


Why entrust your project to AirGreen?

At AirGreen , we assist homeowners in Montreal, Laval, the North Shore and the South Shore in choosing and installing wall-mounted heat pumps adapted to their specific needs:

  • Detailed analysis of the dwelling and heating/air conditioning needs.

  • Selecting the correct Sharp (BTU) capacity to avoid oversizing or insufficient power.

  • Compliance with electrical and mechanical standards and best practices for residential HVAC.

  • Neat, aesthetically pleasing work, with an absolute priority on long-term reliability .

  • After-sales service and maintenance to maximize the lifespan of your system.

If, like this customer from Rosemont–La Petite-Patrie, you want to improve your comfort while reducing your energy costs, a Sharp wall-mounted heat pump installed by AirGreen is a solution to seriously consider.

The steps

How it goes, from the first call to the end

The main steps of this kind of job at AirGreen. Every house has its quirks: the estimate brings them out.

Step 1 of 9The on-site estimate

We look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.

  1. The on-site estimateWe look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
  2. The quoteModel, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
  3. Getting readyFloors and furniture protected, wall plate position marked level, wall opening located.
  4. The wall openingA single opening, with the slope the drain needs to flow outside.
  5. The outdoor unitSet on a stand raised above the snow, with the clearances the manufacturer requires.
  6. Lines, cable and drainConnected, insulated and protected. The opening is then sealed against water, cold air and insects.
  7. The electrical workA dedicated circuit and an accessible disconnect near the outdoor unit.
  8. Tests and start-upLeak test, vacuum, then start-up and a check of heating and cooling.
  9. The walkthroughRemote, modes, filters: we show you the essentials before we leave.
Your numbers

And at your place?

Two quick checks with real numbers: what heat costs, and what your current heaters add up to in BTU/h.

Size checkYour baseboards, in BTU/h
–BTU/h of installed electric heat

    Conversion: 1 W = 3.412 BTU/h. An indication, not a load calculation: baseboards and furnaces are often stronger than the real need, and they can stay as backup. AirGreen confirms the capacity on site.

    Through the seasons

    What to do, season by season

    Three habits per season for this unit. They take a few minutes and prevent many calls.

    • Clean the indoor unit's filters.
    • Clear leaves and debris left on the outdoor unit by winter.
    • Test cooling before the first hot days.
    And at your place?

    Which type of equipment for your project?

    Pick what looks like your need.

    Mistakes avoided

    Four mistakes we do not make

    Flip each card to see what we do instead.

    Frequently asked questions

    What people ask us about this kind of work

    12 questions
    Does a wall-mounted heat pump heat in winter?
    Yes, it heats and cools. Its capacity drops in very cold weather; the operating range depends on the model and is listed on its spec sheet.
    Wall-mounted or multi-zone: how do I choose?
    One wall head and one condenser outside: the direct solution for a room or an open area. For two to five rooms, a multi-zone puts one head in each room on a single condenser.
    Where does the outdoor unit go?
    Where it stays above the snow, clear and accessible, away from walkways. We decide it with you during the estimate.
    Are there grants?
    Depending on the model and your situation, assistance programs may apply, including Hydro-Québec's LogisVert. AirGreen checks the model number before quoting an amount. See the grants.
    Do I need a permit?
    Rules vary from city to city: location, distances, noise. See permits and by-laws, and we check for your address.
    How cold can it heat?
    It depends on the model. According to Hydro-Québec, newer models work down to a temperature between −15 °C and −25 °C, and some cold-climate models are certified lower. The minimum temperature is on each unit's spec sheet.
    How much can I save?
    Hydro-Québec says a heat pump can be up to three times more efficient than baseboards for heating in the colder months. The result depends on the house, the climate and how it is used.
    How is the LogisVert assistance calculated?
    For ENERGY STAR cold-climate certified heat pumps, Hydro-Québec lists assistance of $120 per 1,000 BTU/h of heating capacity at −8 °C. AirGreen checks the exact model before quoting an amount; only Hydro-Québec confirms the assistance granted. See the grants.
    Is it noisy?
    The sound level depends on the model and is listed in decibels on each unit's spec sheet. Location matters too: when possible, we avoid putting the outdoor unit under a bedroom window.
    The outdoor unit is covered in ice: is that normal?
    Some frost is: the unit runs defrost cycles. Never hit the ice. If the unit stays iced up or stops heating, call us.
    Does AirGreen hold the required licences?
    Yes. AirGreen holds RBQ licence 5645-9605-01, subclasses 15.8 Ventilation, 15.10 Refrigeration and 16 Electricity.
    Is the estimate free?
    Yes. The on-site estimate is free and the quote follows within 24 hours. Book my free estimate.
    Going further

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    The on-site estimate is free and the quote follows within 24 hours.

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    Text and photo: a real AirGreen Climatisation & Chauffage job. The diagrams are generic illustrations of the type of installation, not a survey of this job site. Sources of the added figures: airgreen.ca product pages (NEEP / AHRI performance), Hydro-Québec (Heat pumps page, LogisVert, read on 13 October 2026), Régie de l’énergie (rate D as of 1 April 2026).

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