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Installation of a Sharp wall-mounted heat pump in Saint-Laurent

Installation of a Sharp wall-mounted heat pump in Saint-Laurent by AirGreen: four-season comfort, energy efficiency and HVAC installation adapted to tight spaces.

By AirGreen Climatisation & Chauffage Admin3 min read
Installation of a Sharp wall-mounted heat pump in Saint-Laurent
Installation of a Sharp wall-mounted heat pump in Saint-Laurent
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.

A comfort project adapted to a limited space

At AirGreen , we recently installed a Sharp wall-mounted heat pump in a home located in Saint-Laurent , a dynamic residential area of ​​Montreal. This project perfectly illustrates our expertise in HVAC installation in tight spaces, while respecting energy performance and safety standards.

Client context and needs

The owner of this home was looking for an effective solution to ensure optimal comfort in both summer and winter . With limited space, a compact wall-mounted heat pump was the ideal option. Choosing a Sharp unit, known for its reliability and stable performance even during Montreal winters, perfectly met their expectations: economical heating and efficient air conditioning, all in a discreet format.

Features of the installation

The installation took place in a narrow technical space adjacent to a wall cabinet. A few key elements of the project:

  • Strategic positioning of the wall head above the storage space, ensuring optimal air diffusion in the room.

  • Routing of refrigerant pipes through an existing opening in the lower part of the wall, limiting additional drilling.

  • Installation of adequate insulation of lines to prevent any loss of energy efficiency.

  • Verification of gravity condensate management , adapted to the interior configuration.

Challenges encountered and solutions provided

Installing a wall-mounted heat pump in such a small space required great precision. The main constraints were related to:

  1. Near the partitions : the space between the interior head and the walls had to be at a minimum to ensure unobstructed airflow.
    → Solution: millimetric adjustment of the installation and optimization of the orientation of the air deflector.

  2. Limited access for passing lines : the lower technical hatch offered little room for maneuver.
    → Solution: use of specialized tools to guide the pipes and reduce the number of bends, thus minimizing the loss of refrigeration charge.

Customer Benefits

Thanks to this installation, the owner now benefits from:

  • Four-season comfort thanks to a high-performance, quiet wall-mounted heat pump.

  • A reduction in its energy consumption , compared to a conventional electric heating system.

  • Equipment eligible for grant programs available in Montreal, Laval, Longueuil, on the North Shore and the South Shore, due to the seasonal performance of the Sharp range.

AirGreen expertise in Saint-Laurent

This project demonstrates our ability to adapt our installation methods to the architectural features of Saint-Laurent homes. Whether condos, townhouses, or older dwellings, we always prioritize:

  • Personalized planning ,

  • Qualified technicians with expertise in leading brands such as Sharp, Fujitsu, Gree, Midea, Panasonic and others,

  • And comprehensive support including advice on subsidies and preventative maintenance.

Maintenance and sustainability

We remind our customers that regular maintenance is essential to maintaining the performance of their wall-mounted heat pump. At AirGreen, we offer complete HVAC maintenance services, including filter cleaning, refrigeration circuit testing, and condensate drain inspections. These services help extend the life of your units and ensure optimal efficiency, even in extremely cold weather.

Conclusion

With this Sharp wall-mounted heat pump installation in Saint-Laurent , the client benefits from a high-performance system, adapted to their space and meeting current energy efficiency standards. This type of project demonstrates the value of entrusting your HVAC work to an experienced and rigorous team like AirGreen.

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

    Useful pages for what comes next

    GrantsAssistance programs in effectAirGreen checks your model before quoting an amount.PermitsYour city’s rulesLocation, distances, noise: what changes from city to city.InstallationOur installation serviceGreater Montréal and Montérégie.

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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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