Project

Installation of a Sharp wall-mounted heat pump in Sainte-Dorothée (Laval): a clean, quiet exterior, ready for winter

In Sainte-Dorothée (Laval), AirGreen installed a Sharp wall-mounted heat pump with an impeccable exterior finish: wall brackets, vertical duct covers, clean electrical routing, and appropriate clearances. A concrete example of an installation designed for Greater Montreal's winters.

By AirGreen Climatisation & Chauffage Admin5 min read
Installation of a Sharp wall-mounted heat pump in Sainte-Dorothée (Laval): a clean, quiet exterior, ready for winter
Installation of a Sharp wall-mounted heat pump in Sainte-Dorothée (Laval): a clean, quiet exterior, ready for winter
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 Sainte-Dorothée, Laval, you often find single-family homes and apartment buildings with pale brick exteriors, exposed foundations, and simple landscaping—exactly the type of setting your photo shows. In this kind of environment, a wall-mounted heat pump must meet three very specific requirements: be efficient , remain discreet , and withstand Quebec conditions (frost, snow, defrost cycles, humidity).

At AirGreen , we have just completed a Sharp installation that perfectly illustrates these priorities: a "clean" outdoor unit, securely fixed, with a neat finish on the ducts and a positioning designed for long-term reliability.


Machine type: wall-mounted heat pump (mini-split)

The photo clearly shows the outdoor unit of a wall-mounted heat pump (mini-split) . This is the most popular residential solution in Greater Montreal when you want to:

  • to effectively air-condition in summer (even in humid periods),

  • to heat a large part of the year at a reduced cost,

  • avoid major pipework,

  • to keep a simple, quiet and modulating system.


Brand: Sharp (confirmed)

The brand supplied manually is Sharp — and it corresponds to what can be seen on the outdoor unit: SHARP logo, mention ECO INVERTER and the Plasmacluster Ion emblem.


Model (consistent with the Sharp range)

Without a legible nameplate in this view, the most logical choice (and very common in residential Sharp) is a Sharp ZU1 (R-32) wall-mounted heat pump , available in several capacities (12,000 to 24,000 BTU depending on the needs).

At AirGreen, the exact BTU is always decided according to the area, sunlight, insulation, number of floors and occupancy habits — but in Sainte-Dorothée, 12,000 to 18,000 BTU sizes are very frequently installed for main areas, or 18,000 to 24,000 BTU when aiming for greater coverage.


What we notice about the installation (salient details)

This photo is interesting because it shows several good practices that are "invisible" to the customer, but essential for sustainability.

1) Outdoor unit on wall brackets: practical and smart

The unit is mounted on wall brackets , raised off the floor. In Laval, this is often an excellent choice.

  • The unit is protected against snow accumulation and splashes.

  • It makes cleaning around the device easier.

  • This reduces the risk of ice or standing water interfering with defrosting.

2) Vibration reduction: stability and silence

We can distinguish an installation designed to limit vibrations (supports and points of contact). When done well, this translates into:

  • less resonance in the structure,

  • a quieter experience indoors,

  • reduced mechanical wear over time.

3) Neat finishing of the connections: vertical duct cover + clean routing

The vertical duct cover (line set cover) is a very telling detail of a professional installation:

  • It protects refrigerant lines and wiring against UV rays and weathering.

  • It significantly improves the aesthetics (especially on light brick).

  • It makes future maintenance easier and keeps the wall clean.

We also see a well-aligned surface electrical conduit : it's simple, clean, and in line with a sustainable approach.

4) Unity releases and breathing

The unit is positioned to maintain a breathing space in front of the grille. This is crucial for:

  • preserve efficiency (incoming/outgoing air),

  • avoid the recirculation of cold air in winter,

  • reduce stress on the compressor during peak periods.


Why this Sharp installation is particularly well-suited to Laval

In Sainte-Dorothée, people often look for a system that "does it all": comfortable air conditioning in the summer, efficient heating in the shoulder seasons, and good performance in the winter. A Sharp wall-mounted heat pump (ZU1 series, for example) perfectly meets this need thanks to:

  • Inverter technology (precise modulation, fewer on/off cycles),

  • stable and economical operation

  • an approach focused on comfort (more constant temperature),

  • and, depending on the configuration, air quality features highlighted by Sharp (including Plasmacluster).


Our AirGreen approach: an installation that remains beautiful… and reliable 10 years later

In this type of residential project, we always emphasize four points:

  • Positioning : not just "where it fits", but where it works best (ventilation, snow, access).

  • Fixing and anti-vibration : because comfort also means silence.

  • Exterior finish : conduit covers, clean routing, component protection.

  • Winter preparation : clearance, water management, defrosting logic and longevity.

This is exactly what this Sharp installation reflects: a clean, logical result, made for the climate of Greater Montreal.


Something to keep in mind for your own project (before choosing the location)

Even though a wall-mounted heat pump may seem simple, the details make all the difference. Common mistakes we avoid at AirGreen:

  • unit too low (snow/ice, declining yield),

  • exposed connections (UV, aesthetics, damage),

  • Insufficient clearance in front of the gate.

  • Undersized or poorly fixed supports (vibrations, noise),

  • improvised electric course.


Conclusion: a properly installed Sharp car offers effortless comfort.

This installation in Sainte-Dorothée (Laval) demonstrates what we love to deliver at AirGreen: a carefully installed Sharp heat pump, appropriate wall brackets, clean ductwork, well-integrated power supply—and above all, a configuration designed for all four seasons . The result: a system that is discreet day-to-day, performs well when it matters, and is reliable year after year.

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

    Could this job help a neighbour?

    Share
    Similar projects

    More jobs to see, near you

    By town, by equipment or by region: browse more than 4,700 published projects.

    Each dot: a town where AirGreen has published projects. The glowing dot: this job.

    All our projects

    Your project

    Tell us about your house. We come and see it for free.

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

    • RBQ licence5645-9605-01 · 15.8, 15.10, 16
    • EstimateOn site, free
    • QuoteWithin 24 hours

    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).

    Leave a comment