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Installation of a Fujitsu wall-mounted heat pump in Ville-Marie (Montreal)

AirGreen has installed a Fujitsu wall-mounted heat pump in Ville-Marie (Montreal): a discreet, quiet and efficient solution for air conditioning in the summer and improving heating comfort during the cold seasons.

By AirGreen Climatisation & Chauffage Admin4 min read
Installation of a Fujitsu wall-mounted heat pump in Ville-Marie (Montreal)
Installation of a Fujitsu wall-mounted heat pump in Ville-Marie (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 many condos and apartments in Ville-Marie , comfort often hinges on one detail: efficient air conditioning in the summer and a reliable heat pump when temperatures drop. For this project, our AirGreen team installed a Fujitsu wall-mounted heat pump (mini-split) to provide precise temperature control, excellent energy efficiency, and quiet operation—all with a clean and discreet integration.

A logical choice for an urban interior: the Fujitsu wall-mounted heat pump

The photo clearly shows a wall-mounted indoor unit installed high up, near the ceiling: this is the typical configuration of a wall-mounted heat pump (mini-split) . This type of system is particularly well-suited to the conditions in Montreal.

  • open-plan rooms or closed bedrooms

  • buildings where major work (ducts, ceilings to be opened, etc.) is to be avoided

  • need for air conditioning in summer and efficient heating in the mid-seasons (and even in winter depending on the range)

Here, the brand to respect is Fujitsu , and the visible unit corresponds very well to the Fujitsu AIRSTAGE signature. For consistency within the product range, we recommend a recent residential model such as the Fujitsu Altair 300 (KNAS – R-32) (or equivalent AIRSTAGE), known for its comfort and stability.

What the installation reveals (salient details)

Even with a photo focused on the inner head, several concrete elements of a well-executed installation can be deduced:

  • Positioning at a height or in a corner : excellent for air diffusion, especially in a living room, while limiting the visual impact.

  • Clearances respected : the unit is placed close to the ceiling, but with the necessary space for air intake and maintenance.

  • Minimalist integration : the installation is clean, perfectly aligned, and designed to blend into a modern setting (typical of central sectors).

  • Large air outlet flap : useful for distributing air further and improving comfort, both in air conditioning and heating.

At AirGreen, we always emphasize this point: a wall-mounted heat pump truly performs when the location and quality of the connections (drain, refrigerant lines, sealing, vacuuming, testing) are impeccable. This is what makes the difference between "it works" and "it works perfectly, for a long time."

Why Fujitsu is particularly popular in Montreal

In Montreal's residential market, Fujitsu is a brand that comes up frequently for three very simple reasons:

  1. Stable comfort : the inverter modulates the power instead of constantly switching on and off. Result: fewer temperature fluctuations.

  2. Silence : in a condo or semi-detached house, this is a major criterion (especially at night).

  3. Efficiency : a good wall-mounted heat pump reduces costs compared to direct electric heating, particularly during "mild" periods (autumn/spring) and part of the winter depending on the model.

An installation designed for real life (and for Quebec winters)

In Ville-Marie, needs are rarely “standard”. We often see:

  • rooms that overheat quickly in the sun (large windows, southwest orientation)

  • significant differences between rooms (kitchen/living room vs bedroom)

  • a need for air conditioning early in the spring and sometimes late in the fall

With a properly sized Fujitsu wall-mounted heat pump, you get:

  • comfortable air conditioning without harsh drafts

  • efficient heating in mid-season (and longer, depending on the series)

  • improved indoor air quality thanks to integrated filtration (and simplified maintenance if access is properly provided)

At AirGreen, we also take the time to explain to the customer the settings that make all the difference: direction of the fins, ventilation speed, dehumidification mode, and above all the good habits that maximize efficiency (and avoid overconsumption).

Our AirGreen approach: careful installation, real performance, clean results

A wall-mounted heat pump is an investment. Our job is to ensure you get the promised comfort , not just a machine attached to the wall.

Specifically, during an installation like this, we pay particular attention to:

  • the height and orientation of the unit for even diffusion

  • the routing of the connections and the condensation drain (clean, reliable, durable)

  • Vacuuming and leak testing (essential for longevity)

  • vibration and noise reduction

  • the clarity of the explanations to the customer (use, maintenance, correct settings)

Conclusion

This installation in Ville-Marie illustrates exactly what we like to deliver: a Fujitsu wall-mounted heat pump that is neatly integrated, intelligently placed, and designed to offer everyday comfort — both as air conditioning in the summer and as supplementary and mid-season heating, in the real Montreal context.

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

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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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