Job sheet · Project

Installation of a Sharp wall-mounted heat pump in Chomedey, Laval

In Chomedey, our team installed a Sharp ZU1 wall-mounted heat pump in a low-ceilinged basement, transforming the room into a comfortable space year-round. Discreet, quiet, and energy-efficient, this AirGreen solution improves quality of life while reducing energy costs.

By AirGreen Climatisation & Chauffage Admin5 min read
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In Chomedey, a typical residential area of ​​Laval, a homeowner wanted to make his basement much more comfortable, both in the middle of July and in January. He chose to trust our team to install aSharp wall-mounted heat pump , a perfect solution for rooms with lower ceilings and specific comfort needs.

A basement transformed thanks to a Sharp wall-mounted heat pump

The room we air-conditioned and heated is a finished basement : low ceiling, high window overlooking the outside, and walls painted in a pale green. It's a very typical Laval home, often used as a family room, office, or playroom.

To meet the client's needs, we installed a Sharp ZU1 12,000 BTU wall-mounted heat pump :

  • Power perfectly suited to a large basement room;

  • ECO Inverter technology allowing continuous power adjustment;

  • Efficient heating to cope with Laval's winters;

  • Efficient and quiet air conditioning in summer.

This new generation Sharp model offers an excellent compromise between performance, sound comfort and energy efficiency.

Optimal positioning of the Sharp wall-mounted head

The photo clearly shows the Sharp wall-mounted unit installed at the very top of the wall, just below the ceiling and near the window. This positioning is not accidental: it was chosen to maximize airflow in the room.

Our technical choices:

  • Installation at a height , as close as possible to the ceiling, to allow warm air to descend evenly in winter and fresh air to be better distributed in summer;

  • Positioning on an exterior wall , directly connected to the outdoor compressor, which minimizes the length of refrigerant lines and heat losses;

  • Orient the air outlet towards the center of the room to avoid direct drafts on the occupants;

  • Harmonious integration on a clear wall, without furniture or obstacles in front of the unit.

The result: consistent comfort throughout the basement, without "cold zones" and without blowing directly on the occupants.

Acoustic comfort and refined aesthetics

Basements are often used for relaxation or teleworking; therefore, noise becomes an important factor in the selection process. The Sharp wall-mounted heat pump installed in Chomedey offers:

  • Very quiet operation in ventilation or air conditioning mode;

  • A reduced noise level in night mode, ideal when the basement is used as a bedroom;

  • Gentle ventilation, without excessive turbulence.

Aesthetically, the wall unit blends perfectly into the room:

  • Simple and modern design, in white color;

  • Precise alignment under the ceiling, for a clean visual result;

  • No visible wires, the connections are entirely concealed within the partition and to the outside.

The overall effect is one of professional finish, as if the heat pump had always been part of the room's original design.

An installation designed for Laval winters

Although the photo shows the indoor unit, the entire system design takes into account the climatic conditions of Greater Montreal . The Sharp ZU1 wall-mounted heat pump was sized and configured for:

  • To ensure stable heating even during intense cold;

  • Reduce reliance on electric baseboard heaters or other energy-intensive backup systems;

  • To deliver high performance while maintaining controlled energy consumption.

For this project in Chomedey, we have:

  • Checked the basement insulation and the presence of sources of heat loss;

  • Adjusted the heat pump parameters (defrost curves, minimum operating temperature, etc.);

  • Sufficient clearance has been provided outside so that the Sharp compressor can operate efficiently, even in the presence of snow.

The customer now benefits from reliable and economical heating , particularly appreciated during long winter evenings.

Humidity management and air quality

Basements can be more humid than other floors of a house. Installing this Sharp wall-mounted heat pump in Chomedey offers several additional advantages:

  • Dehumidification mode which reduces relative humidity and improves comfort;

  • Air filtration, helping to reduce dust and particles;

  • Constant air renewal in the room, avoiding feelings of heaviness or stale air.

Combined with good management of overall home ventilation, the heat pump becomes a key element in maintaining optimal indoor air quality .

A profitable investment for the home

By choosing a Sharp wall-mounted heat pump, the owner of this house in Chomedey benefits from:

  • An increase in comfort in a space that was previously more difficult to heat or cool;

  • Reduced electricity bills , thanks to the superior efficiency of inverter technology;

  • Adding value to the property , a modern heating and air conditioning system is highly sought after in the real estate market.

The heat pump thus becomes not only a tool for everyday comfort, but also a smart investment for the home.

AirGreen: Your Sharp heat pump specialist in Laval and Greater Montreal

At AirGreen, we support homeowners in Laval, Montreal, the North Shore, and the South Shore with their residential comfort projects. Our approach:

  • Detailed analysis of your needs, room by room;

  • Recommendation of the correct capacity (BTU) and the correct Sharp model;

  • Professional, clean and safe installation, both indoors and outdoors;

  • Support for energy efficiency grants and programs when available;

  • Reliable after-sales service for maintenance, cleaning and repairs.

Whether you want to air condition a basement, a living room, several bedrooms or your entire house, our team is here to offer you the Sharp solution best suited to your situation.

Your numbers

The job tools

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.

    The steps

    How the job unfolds

    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.
    The tour

    What we check on a job like this one

    Each number is a point we check on site. Switch between summer and winter to watch air and heat move.

    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.

    At your place

    Is your home ready?

    Check what applies at your place. A "no" is not a refusal: it is what we sort out during the estimate.

    0 / 6 checked
    Maintenance

    Good habits, once the unit is in place

    Six simple habits that keep the unit going. Your list stays on this device.

    0 / 6 checked
    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.
    For your project

    The right pages, at the right time

    True or false

    Four statements: true or false?

    It all comes down to details you have just seen.

    1. In heating mode, the outdoor unit can produce water.

    2. You pick the capacity with a simple square-footage rule.

    3. A multi-zone connects several indoor heads to a single condenser.

    4. The disconnect can sit behind the patio furniture.

    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.

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    An on-site estimate, the right capacity, the right equipment.

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

    • RBQ licence5645-9605-01 · 15.8, 15.10, 16
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    • 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).

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