Installation of a Sharp ZU1 wall-mounted heat pump in Rosemont–La Petite-Patrie (Montreal)
In Rosemont–La Petite-Patrie, AirGreen installed a Sharp Eco Inverter wall-mounted heat pump (Plasmacluster) on anti-vibration supports, with an installation designed for aesthetics, the neighborhood and the Quebec winter.
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.
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.
The refrigerant lines, the communication cable and the drain go through the wall in a single opening, sealed against water, cold air and insects.
Two insulated copper pipes connect the two units. Outside, a line cover can protect them from sun, knocks and weather.
A shut-off switch near the outdoor unit isolates it safely for service. It must stay accessible at all times.
The compressor and the fan. In heating mode it captures heat from the outdoor air, even in winter, and moves it inside.
On the ground or on the wall, it keeps the unit above accumulated snow. The unit stays clear and defrost water can drain away.
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, you often come across brick houses and duplexes where every detail counts: the aesthetics of the facade, noise in the backyard, available space, and, of course, winter performance. For this project, our AirGreen team installed aSharp wall-mounted heat pump ( Eco Inverter series, with Plasmacluster technology) to provide year-round comfort without compromising on quiet operation or durability.
The photo clearly shows the Sharp outdoor unit mounted on a solid base against a brick wall—a very typical scenario in Rosemont. The goal: a clean, stable installation, easily accessible for maintenance, and designed for Quebec's realities (snow, ice, defrost cycles, temperature variations).
Why a Sharp wall-mounted heat pump in Rosemont?
In a neighbourhood like Rosemont–La Petite-Patrie, many properties have:
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rooms in a row (living room / dining room / kitchen),
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floors where the heat rises quickly in the summer,
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winters where we want to reduce the bill without sacrificing comfort.
A Sharp wall-mounted heat pump is an excellent choice for this type of residence because it combines:
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Efficient heating in cold weather (ideal as supplementary or primary heating depending on the configuration),
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Precise air conditioning in summer, without "too cold / too hot" zones.
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Inverter (modulation): fewer consumption peaks, more stable temperature, quieter operation.
The installed system: Sharp wall-mounted heat pump (Eco Inverter) – Sharp ZU1 model
Based on the visible elements (condenser format, “Eco Inverter” markings, Plasmacluster badge, compact outdoor unit design), we are looking at a Sharp wall-mounted heat pump , consistent with the Sharp ZU1 (R-32) range, widely used in residential settings for its stability and efficiency.
Even when the exact model isn't visible in a photo, our approach at AirGreen is simple: we stay true to the manufacturer's actual product range and typical industry usage (surface area, configuration, heating/cooling requirements). The result: a product that accurately reflects the job site, without any "magical promises" or invented features.
Observable installation details: a stable, vibration-damping base and a logical layout
This installation has several visible advantages that make a real difference in the long term:
1) Outdoor unit on supports with shock absorbers (anti-vibration)
Note the sturdy supports and anti-vibration pads (blue pads). This is exactly what is needed in a residential setting:
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reduction of vibrations transmitted to the building,
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reduction of perceived noise inside,
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better protection of the unit over time (fewer micro-movements, less mechanical stress).
2) Positioning against a brick wall: stability + protection
The brick wall provides a robust surface, but best practices must be followed: clearance, air circulation, access to the panels, and defrost water management. Here, the unit is positioned to remain accessible and well-ventilated .
3) Presence of an electrical box/disconnect switch nearby
We can see a box above, which corresponds to a clean installation on the power supply side. This is important because:
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security,
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maintenance,
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compliance and future interventions.
4) Environmental management (soil, leaves, cold season)
We are in an outdoor setting where we can see leaves/natural soil near the bottom. At AirGreen, we always take the following into account:
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the accumulation of snow,
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freeze/thaw cycles,
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the evacuation of defrost water (to avoid an “ice rink” and limit ice around the unit).
Key steps (our AirGreen method) for a sustainable Sharp installation
Even though every home is different, a well-installed Sharp wall-mounted heat pump follows a consistent logic:
Location evaluation and selection
We approve:
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the required air clearances,
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the routing of the refrigeration lines (as direct and aesthetically pleasing as possible),
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the optimal location to limit noise and facilitate maintenance.
Installation of the outdoor unit
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mounting on sturdy supports
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upgrade (important for drainage and longevity),
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addition of anti-vibration dampers.
Refrigeration and electrical connections
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tight connections to the appropriate torque
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Rigorous vacuuming,
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leak test,
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stable and secure commissioning.
Functional tests
We approve:
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rising in temperature and heating,
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pressure stability,
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defrosting (under realistic conditions or via parameter checks),
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noise and vibrations.
Everyday comfort: what the customer really feels after installation
A properly sized and installed Sharp wall-mounted heat pump translates into very tangible benefits:
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Stable temperature : fewer “hot flashes / cold flashes”.
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Quick response : effective recovery after a colder night or a very hot day.
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Silence : especially when the outdoor unit is correctly placed on shock absorbers.
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Air quality : Plasmacluster technology (Sharp signature) is a plus appreciated by many families, especially during the season when the house is more closed up.
Rosemont: Typical challenges, and how to anticipate them
Noise and neighbors
In urban areas, courtyards and alleyways bring properties closer together. We favor:
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anti-vibration mounts,
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A location that avoids resonance zones,
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clean and well-secured piping system.
Quebec winter: snow, ice, de-icing
A heat pump works hard in winter. We must:
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keep the unit clear,
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plan for defrosting water,
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prevent ice from forming directly under the device.
Aesthetic
In Rosemont, appearance matters. Our goal:
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discreet , aligned, clean installation
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making the connections as "professional" as possible.
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no visible "DIY" work.
Recommended maintenance for a Sharp (and why it protects your investment)
To keep your Sharp heat pump performing well and economically:
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Filter cleaning (interior): regular, especially during air conditioning season.
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Clearance from the outdoor unit : leaves, snow, ice.
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Complete periodic maintenance : checking pressures, inspecting connections, checking the condition of supports, performance testing.
A high-performance inverter system can lose some of its efficiency if maintenance is neglected—not necessarily through breakdowns, but through fouling, poor heat exchange, disrupted drainage, etc. Preventive maintenance is often what avoids unpleasant surprises in the middle of January.
Why entrust the installation to AirGreen?
Because a heat pump isn't just "putting a box outside":
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We install with consideration for noise , aesthetics , maintenance , and winter performance .
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We work to ensure that the installation is clean , stable , and consistent with your building (brick, alley, facade, confined space).
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We prioritize quality of execution: fixing, clearances, commissioning, and finishing.
In Rosemont–La Petite-Patrie, a good installation is visible… but above all, it is felt: consistent comfort, quiet operation, and peace of mind.
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.
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.
Model, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
Floors and furniture protected, wall plate position marked level, wall opening located.
A single opening, with the slope the drain needs to flow outside.
Set on a stand raised above the snow, with the clearances the manufacturer requires.
Connected, insulated and protected. The opening is then sealed against water, cold air and insects.
A dedicated circuit and an accessible disconnect near the outdoor unit.
Leak test, vacuum, then start-up and a check of heating and cooling.
Remote, modes, filters: we show you the essentials before we leave.
- 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.
- The quoteModel, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
- Getting readyFloors and furniture protected, wall plate position marked level, wall opening located.
- The wall openingA single opening, with the slope the drain needs to flow outside.
- The outdoor unitSet on a stand raised above the snow, with the clearances the manufacturer requires.
- Lines, cable and drainConnected, insulated and protected. The opening is then sealed against water, cold air and insects.
- The electrical workA dedicated circuit and an accessible disconnect near the outdoor unit.
- Tests and start-upLeak test, vacuum, then start-up and a check of heating and cooling.
- The walkthroughRemote, modes, filters: we show you the essentials before we leave.
What the unit delivers when it is cold
The range as published on airgreen.ca: pick a size to see its capacity in deep cold.
| Size | Heating at −8 °C | Heating at −15 °C | Coldest certified point | COP at −15 °C | SEER | HSPF | Indicative LogisVert aid |
|---|---|---|---|---|---|---|---|
| Sharp ZU1 12 000 | 14,500 | 12,000 | −27 °C: 7,200 | 2.11 | 22.0 | 11.0 | $1,740 |
| Sharp ZU1 15 000 | 18,100 | 15,300 | −27 °C: 10,100 | 2.1 | 24.0 | 11.0 | $2,172 |
| Sharp ZU1 18 000 | 22,000 | 18,000 | −27 °C: 11,500 | 2.2 | 24.0 | 11.0 | $2,640 |
| Sharp ZU1 24 000 | 22,400 | 19,000 | −27 °C: 12,300 | 2.2 | 22.0 | 11.0 | $2,688 |
According to NEEP, it delivers 14,500 BTU/h at −8 °C (17 °F), more than at 8 °C (14,000 BTU/h). It heats as hard in moderate cold as in mild weather.
According to NEEP, its certified maximum capacity at −27 °C (−17 °F) is 7,200 BTU/h, 60% of its nominal 12,000 BTU size.
At 8 °C, its certified maximum capacity reaches 17,100 BTU/h, 42% more than its nominal 12,000 BTU size.
According to NEEP, it delivers 18,100 BTU/h at −8 °C (17 °F), more than at 8 °C (18,000 BTU/h). It heats as hard in moderate cold as in mild weather.
According to NEEP, its certified maximum capacity at −27 °C (−17 °F) is 10,100 BTU/h, 67% of its nominal 15,000 BTU size.
At 8 °C, its certified maximum capacity reaches 21,800 BTU/h, 45% more than its nominal 15,000 BTU size.
According to NEEP, it delivers 22,000 BTU/h at −8 °C (17 °F), more than at 8 °C (21,600 BTU/h). It heats as hard in moderate cold as in mild weather.
According to NEEP, its COP at −27 °C is 1.88: the highest of the ZU1 line, which ranges from 1.79 to 1.82 at that temperature.
According to NEEP, its certified maximum capacity at −27 °C (−17 °F) is 11,500 BTU/h, 64% of its nominal 18,000 BTU size.
At −27 °C, its certified minimum capacity is 3,200 BTU/h (5,500 at 8 °C). It slows down instead of cycling on and off.
According to NEEP, its certified heating capacity at −15 °C (5 °F) is 19,000 BTU/h, 79% of its nominal 24,000 BTU size. Its COP there is 2.20.
Data read live from the airgreen.ca page of each size (NEEP / AHRI certified performance). When the title names the installed size, it is highlighted; otherwise the whole range is shown. The aid shown is today’s, using Hydro-Québec’s rule ($120 per 1,000 BTU/h at −8 °C); amounts quoted in the article date from its publication. Only Hydro-Québec confirms the assistance granted.
And at your place?
Two quick checks with real numbers: what heat costs, and what your current heaters add up to in BTU/h.
Baseboards and electric furnaces turn 1 kWh of electricity into 1 kWh of heat. A heat pump delivers more: that is its COP. At Hydro-Québec’s rate D (11.142¢/kWh above 40 kWh a day, since 1 April 2026):
Hydro-Québec: a heat pump can be up to three times more efficient than baseboards for heating in the colder months.
Estimate per kWh of heat, at the chosen temperature, using the certified COP from the product page. Taxes, access charge and backup heat not included.
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.
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.
- Clean the filters more often when the unit runs a lot.
- Keep plants away from the outdoor unit.
- Check that no water drips from the indoor unit.
- Rake the leaves around the outdoor unit.
- Test heating before the first cold days.
- Book periodic maintenance before winter.
- Keep snow away from the stand and the front of the unit.
- Let the unit defrost: it is normal.
- Never hit the ice on the fins; call us if the unit stays iced up.
Which type of equipment for your project?
Pick what looks like your need.
Four mistakes we do not make
Flip each card to see what we do instead.
What people ask us about this kind of work
Does a wall-mounted heat pump heat in winter?
Wall-mounted or multi-zone: how do I choose?
Where does the outdoor unit go?
Are there grants?
Do I need a permit?
How cold can it heat?
How much can I save?
How is the LogisVert assistance calculated?
Is it noisy?
The outdoor unit is covered in ice: is that normal?
Does AirGreen hold the required licences?
Is the estimate free?
No question matches. Write to us: we answer.
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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).