Installation of a Sharp ZU1 wall-mounted heat pump in Plateau-Mont-Royal (Montreal)
AirGreen installs a Sharp ZU1 wall-mounted heat pump in Plateau-Mont-Royal. A powerful and discreet HVAC solution, ideal for four-season comfort in Montreal and the surrounding area.
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The job on one screen
The unit’s data sheet
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.
The article, chapter by chapter
An elegant and efficient installation by AirGreen in the heart of the Plateau
At AirGreen , we recently had the pleasure of installing a Sharp ZU1 wall-mounted heat pump in a charming condo in Plateau-Mont-Royal , one of Montreal's most iconic neighborhoods. This project perfectly illustrates our approach: providing optimal comfort while respecting the aesthetics and technical constraints specific to downtown urban housing .
The challenge: combining performance, discretion and energy efficiency
In Plateau apartments, every square meter counts. Walls are sometimes load-bearing, ceilings are high, and insulation varies depending on the building. For this client, our goal was clear: install a wall-mounted heat pump capable of providing four-season comfort without compromising space or disrupting the visual harmony of the home.
The Sharp ZU1 has established itself as the ideal choice thanks to:
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Its high energy efficiency , down to −25°C, is perfect for Montreal winters.
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Its discreet design , with clean lines and a white finish that blends perfectly into the interior environment.
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Its minimal noise level , ensuring optimal acoustic comfort in a living room.
The precise course of the installation
1. Preparation and technical identification
Our technicians first conducted a thermal and structural analysis of the room: wall orientation, optimal positioning for air diffusion, proximity to the exterior outlet and the electrical panel. The client wanted an installation without visible ducts or perceptible noise—a challenge we often face in older apartments on the Plateau.
2. Installing the Sharp ZU1 inner head
The wall head was fixed at a strategic height of approximately 2.2 meters , ensuring even air circulation without direct drafts on the occupants. The mounting plate was carefully anchored to a load-bearing wall to ensure stability and durability.
3. Passage of refrigerant connections
The insulated copper pipes were routed through a clean and precise drilling , with a slight gravitational angle for natural drainage of condensate. We opted for a discreet white capping that blends harmoniously into the wall.
4. Electrical connection and calibration
The electrical wiring was connected to a dedicated circuit breaker to maximize safety and RBQ compliance. After pressure and vacuum testing, our technicians calibrated the airflow and temperature to ensure the Sharp ZU1's optimal performance.
A result that lives up to expectations
The owner now benefits from stable thermal comfort throughout the year, a quiet and energy-efficient system , and a design integrated into its interior . The Sharp ZU1 heat pump , compatible with R-32 refrigerant, also allows it to be eligible for certain energy subsidies offered in Greater Montreal for high-efficiency appliances.
In winter, the system maintains a gentle, constant heat, even in extreme cold. In summer, it provides fast, even cooling, while consuming up to 40% less energy than a traditional wall-mounted air conditioner.
Why choose AirGreen for your wall-mounted heat pump installation in Montreal?
Installing a heat pump in a condo in the Plateau-Mont-Royal region requires technical expertise and architectural sensitivity . At AirGreen, we combine these two strengths:
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RBQ certified technicians trained on new generations of refrigerants (R-32 and R-454B).
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Respect for living spaces : no visible conduits, impeccable finishes, maximum discretion.
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Energy optimization : each installation is calibrated to offer the best possible efficiency according to the configuration of the accommodation.
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Comprehensive support : advice on subsidies, annual maintenance and extended warranties.
A model installation in an emblematic district
The Plateau-Mont-Royal is a unique living environment where architectural heritage and modernity coexist. Our work in this area requires precise expertise : preserving the integrity of the old walls, respecting co-ownership rules, and integrating modern amenities without altering the character of the premises.
This Sharp ZU1 installation demonstrates how a well-designed HVAC solution can harmonize with a demanding urban environment , while providing unparalleled comfort.
Maintenance, a guarantee of lasting performance
Like all high-end heat pumps, the Sharp ZU1 requires annual preventative maintenance to maintain its performance:
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Cleaning the filters and turbine.
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Checking the refrigeration pressure .
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Inspection of wiring and drainage .
Our teams provide comprehensive HVAC maintenance services in Montreal, Laval, Longueuil, the North Shore, and the South Shore—guaranteeing extended durability and consistent efficiency year after year.
Conclusion
This installation of a Sharp ZU1 wall-mounted heat pump in Plateau-Mont-Royal perfectly illustrates AirGreen's mission: to offer sustainable, aesthetic and energy-efficient HVAC solutions , adapted to the reality of each home.
If you're considering upgrading your heating and cooling system in Montreal or the surrounding area, trust AirGreen — the specialist in wall-mounted and central heat pump installations in Greater Montreal .
AirGreen: your comfort, our expertise.
The job tools
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.
How the job unfolds
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 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.
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.
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.
Good habits, once the unit is in place
Six simple habits that keep the unit going. Your list stays on this device.
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.
The right pages, at the right time
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.
During defrost cycles. That water must drain away without forming ice.
2. You pick the capacity with a simple square-footage rule.
Windows, insulation, orientation and how the room is used all count. Capacity is chosen on site.
3. A multi-zone connects several indoor heads to a single condenser.
One head per room, all on the same condenser. Each room keeps its own temperature.
4. The disconnect can sit behind the patio furniture.
It must stay accessible: it is what shuts the unit off for service.
0 / 4 right answers
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).