Wall-mounted SHARP ZU1 12,000 BTU Heat Pump Installation in Saint-Constant – Year-Round Comfort in the Heart of the South Shore
AirGreen installed a SHARP ZU1 12,000 BTU wall-mounted heat pump in Saint-Constant. -27°C performance, Plasmacluster technology, R32 refrigerant, and a clean balcony installation.
Take a tour of the installation
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.
A wall-mounted heat pump installation designed to maximize energy performance and comfort in a condo
At AirGreen, we recently completed the installation of a SHARP ZU1 12,000 BTU wall-mounted heat pump in a condominium unit in Saint-Constant, on the South Shore of Montreal. This project perfectly illustrates our expertise in residential HVAC installations on enclosed balconies, a setting that demands precision, discretion, and efficiency.
The outdoor unit was carefully installed on a raised wall bracket, optimizing space without obstructing movement on the balcony. All refrigerant, electrical, and drainage lines were discreetly routed through a clean line set cover that runs along the façade. This type of installation is not only visually seamless, but also complies with condo association standards for noise and cleanliness.
Why choose the SHARP ZU1 12,000 BTU wall-mounted heat pump?
The SHARP ZU1 series is a benchmark in compact heat pumps built for cold northern climates. The model AY-XPC12ZU / AE-X12ZU1, installed in Saint-Constant, is equipped with the latest technology to provide year-round heating and cooling, even during the harsh Québec winters.
Key technical specifications:
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Cooling capacity: 12,000 BTU/h (min-max: 2,800 - 13,600 BTU/h)
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Heating capacity: 14,000 BTU/h (min-max: 3,200 - 17,100 BTU/h)
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Performance in extreme cold: 7,200 BTU/h at -27°C
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SEER / SEER2: 21 / 22 — top-tier energy efficiency
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R32 refrigerant: eco-friendly, low GWP, high efficiency
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Plasmacluster technology: purifies indoor air by eliminating bacteria, viruses, allergens, and mold
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Built-in Wi-Fi control: manage settings remotely via mobile app
Unique context of this installation: a protected condo balcony
In Saint-Constant, the unit was installed on a covered balcony, exposed to seasonal temperature fluctuations, but protected from direct weather. This provides added protection for the outdoor unit while ensuring proper condensate drainage thanks to SHARP’s advanced defrosting and piping systems.
The AirGreen team:
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Mounted the wall bracket using galvanized steel supports suited to the space constraints
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Ran refrigerant and electrical lines inside a rigid white wall-mounted line cover that blends seamlessly with the exterior
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Insulated all piping with high-performance materials to prevent energy loss
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Verified the unit’s acoustic levels to ensure it meets condo noise regulations
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Provided the client with a full tutorial on using the SHARP mobile app and tips for routine maintenance
The exclusive benefits of SHARP’s Plasmacluster technology
SHARP’s Plasmacluster technology doesn’t just heat or cool — it actively purifies the air in your home.
It effectively combats:
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Airborne viruses and bacteria
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Adherent mold on walls and ceilings
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Common household allergens (dust, dust mites)
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Lingering odors, like cooking smells or tobacco smoke
Using a unique system of positive and negative ions, it replicates the natural purification processes found in mountain air — without the use of chemicals or artificial fragrances.
A system that perfectly fits the needs of condo families
The client in Saint-Constant reached out to us to replace an old auxiliary system that no longer met their comfort needs. The challenge was to offer a solution that was discreet, high-performing, and compatible with both the physical and administrative requirements of the condo board.
Our experts were able to:
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Secure condo board approval by providing full technical specs and certified noise levels
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Propose a clean, aesthetic installation design that respected the building’s visual harmony
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Complete the installation in a single day, including full system testing, calibration, and purging
Eligibility for grants
Although Hydro-Québec’s LogisVert grants generally target heat pumps with an HSPF rating of 10 or higher, this model achieves an HSPF of 12.5 (Zone IV) and could qualify depending on the home’s configuration and current program rules. AirGreen always helps clients verify their eligibility and submit their applications.
Why choose AirGreen for your wall-mounted heat pump installation?
For over a decade, AirGreen has been the go-to expert for wall-mounted heat pump installations in Montreal, Laval, Longueuil, the South Shore, and the North Shore. Our commitment includes:
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Recognized technical expertise
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Personalized service tailored to residential and multi-unit contexts
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Clean, code-compliant installations
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Help with paperwork (grants, warranties, maintenance)
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A certified team trained on all SHARP products
Conclusion: A smart, economical, and long-lasting choice
The SHARP ZU1 wall-mounted heat pump installed in Saint-Constant offers the homeowner superior air quality, optimized energy performance, and reliable operation down to -27°C. Thanks to the professional installation by our team, the client enjoys year-round comfort, fully aligned with the condo board’s standards.
This project is a perfect reflection of our mission at AirGreen: to deliver innovative, efficient HVAC solutions that seamlessly fit our clients’ everyday lives on the South Shore.
The unit on this job, in figures
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 big day, step by step
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 would it look like 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.
Four mistakes we do not make
Flip each card to see what we do instead.
Your own project, step by step
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.
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.
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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Each dot: a town where AirGreen has published projects. The glowing dot: this job.
Every house has its constraints. We see them before we install.
The on-site estimate is free and the quote follows within 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).