Installation of a SHARP ZU1 18,000 BTU Wall-Mounted Heat Pump in Nuns' Island
Professional installation of a SHARP ZU1 18,000 BTU wall-mounted heat pump in Nuns' Island. AirGreen delivers energy-efficient, quiet, and subsidized performance with an exemplary aesthetic finish.
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 high-end comfort solution for a condo on Nuns' Island, by AirGreen
Nestled between peaceful greenery and panoramic views of the river, Nuns' Island is a place where thermal comfort should never be compromised. It is precisely in this refined residential context that our team at AirGreen recently completed the installation of a SHARP ZU1 18,000 BTU wall-mounted heat pump , a high-performance model that combines energy efficiency, climatic comfort, and discreet aesthetics.
A perfectly mastered logistical challenge
From the site analysis, we were faced with several technical elements: complex access at height, a demanding brick facade for fixing the wall support, and the need to preserve the visual integrity of the co-ownership. To meet these requirements, we used a secure lifting platform , protected the anchor points with anti-vibration material, and carefully concealed the refrigeration piping under a high-quality aesthetic cover .
The client, owner of a large two-story condo, was looking for a reliable heating and cooling solution to ensure comfort all year round, even in the middle of Montreal's winter. After a comparative analysis of several options, the SHARP ZU1 , with its heating capacity down to -27°C , emerged as the best solution.
Technical characteristics of the installed SHARP ZU1 model
-
Brand : SHARP
-
Model : ZU1 (2024)
-
Outdoor unit number : AE-X18ZU1
-
Indoor unit number : AY-XP18ZU1
-
Power : 18,000 BTU
-
Refrigerant : R-32 (ecological and efficient)
-
Certifications : ENERGY STAR® & ENERGY STAR® for Cold Climate
-
SEER2 : 24.0
-
HSPF2 : 10.0
-
EER2 : 13.0
-
Built-in WiFi : Yes
-
Noise level (outdoor/indoor) : 52 dB / 25-49 dB
-
Voltage : 220V
-
External dimensions : 33.47 x 13 x 27.94
-
Eligible LogisVert grant : $2,640
Concrete benefits for our client on Île-des-Sœurs
Exceptional energy performance
With a SEER2 of 24 and an HSPF2 of 10 , this system ensures low electricity consumption while maintaining a stable and comfortable temperature. Ideal performance for long periods of cold on the South Shore of Montreal .
Ultra-quiet operation
Thanks to extremely low noise levels, the unit does not disturb the customer's indoor life or the outdoor environment, an essential criterion in co-ownership .
Smart remote control
The customer can now manage their system via a mobile application , schedule heating or cooling cycles, and optimize their energy savings even on the go.
Compact and aesthetic design
Installed near the balcony, the wall unit blends perfectly into the gray brick architecture of the building. The cable routing was concealed with custom-made conduit covers , installed horizontally under the balcony for a professional finish.
A trustworthy AirGreen service
Quick and hassle-free installation
The entire job was completed in a single day , despite the restricted access and the need to lift the equipment precisely using a cherry picker. Our certified technicians handled all electrical connections, pressure tests, and commissioning , ensuring optimal results the first time.
Maximized subsidies
AirGreen assisted the client in validating their eligibility for the LogisVert grant . Thanks to the SHARP ZU1 model and our RBQ certification, the $2,640 grant application was activated immediately after installation.
Zero deposit, 100% satisfaction
As with all our installations, the customer only paid at the end of the project , after complete verification of operation and satisfaction.
Customer Testimonial
“I am extremely satisfied with the installation by AirGreen. The SHARP system is quiet, efficient, and the team was professional from start to finish. Access was difficult, but they took care of everything, even the aesthetic details. Thank you!”
– Client, Nuns’ Island
Why choose AirGreen for your wall-mounted heat pump in Montreal or the surrounding area?
At AirGreen, we combine technical expertise , exceptional customer service , and in-depth knowledge of local grants and standards . Whether you live in Montreal, Laval, Longueuil, the North Shore, or the South Shore , we offer a turnkey service for the installation of energy-efficient HVAC systems, such as the SHARP ZU1 18,000 BTU heat pump .
Our commitments:
-
No surprises, final quote before work
-
No deposit required, payment upon full satisfaction
-
Personalized advice to choose the right system
-
Full 10-10-10 warranty: parts, compressor, labor
Conclusion
The installation of this SHARP ZU1 wall-mounted heat pump in Île-des-Sœurs once again demonstrates AirGreen's ability to deliver technical projects with professionalism, efficiency and aesthetics. Thanks to this innovative model, our client now benefits from exceptional thermal comfort , in all seasons, and a profitable long-term investment.
Want to benefit from a high-performance system like this in your home or building? Contact AirGreen today for a free estimate .
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.
More jobs to see, near you
By town, by equipment or by region: browse more than 4,700 published projects.
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).