Installation of a Sharp ZU1 18,000 BTU Wall-Mounted Heat Pump in Westmount
Discover the Sharp ZU1, the top choice for reliable, energy-efficient heating and cooling in Quebec’s harsh winters. Installed expertly in Westmount by AirGreen!
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.
The Ultimate Home Comfort Upgrade in Westmount
In the heart of Westmount, where modern living meets Quebec’s demanding weather, we recently completed the installation of a Sharp ZU1 18,000 BTU wall-mounted heat pump. At AirGreen, we take immense pride in offering top-tier HVAC solutions that blend innovation, energy efficiency, and environmental responsibility. This latest project is a shining example of our expertise, showcasing not only the performance of the cutting-edge Sharp ZU1 mini split but also why we remain the go-to HVAC specialists across Montreal, Laval, Longueuil, Rive Nord, and Rive Sud.
Why Westmount Homeowners Choose the Sharp ZU1
As the seasons change and temperatures swing between extremes, reliable home heating and cooling are non-negotiable. The Sharp ZU1 system stands out as a leader among mini split heat pumps thanks to its unmatched energy efficiency, advanced air purification technology, and capacity to operate seamlessly in temperatures as low as -27°C. Let’s dive into the details of what makes this model the perfect choice for homeowners in Westmount.
Key Highlights of the Sharp ZU1 Wall-Mounted Heat Pump
1. Unparalleled Performance
- Cooling Capacity: 18,000 BTU
- Heating Capability: Functions perfectly at temperatures as low as -27°C, ideal for Montreal’s harsh winters.
- Efficiency: A remarkable 24.0 SEER rating ensures you save big on energy bills.
2. LogisVert Grant Eligibility – $2,640
The Sharp ZU1 qualifies for the highest possible grant offered in Quebec for an 18,000 BTU heat pump under Hydro-Québec's LogisVert program. This grant not only reduces installation costs but also reflects the machine's incredible energy efficiency.
3. Environmentally Conscious – R-32 Refrigerant
Unlike older refrigerants, R-32 offers a reduced global warming potential (GWP), ensuring you enjoy superior performance while contributing to a greener planet.
4. Plasmacluster Technology – Superior Air Purification
Sharp’s exclusive Plasmacluster technology takes air purification to the next level by:
- Eliminating airborne viruses, mold, and allergens
- Neutralizing odors (like tobacco or pet smells)
- Maintaining a healthier living environment
The Installation Story – A Perfect Fit for Westmount Living
Our client, a homeowner in Westmount, reached out to us to upgrade their aging HVAC system. Their home, an elegant mix of classic architecture and modern interiors, demanded a solution that combined efficiency, aesthetics, and reliability. The challenge? Finding a wall-mounted heat pump that could operate reliably in Quebec’s extreme cold while enhancing indoor comfort without compromising energy efficiency.
Enter the Sharp ZU1. Its sleek, modern design complemented the aesthetics of the home, while its Coanda airflow control ensured even distribution of heat and cool air across every room. The homeowner was also impressed by the WiFi connectivity and real-time monitoring features, offering total control from their smartphone.
During the installation, our certified AirGreen technicians took extra care to ensure every step adhered to industry best practices. From mounting the indoor unit to securing the exterior compressor, we ensured a seamless and clean installation.
Technical Details of the Installation
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Indoor Unit Serial Number: AY-XP18ZU1
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Exterior Unit Serial Number: AE-X18ZU1
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Indoor Unit Dimensions (L x D x H): 41.42 x 9.80 x 12.44 inches
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Exterior Unit Dimensions (L x D x H): 33.47 x 13 x 27.94 inches
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Sound Levels:
- Interior: 25–49 dB(A) – whisper-quiet operation
- Exterior: 52.0 dB(A)
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Refrigerant: R-32 (eco-friendly and highly efficient)
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Voltage: 220V
With a 10-10-10 warranty (10 years for compressor, parts, and labor) and Energy Star Cold Climate® certification, the Sharp ZU1 stands out as one of the most reliable heat pumps on the market.
Why the Sharp ZU1 Is the Best Choice for Quebec Homes
Coanda Airflow Control
Sharp’s Coanda technology ensures optimal airflow distribution by following natural air movement principles. This prevents drafts, creates uniform temperatures, and allows the air to reach deeper areas of the home.
Winter Performance – Heating at -27°C
Unlike many heat pumps that struggle in extreme cold, the Sharp ZU1 thrives, delivering consistent warmth during the coldest winter days.
Advanced Defrosting System
Sharp's defrosting technology minimizes heat loss, ensuring that your home stays comfortable while reducing energy waste.
Multi-Space Functionality
Need to balance temperatures across multiple rooms? The Sharp ZU1’s multi-space mode does just that, harmonizing airflow to achieve the perfect balance in every corner of your home.
Why Choose AirGreen for Your Heat Pump Installation?
At AirGreen, we believe that every home deserves a tailored HVAC solution. From start to finish, we prioritize precision, professionalism, and customer satisfaction. Here’s what sets us apart:
- Experienced Technicians: Our team is fully certified and experienced in installing all major HVAC brands.
- Competitive Pricing and Grants: We help you take full advantage of government grants, ensuring you get the best value for your investment.
- Top-of-the-Line Products: We install only the most reliable and energy-efficient systems, like the Sharp ZU1, ensuring long-term comfort and savings.
The Sharp ZU1 isn’t just another heat pump—it’s the very best choice for homeowners in our 2025 Heat Pump Guide! It combines cutting-edge Japanese engineering, eco-friendly design, and unmatched performance, making it a standout product for any Quebec home.
Ready to Upgrade Your Comfort?
If you’re looking for a reliable, energy-efficient, and eco-friendly heating and cooling solution for your home in Montreal, Laval, Longueuil, Rive Nord, or Rive Sud, the Sharp ZU1 is the answer. Contact AirGreen today to learn more about our HVAC installation services and how you can benefit from up to $2,640 in grants!
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
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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).