Installation of a SHARP ZU1 Mini Split in Old Port of Montréal
Experience the perfect balance of efficiency and elegance with our SHARP ZU1 installation in Old Port, delivering top performance even in extreme temperatures.
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.
Uniting Comfort and Elegance in the Heart of History
In the vibrant and historic district of the Old Port of Montréal, we recently completed an exciting and meticulous installation project of the SHARP ZU1 Mini Split. The Old Port, known for its cobblestone streets and charming architecture, posed unique challenges that required precision and expertise. We didn’t just install a unit; we harmonized cutting-edge technology with the elegance of a classic setting.
Why the SHARP ZU1 Mini Split is a Game-Changer
The SHARP ZU1 isn’t your average ductless unit. Equipped with a powerful cooling capacity of 18,000 BTU and an impressive heating performance down to -27°C, this machine redefines comfort for every season. With energy efficiency rated at 24.0 SEER, homeowners not only benefit from superior climate control but also experience reduced energy bills, making it an environmentally and economically smart choice.
Mastering the Installation Process in a Historic Area
Fitting a modern HVAC system into a district that breathes history requires more than technical skill—it demands an eye for seamless integration. Our experienced team ensured that the installation respected the architectural beauty of the building, running pipes and wiring with precision to maintain the aesthetic appeal. Our goal was simple: achieve peak performance while leaving the character of the Old Port untouched.
- Location Challenges: The Old Port is full of unique layouts and architectural quirks. We strategically planned the positioning of both the indoor and outdoor units to optimize efficiency while minimizing visual impact.
- Elegant Setup: Using discreet and sleek fixtures, we aligned the installation with the charm of the interior decor, even taking extra steps to ensure minimal disruption to the home’s historical feel.
Technical Marvel: Features That Make SHARP ZU1 Stand Out
Energy Star® Certified Excellence
The SHARP ZU1 goes beyond just providing comfort—it does so with minimal environmental impact. Being Energy Star® certified means that every operation, from the softest whisper of cool air to powerful heat during frigid winters, is optimized for efficiency.
Advanced Air Purification with Plasmacluster Technology
What sets the SHARP ZU1 apart is the Plasmacluster ion technology. This feature purifies the air, eliminating airborne bacteria, viruses, and even stubborn odors. For a historic location like the Old Port, where clean air is a premium due to dense architecture, this system becomes a health asset. Imagine air that feels as pure as a mountain breeze, right in the heart of Montréal!
- Odor Elimination: Say goodbye to cooking smells and indoor pollutants.
- Allergen Reduction: Ideal for homes with sensitive individuals or those who suffer from seasonal allergies.
Quiet Comfort with Unmatched Sound Performance
One of our client’s major concerns was noise pollution, as living in a bustling area like the Old Port demands quiet appliances. Thankfully, the SHARP ZU1’s indoor unit operates at a mere 25 dB(A), quieter than a whisper. Meanwhile, the outdoor unit, with a sound pressure level of 52 dB(A), ensures that the serene atmosphere of the neighborhood remains undisturbed.
Precision Engineering: Specifications that Impress
- Cooling Capacity: 18,000 BTU—powerful enough to keep the largest rooms in the Old Port cool and comfortable during humid summers.
- Heating Capability: Performs exceptionally well in extreme cold, down to -27°C.
- Sound Levels: Whisper-quiet indoor operation at 25 dB(A), maintaining peace in the most intimate spaces.
- Dimensions: Compact yet efficient design with an indoor unit measuring 41.42 x 9.80 x 12.44 inches and an exterior unit at 33.47 x 13 x 27.94 inches.
- Freon Type: Uses R-32, a more environmentally friendly refrigerant with a lower Global Warming Potential.
Maximizing Benefits with Hydro-Québec Grants
Homeowners who choose this model are eligible for the highest LogisVert grant, up to $2,640. This financial incentive makes the SHARP ZU1 not only an energy-efficient investment but also a financially savvy one. We assisted our clients in navigating this grant process, ensuring they maximize their savings while upgrading their home comfort.
WiFi Integration: Control Your Comfort from Anywhere
The unit comes equipped with built-in WiFi, providing unparalleled control at your fingertips. Whether adjusting the temperature from the office or scheduling heating for your arrival home, the SHARP ZU1’s smart integration makes climate control simple and efficient.
Warranty for Peace of Mind
We stand by the quality of our installations and the products we offer. The SHARP ZU1 includes a 10-year warranty on the compressor, parts, and labor, giving homeowners complete peace of mind. This comprehensive warranty ensures that your investment is protected and backed by our dedication to top-notch service.
Our Commitment to Excellence at AirGreen
At AirGreen, we don’t just install machines; we enhance lifestyles. Our team is dedicated to understanding the unique needs of each project and tailoring solutions that fit seamlessly into our clients’ lives. In the Old Port, where every installation comes with its own set of challenges, we take pride in delivering results that respect both form and function.
Final Thoughts: Bringing Comfort to the Heart of History
Choosing the right HVAC system is essential, and the SHARP ZU1 Mini Split is a clear winner for anyone seeking efficiency, power, and style. For this project in the Old Port of Montréal, we blended technology with heritage, proving once again that modern comfort can coexist beautifully with historic charm.
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.
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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?
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The outdoor unit is covered in ice: is that normal?
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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).