A SHARP ZU1 18000 BTU Wall-Mounted Heat Pump Installed with Precision in Saint-André: AirGreen’s Commitment to Sustainable Comfort
Professional installation of a SHARP ZU1 18000 BTU wall-mounted heat pump in Saint-André by AirGreen. Ideal for extreme winter conditions down to -27°C with Plasmacluster air purification.
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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
A perfectly adapted heat pump installation in Saint-André
At AirGreen, our expertise in HVAC system installations across Montréal, Laval, Longueuil, as well as the North Shore and South Shore, allows us to deliver highly efficient cooling and heating solutions designed to withstand Québec’s harsh winters. Recently, we had another opportunity to demonstrate our know-how by installing a SHARP ZU1 18000 BTU wall-mounted heat pump in the peaceful residential neighborhood of Saint-André.
This project was a great example of how to integrate a high-performance unit into a compact but critical space: a semi-enclosed area under a concrete balcony. While this configuration posed a challenge, our team turned it into an optimized and seamless installation.
Why choose the SHARP ZU1 18000 BTU? A compact powerhouse for Québec’s climate
The SHARP ZU1 wall-mounted heat pump with 18,000 BTU is one of the most advanced models in the ZU1 series, specifically engineered for northern climates. Equipped with R-32 refrigerant, it is environmentally friendly while maintaining high energy efficiency. Here’s what makes this unit ideal for our region:
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Operates in temperatures as low as -27°C, ensuring reliable heating during the coldest Québec winters.
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Exclusive Plasmacluster technology: purifies indoor air by neutralizing bacteria, viruses, and mold, and eliminates persistent odors.
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SEER 24 / HSPF up to 11: excellent energy efficiency in both cooling and heating modes.
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Compact and quiet wall-mounted design, perfect for single-family homes and small spaces.
A carefully optimized installation in a constrained space
The installation site in Saint-André had a unique constraint: the outdoor unit had to be placed beneath a concrete balcony with limited clearance. Thanks to our on-site experience, we anticipated ventilation, drainage, and vibration-related challenges.
Key installation steps:
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Foundation preparation: Two stabilized concrete slabs were placed on a compacted gravel bed to ensure a solid base and effective drainage.
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Galvanized aluminum mounting structure: We selected a raised, corrosion-resistant structure to allow optimal air circulation beneath the unit and facilitate defrosting.
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Anti-vibration setup: Rubber pads were integrated to minimize vibration and ensure quiet operation.
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Secure connections: Refrigerant lines and electrical cables were neatly integrated, with weather-resistant protective sheathing.
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Strategic orientation: The unit was positioned to optimize the discharge of hot air, even in this semi-enclosed space.
Exceptional performance even in winter
Thanks to SHARP’s patented Hot Gas Pipe technology, this ZU1 heat pump can deliver 11,500 BTU/h at -25°C and 10,100 BTU/h at -27°C, maintaining constant comfort even during freezing rain or extreme cold spells.
This ability to perform in very low temperatures is a major advantage for Québec residents who want a primary heating system that is both powerful and energy-efficient.
Comfort without compromise, powered by AirGreen
Beyond equipment performance, it’s our customized approach, rigorous customer service, and commitment to quality that make all the difference. At AirGreen:
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We always analyze the immediate environment before every installation.
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We follow best practices tailored to each home configuration.
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We work exclusively with recognized and certified brands, like SHARP.
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We adhere to all available grant programs, such as Hydro-Québec’s LogisVert Program, for which this model is eligible for up to $1,704 in rebates.
Peace of mind, guaranteed
The SHARP ZU1 wall-mounted heat pump comes with a 10-year warranty on the compressor, parts, and even labor—if installed by a certified contractor, which AirGreen is proudly recognized for across the Greater Montréal Area.
Our HVAC expertise, serving your long-term comfort
This installation in Saint-André is just one of hundreds of projects completed by AirGreen throughout Greater Montréal. We tailor every job to your home, your lifestyle, and your energy-saving goals.
Our technical teams undergo ongoing training in the latest technologies (R-32, smart systems, Plasmacluster, Alexa/Google-compatible home automation) to offer you solutions that are modern, sustainable, and energy-smart.
In summary: Why choose the SHARP ZU1 installed by AirGreen?
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18,000 BTU capacity, ideal for large rooms or open-concept spaces.
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Extreme cold performance down to -27°C, for dependable heating during Québec’s harshest winters.
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Plasmacluster air purification technology: healthier air for the entire household.
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Clean, professional installation even in tight or hard-to-reach locations.
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Eligible for energy rebates under the LogisVert program.
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10-year comprehensive warranty when installed by our certified technicians.
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Fast, courteous, and professional service, tailored to the needs of clients on the North Shore, South Shore, Montréal, Laval, and Longueuil.
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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An on-site estimate, the right capacity, the right equipment.
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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).