Installation of a SHARP ZU1 12,000 BTU Wall-Mounted Heat Pump in Sainte-Marthe-sur-le-Lac: Comfort, Efficiency, and Daily Air Purification
AirGreen installs a SHARP ZU1 12,000 BTU wall-mounted heat pump in Sainte-Marthe-sur-le-Lac: extreme performance down to -27°C, Plasmacluster-purified air, and rebates available on Montréal’s North Shore.
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 fully integrated HVAC solution with cutting-edge technology for a peaceful living space in Sainte-Marthe-sur-le-Lac
At AirGreen, we had the pleasure of completing a new installation of a SHARP ZU1 12,000 BTU wall-mounted heat pump in a lovely residence located in Sainte-Marthe-sur-le-Lac, on the North Shore of Montréal. This project perfectly illustrates our commitment to home comfort, energy efficiency, and indoor air quality.
A compact space, maximum efficiency
From our initial visit, we saw that the target area—a beautifully arranged dining nook—was modest in size, but required consistent thermal comfort year-round. The choice of the SHARP ZU1, renowned for its versatility and ability to adapt to small to medium-sized rooms, was the obvious choice.
The wall-mounted unit was installed in an optimal high position, on a central wall with no obstructions, ensuring even airflow distribution throughout the room. Its sleek white finish fits perfectly with the space’s minimalist aesthetic.
Why choose the SHARP ZU1 12,000 BTU?
Reliable thermal performance in any condition
The SHARP ZU1 12,000 BTU, powered by a variable-speed compressor and using R-32 refrigerant (environmentally friendly), delivers outstanding performance—even in extreme climate conditions. This unit can maintain steady heating output down to -27°C, which is crucial in our region where winters are severe.
Notable technical specifications:
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Maximum heating capacity at -27°C: 7,200 BTU/h
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Nominal capacity: 14,000 BTU (heating), 12,000 BTU (cooling)
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SEER: 21 / 22
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HSPF (cold climate): 12.5 / 11
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Indoor noise level: as low as 23 dB — ideal for quiet residential environments
Air purification with Plasmacluster technology
This ZU1 model is equipped with SHARP’s exclusive Plasmacluster technology, which emits positive and negative ions to neutralize viruses, bacteria, mold, allergens, and odors. A particularly valuable feature in enclosed living areas like dining rooms, where cooking smells and airborne particles can accumulate.
With this technology, the system acts as an invisible barrier against contaminants while maintaining a fresh and healthy atmosphere.
A clean, fast, and long-lasting installation
Our technicians completed the installation in one full day, paying close attention to the aesthetics and discretion of the outdoor unit and wiring. The PVC line cover was painted white to match the interior wall, making the installation nearly invisible.
We also made sure to check the drainage slope, conduct a leak test on the refrigerant lines, and program personalized comfort schedules based on the customer’s lifestyle.
Peace of mind guaranteed
SHARP wall-mounted heat pumps come with a 10-year warranty on the compressor, parts, and labor, offering our customers long-term peace of mind. At AirGreen, we support our clients every step of the way—from quote to installation, including handling grant applications.
Eligibility for grants
The SHARP ZU1 12,000 BTU qualifies for several rebate programs, including Hydro-Québec’s LogisVert program, which offers generous incentives up to $1,700, depending on the home’s features and the replacement being done.
Our AirGreen advisors handle all the prequalification and application processes for our clients—at no cost—ensuring they maximize their financial returns.
Customer testimonial: comfort rediscovered
The homeowner told us that installing this SHARP wall-mounted heat pump transformed her dining area into a haven of comfort. She highlighted the whisper-quiet operation, quick heating, and the noticeably fresher air from the very first days.
Why trust AirGreen?
At AirGreen, we don’t just install machines. We guide each customer through a complete journey toward a sustainable solution tailored to their needs, lifestyle, and budget. Our certified technicians are trained to the latest HVAC standards and ensure impeccable installation, in full compliance with manufacturer and local regulations.
Maintenance tips to extend the life of your SHARP ZU1
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Clean the pre-filter regularly: every 2 to 3 weeks, depending on use
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Watch for odors: if unusual smells arise, activate the Plasmacluster cleaning mode
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Have refrigerant levels checked every 2 to 3 years
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Schedule professional annual maintenance with a certified AirGreen technician
In conclusion
The SHARP ZU1 12,000 BTU wall-mounted heat pump is a complete, energy-efficient, discreet, and high-performance solution for small to medium homes in northern climates like Sainte-Marthe-sur-le-Lac. With advanced technology, optimal performance down to -27°C, and Plasmacluster ion air purification, this unit truly embodies Japanese engineering excellence adapted to Québec’s comfort standards.
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.
Which type of equipment for your project?
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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?
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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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).