Installation of a SHARP ZU1 12000 BTU Wall-Mounted Heat Pump in Saint-Lambert – Reliable Performance Even in the Harsh Quebec Winter
AirGreen installed a SHARP ZU1 12000 BTU wall-mounted heat pump in Saint-Lambert, delivering -27°C performance and purified air through Plasmacluster technology. Elevated setup, 10-year warranty, impeccable service.
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.
An AirGreen Installation in Saint-Lambert, Combining Energy Efficiency, Purified Air and Optimal Comfort
As part of our recent residential projects in the South Shore, we had the opportunity to install a SHARP ZU1 12000 BTU wall-mounted heat pump in a home located in Saint-Lambert, a city known for its architectural charm and the high expectations of its residents when it comes to indoor comfort. This installation is part of our commitment to providing high-quality HVAC (heating, ventilation and air conditioning) solutions to residents of Montréal, Laval, Longueuil, the North Shore and the South Shore.
Why Choose the SHARP ZU1 Series?
Performance Built for Quebec’s Climate
The SHARP ZU1 12000 BTU model, powered by R32 refrigerant, is engineered to meet the demanding climate of Quebec, with a heating capacity of up to 7,200 BTU/h at -27 °C. This feature is essential in a region like Saint-Lambert, where winter temperatures can be particularly extreme.
Plasmacluster Technology – Built-In Air Purification
Exclusive to SHARP, Plasmacluster technology is built into all ZU1 units. It generates positive and negative ions to neutralize viruses, bacteria, mold and allergens, while also significantly reducing odours (tobacco, pets, cooking). In a residential context, this represents a significant advantage for families concerned about their indoor air quality.
Compact Unit with Sleek Design
The outdoor unit shown in the photo was installed on an elevated aluminum stand, securely anchored to a concrete slab. This setup allows for optimal drainage and protects against snow or water buildup. With a total weight of 30 kg and compact dimensions (30 23/32" x 21 1/4" x 10 19/32"), the system integrates seamlessly with the architectural surroundings of the home.
Technical Specifications of the SHARP ZU1 12000 BTU
| Specification | Value |
|---|---|
| Cooling capacity | 12,000 BTU/h |
| Heating capacity | 14,000 BTU/h |
| Heating at -27 °C | 7,200 BTU/h |
| SEER | 22 |
| HSPF (Zone IV) | 12.5 |
| Sound level (indoor) | Min 23 dB – Max 43 dB |
| Refrigerant | R-32 (eco-friendly) |
| Warranty | Up to 10 years on compressor and parts |
| Plasmacluster | Yes – Built-in air purification |
Installation Details in Saint-Lambert
Initial Assessment and Customer Needs
The homeowner was looking to replace their old wall-mounted air conditioner with a more efficient heating system, in order to reduce reliance on electric heating while improving indoor air quality. After a full thermal evaluation, we recommended the SHARP ZU1 12000 BTU model, perfectly suited for the size of the ground floor.
Preparation and Setup
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Strategic placement: The indoor unit was positioned in a central open-concept area to ensure even air distribution. The outdoor unit was installed in the backyard, positioned away from prevailing winds for enhanced performance.
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Raised base: The AirGreen team poured a reinforced concrete slab, then installed a galvanized aluminum support frame to elevate the outdoor unit, preventing any buildup of water, ice or snow.
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Drilling and connections: We drilled through the load-bearing wall with precision to route the refrigeration lines (1/4 x 3/8 in.) as well as the electrical connections.
Commissioning and Testing
Once the installation was complete, we:
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Tested the system in both cooling and heating modes.
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Checked for tight connections and refrigerant leaks.
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Measured air output, sound levels and real-time power usage.
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Programmed the energy-saving modes via the wall-mounted remote control.
Benefits for the Client
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Immediate and stable comfort, even during bitter -25 °C nights.
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Continuously purified air thanks to Plasmacluster technology.
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Lower energy bills, thanks to a SEER rating of 22 and Inverter compressor modulation.
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10-year warranty, ensuring peace of mind for a full decade.
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Potential eligibility for the LogisVert grant, depending on the home's initial energy profile (eligibility criteria apply).
What Sets AirGreen Apart in Saint-Lambert
At AirGreen, we go beyond basic HVAC installation. Every project is a tailored collaboration, where we customize our recommendations based on each client’s specific needs, home layout, and long-term energy goals.
We stand out with:
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Certified technicians specialized in SHARP wall-mounted heat pumps.
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Free detailed thermal assessments.
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Full transparency regarding available grants.
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A responsive after-sales service for future maintenance or adjustments.
Results and Customer Satisfaction
After a few weeks of use, the customer shared their impressions:
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The system’s quiet operation, even at maximum output, was a major plus.
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A noticeable improvement in air quality, especially the disappearance of lingering smells.
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The temperature stability, particularly in open-plan areas, was impressive despite the extreme cold outdoors.
This project is yet another example of our ability to offer heating and cooling solutions tailored to modern needs, with a strong focus on comfort, sustainability, eco-friendliness, and energy savings.
AirGreen: Your Trusted Expert for SHARP Wall-Mounted Heat Pump Installations in Saint-Lambert and the South Shore
Count on our team to help you choose the best wall-mounted heat pump based on your budget, home, comfort expectations, and energy-saving goals. Whether you live in Saint-Lambert, Longueuil, or elsewhere on the South Shore, we're here to deliver impeccable service from your first call to final system startup.
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.
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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).