Installation of a Sharp ZU1 Wall-Mounted Heat Pump in Saint-Lambert
Experience year-round comfort with our Sharp ZU1 heat pump installation in Saint-Lambert, featuring advanced air purification and optimal cold-climate performance.
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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
Efficient Comfort Solutions for Extreme Québec Winters
At AirGreen, we take pride in transforming homes with advanced HVAC solutions that offer both comfort and energy efficiency. Our latest project involved the installation of a 15,000 BTU Sharp ZU1 wall-mounted heat pump in Saint-Lambert, a beautiful suburb on Montréal's South Shore. This installation is not only about adding a heating and cooling system to a residence; it's about delivering a smarter, more sustainable way for homeowners to achieve year-round comfort. Let's dive into the details of this unique installation and the impressive features of the Sharp ZU1 heat pump.
A Tailored Installation for Saint-Lambert's Cold Climate
Saint-Lambert experiences cold winters where temperatures often drop well below freezing. The homeowner needed a system that could not only keep the house warm during harsh winter days but also provide energy-efficient cooling in summer. The Sharp ZU1, with its -27°C heating capacity, is specifically designed to perform in extreme cold, making it an ideal choice for Québec's challenging weather. Our expert technicians at AirGreen conducted a thorough assessment to determine the optimal location for the indoor and outdoor units, ensuring efficient airflow and minimal energy loss.
Strategic Placement for Optimal Performance
The indoor unit was installed in the living area where it could effectively distribute heat throughout the main living spaces. Given the Coanda airflow control feature of the Sharp ZU1, which directs air along the walls and ceiling, the placement ensured that warm air would circulate evenly, providing a comfortable temperature without cold spots. The outdoor unit, protected by a custom anti-corrosive cover, was strategically placed to avoid direct exposure to heavy snowfall while still allowing for efficient airflow.
Why the Sharp ZU1 is a Game-Changer for Québec Homes
Unmatched Cold Climate Performance
The Sharp ZU1 stands out in the market due to its exceptional ability to heat efficiently in temperatures as low as -27°C. Most conventional heat pumps struggle or shut down when temperatures drop below -15°C, but the ZU1’s advanced Hot Gas Pipe System ensures continuous operation, keeping homes warm even in the coldest conditions. This makes it one of the few heat pumps that can truly handle Québec's demanding winter climate, allowing homeowners to rely on their heat pump year-round.
A Greener Choice with R-32 Refrigerant
Environmental sustainability is at the core of AirGreen’s mission, and we are proud to offer products that align with these values. The Sharp ZU1 uses R-32 refrigerant, which has a lower global warming potential (GWP) compared to older refrigerants like R-22 and R-410A. This not only reduces the heat pump’s environmental footprint but also improves its energy efficiency by up to 10%, helping homeowners save on their electricity bills.
Smart Features for a Connected Home
Equipped with built-in WiFi, the Sharp ZU1 allows homeowners to monitor and control their indoor climate from anywhere using a smartphone. The connected app provides real-time data on temperature, humidity, and energy usage, enabling homeowners to optimize the heat pump’s operation and minimize energy waste. Additionally, the motion sensor technology alerts users to any activity in the home, enhancing both comfort and security.
Air Purification That Sets Sharp Apart
One of the key benefits of the Sharp ZU1 is its Plasmacluster air purification technology, a unique feature not found in many other heat pumps on the market. This patented air purification system releases positive and negative ions into the air, neutralizing airborne viruses, bacteria, mold spores, and allergens. For families in Saint-Lambert, this means a cleaner, healthier indoor environment, especially during winter when windows are closed, and indoor air quality can suffer.
Smooth Temperature Control with the Coanda Airflow Feature
The Coanda airflow technology enhances the comfort provided by the Sharp ZU1 by ensuring uniform temperature distribution across the home. By directing airflow along the walls and ceiling, the system avoids blowing air directly onto occupants, making it feel more natural and less intrusive. This is especially important in a home like the one in Saint-Lambert, where the main living area required even heating throughout.
Extended Airflow Reach
With the long diffuser flap, the Sharp ZU1 can push air up to 15 meters from the unit, making it suitable for large rooms or open floor plans. During the installation, we took into account the layout of the home, ensuring that the airflow would reach all corners of the main living space. This guarantees that no matter where you are in the room, you'll experience consistent comfort.
Admissible for the $2,172 LogisVert Grant – The Best in Québec
One of the most attractive benefits of choosing the Sharp ZU1 is its eligibility for the $2,172 LogisVert Grant by Hydro-Québec, the highest grant available for any 15,000 BTU heat pump in the province. This substantial incentive makes the Sharp ZU1 not only a great investment for comfort but also an economically smart choice for homeowners looking to upgrade their heating and cooling systems.
Durability and Peace of Mind with a 10-10-10 Warranty
At AirGreen, we know that reliability is a top priority when it comes to HVAC systems. That’s why the Sharp ZU1 is backed by a comprehensive 10-year warranty on the compressor, parts, and labor. This extensive coverage gives homeowners the confidence that their investment is protected. In addition to the warranty, the anti-corrosive coating on the outdoor unit ensures that it will withstand Québec's harsh winters for years to come.
Why Choose AirGreen for Your HVAC Needs?
As a leading HVAC company in the Greater Montréal area, including Montreal, Laval, Longueuil, the North Shore, and South Shore, we are committed to delivering high-quality installations and exceptional customer service. Our experienced technicians handle every aspect of the installation, from site assessment to final system testing, ensuring a seamless experience for our clients. We also help homeowners navigate the grant application process to maximize their savings.
Expertise in Handling Complex Installations
In this installation, the 1/4 - 3/8 piping and 220V electrical requirements were expertly managed by our team, who ensured compliance with local building codes. The sound pressure levels of the Sharp ZU1, rated at 23 dB(A) for indoor operation, means that the unit runs quietly, allowing the family to enjoy a peaceful environment without any disruptive noise.
Experience the AirGreen Difference
Our commitment goes beyond just installing a heat pump; we aim to provide homeowners with a comfortable, energy-efficient, and environmentally friendly solution tailored to their specific needs. We are passionate about creating cozy living spaces that keep families warm in the winter and cool in the summer. With the Sharp ZU1, Saint-Lambert homeowners can experience all the benefits of modern HVAC technology while reducing their energy consumption and improving indoor air quality.
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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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).