Installation of a Sharp ZU1 wall-mounted heat pump in Chomedey, Laval
Installation of a Sharp ZU1 wall-mounted heat pump in Chomedey, Laval: 4-season comfort, high R-32 efficiency and discreet design, by AirGreen, HVAC expert in Greater Montreal.
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 HVAC installation project by AirGreen: performance, aesthetics and reliability combined
At AirGreen , each wall-mounted heat pump installation is designed to combine energy efficiency , aesthetics, and durability . This project, carried out in the residential sector of Chomedey, in Laval , perfectly illustrates our commitment to offering high-performance, high-quality HVAC solutions tailored to the specific needs of our customers.
A Sharp ZU1 heat pump: Japanese technology serving Quebec comfort
The heart of this installation is a Sharp ZU1 wall-mounted heat pump , from the Eco Inverter range. This series is distinguished by its inverter compressor technology , its high energy efficiency , and its ability to operate down to −25 °C , guaranteeing constant comfort throughout the year.
Sharp's patented Plasmacluster Ion technology actively purifies indoor air by neutralizing airborne particles, allergens, and odors—a major benefit for urban homes where air quality is paramount.
Project context: a modern condo requiring a compact and quiet installation
The client, owner of a recent condo in Chomedey , wanted to replace a portable air conditioner with a fixed, discreet and energy-efficient solution. The goal: to improve thermal comfort while reducing the electricity bill , particularly during peak periods.
As the available outdoor space was limited, our team opted for mounting on a reinforced galvanized steel wall bracket , guaranteeing stability and optimal air circulation, while preserving the balcony slab.
Key steps of installation
1. Technical study and identification
Before any installation, our technicians conducted a site analysis , including proximity to the electrical panel and the ideal path for the refrigerant lines . The chosen location allowed for gravity drainage of condensate and a short pipe run—a guarantee of increased energy efficiency.
2. Installation of the external compressor
The Sharp Eco Inverter condenser is mounted on a metal base with silent blocks to absorb vibrations and reduce noise. The stainless steel fasteners ensure excellent weather resistance, essential in a climate like Quebec's.
3. Installation of conduits and connections
The power and communication cables , as well as the R-32 refrigerant lines , were routed through discreet white capping , perfectly aligned with the façade. This attention to detail ensures harmonious integration with the building's aesthetics.
4. Testing and commissioning
Once the connections were made, a pressure test and a full vacuum confirmed the absence of leaks. The system was then commissioned and calibrated for optimal operation in heating and cooling mode.
Technical details of the equipment
| Main specifications | Data |
|---|---|
| Make / Model | Sharp ZU1 Eco Inverter |
| Kind | Wall-mounted heat pump (mini-split) |
| Ability | 18,000 BTU |
| Refrigerant | R-32 (ecological and high performance) |
| Operating temperature | Up to −25°C |
| Clean Air Technology | Plasmacluster Ion |
| Energy efficiency | SEER 22 / HSPF 12 |
| Facility | Galvanized wall bracket, gravity drain, dedicated circuit breaker |
Why choose a Sharp ZU1 heat pump?
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Significant energy savings : thanks to inverter modulation, electricity consumption is precisely adjusted to needs.
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Remarkably quiet : The indoor unit has a barely perceptible noise level, perfect for living spaces.
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Compact design : ideal for urban condos and apartments.
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Japanese reliability : Sharp, renowned for its technological rigor, designs systems built to last.
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Simplified maintenance : easily accessible filters and integrated automatic diagnostics.
Technical challenges and solutions
The main challenge of this project was the limited space of the balcony and the proximity of a window , limiting the air release options. Our technicians circumvented this constraint by using a raised wall configuration , ensuring smooth air circulation and reduced vibration transfer.
A sealed outdoor circuit breaker has been added nearby for electrical safety that meets Canadian Electrical Code standards, while facilitating future maintenance.
An investment eligible for energy subsidies
Because the Sharp ZU1 is Energy Star certified and uses R-32 refrigerant , it is eligible for several financial assistance programs available to homeowners in Greater Montreal, including those from Hydro-Québec and the Rénoclimat program. These grants can significantly reduce the cost of acquisition and installation.
Final result: 4-season Japanese comfort
The customer now benefits from stable thermal comfort throughout the year: gentle warmth in winter, rapid cooling in summer, and superior air quality thanks to Plasmacluster technology.
At AirGreen, we believe that every HVAC project should combine performance, durability, and elegance . This installation in Chomedey, Laval , is a perfect example of this—precise, clean, and durable work.
AirGreen — your expert in wall-mounted heat pump installation in Montreal, Laval, Longueuil, North Shore and South Shore.
Entrust your comfort to us: we install, maintain and optimize your HVAC systems so they perform, season after season.
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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Each dot: a town where AirGreen has published projects. The glowing dot: this job.
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).