Installation of a Sharp ZU1 wall-mounted heat pump in Chomedey (Laval)
Careful installation of a Sharp ZU1 in Chomedey (Laval): wall-mounted heat pump on brackets, vertical capping , accessible disconnect switch, compliant clearances. AirGreen — sustainable HVAC installation for Greater Montreal.
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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
An elegant and robust installation for four-season comfort
At AirGreen , we prioritize clean, aligned, and accessible installations. Here in Chomedey (Laval), the Sharp ZU1 condenser is mounted on wall brackets above a partially covered terrace. The positioning under the eaves protects the equipment from the elements, reduces snow accumulation, and limits the risk of rainwater splashing onto the facade. The result: a discreet, quiet, and efficient system, ready to cool in the summer and heat in the mid-season and winter, depending on the capacity of the Sharp range.
Home context and client objectives
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Single-family brick home with rear deck and wooden pergola .
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Need for targeted air conditioning for the main living area and heat supply during cold periods.
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Priority given to aesthetic integration : no visible cables, uniform capping , minimized drilling and secure access for maintenance.
Why the Sharp ZU1 for this type of home
The Sharp ZU1 ( R-32 refrigerant) is one of the recent generations of wall-mounted heat pumps geared towards high efficiency and reduced environmental footprint. It combines:
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Stable air conditioning performance for July/August heat waves.
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Useful heating capacity in cold weather thanks to inverter technology.
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Quiet operation, ideal for installation near an outdoor relaxation area.
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Condenser compactness : ideal for brick facades where every hole counts.
Depending on the capacity chosen (9k to 24k BTU in this family), the ZU1 easily covers an open-plan space, a ground floor, or a targeted upper floor. For accurate sizing, we consider the building envelope, orientation, insulation, and occupancy habits.
The technical points that make the difference
Support, clearances and anti-vibration
The condenser is raised approximately 2.3 m on sturdy galvanized brackets , which:
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frees up the ground space on the terrace,
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place the unit away from accumulated snow,
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facilitates winter drainage and air circulation.
We add anti-vibration pads and maintain the required clearances on the walls, eaves, and sides to ensure optimal airflow. This detail reduces noise transmitted to the structure and improves compressor durability.
Refrigeration and electricity route
The refrigerant pipes run vertically, straight and protected by UV-resistant beige capping : a careful drop of approximately 2.5 to 3 m to the low entry point on the brick. This choice:
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protects the insulation against UV rays and shocks,
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facilitates future interventions,
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ensures an aesthetically straight and clean line.
Near the condenser, we install a convenient disconnect switch , powered by a dedicated circuit in the electrical panel. The external wiring follows the same axis as the piping for a minimalist and compliant look.
Condensate management
Condensate drainage is provided by gravity when the interior layout allows. In the presence of a terrace, we take care to avoid any dripping that would be bothersome for the occupants and to prevent the formation of ice on the decking in winter. If gravity slope is not possible in another context, we integrate a silent condensate pump with an accessible maintenance line.
Drilling and sealing
The brick is carefully drilled, a sleeve is installed, and caulked with a high-performance exterior sealant. Inside, a discreet cladding on the back of the wall header ensures a clean finish. We plan a slight anti-capillary drip to prevent infiltration into the wall.
Winterization and protection
Even if the unit is partially sheltered, we validate:
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the equivalent ground clearance (here, managed by the height on brackets),
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the absence of obstacles to air discharges ,
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orientation to limit recirculation under the awning.
Installation under a canopy requires avoiding hot air confinement in heating mode: the frontal and lateral clearance, respected here, prevents this phenomenon.
Typical installation process at AirGreen
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On-site inspection : brick structure, anchors, capping layout, ladder/scaffold access, terrace protection.
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Installation of brackets : mechanical sealing in the brick joints (when possible) or suitable doweling; checking the level and offset for maintenance.
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Installation of the condenser : flexible connections, anti-vibration , checking clearances at the soffit.
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Drilling and passage : refrigeration lines flared to the couple , vacuum drawing, nitrogen leak test, vacuum resistance.
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Electrical connection : external disconnector , wiring to the dedicated circuit breaker , safety tests.
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Finishing : complete cover , sealants, attachments, site cleaning.
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Commissioning : temperature , pressure , intensity measurements, user instructions and HVAC maintenance advice.
Observed results and daily comfort
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Uniform cooling of the living area, even during heat waves in Laval.
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Exterior noise contained thanks to height, anti-vibration and frontal clearance.
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Aesthetics : straight lines, uniform cladding, successful visual integration under pergola.
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Easy maintenance : secure access by ladder, disconnect switch within reach, clearances respected.
Tips for use and maintenance for longevity
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Filters : clean every 4 to 8 weeks during periods of intensive use.
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Clearances : Keep space free around the condenser, avoid storing objects under the unit.
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Snow and ice : check after storms, never obstruct ventilation.
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Auto mode in moderation: for constant comfort, prioritize cold in summer and heat in winter rather than frequent switching.
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Recommended annual maintenance visit : pressure/temperature inspection, tightening, exchanger cleaning, electrical and condensate check.
Pitfalls to avoid in this type of configuration (brick facade + terrace)
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Discontinuous capping or too many elbows: aesthetic impact and weak points. We favor a short and vertical route .
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Undersized brackets : risk of vibration and deflection. We select brackets certified for load and wind resistance.
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Insufficient clearances under the awning**: recirculation of hot/cold air and reduced efficiency. The height and location chosen prevent this.
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No accessible disconnect switch **: non-compliance and complicated maintenance. Here, the disconnect switch is located on the right side of the unit.
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Neglected water management **: runoff on terraces or freezing in winter. The slope and drainage are planned from the layout.
Grants and Compliance
Recent high-efficiency wall-mounted heat pumps such as the Sharp ZU1 (R-32) may be eligible for certain programs in effect in Quebec, subject to conditions (model, power, performance, eligible residence). We assist our clients in verifying eligibility and preparing documents, whether in Montreal , Laval , Longueuil , on the North Shore or the South Shore .
Why AirGreen for your HVAC installation in Laval and Greater Montreal?
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Wall and central specialists : advice, sizing, installation and after-sales service.
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Respect for brick facades : controlled openings, clean finishes, aesthetic integrations.
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Measurement culture : vacuum gauge, nitrogen, controlled torques, load tests.
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Local service : rapid interventions in Laval, Montreal intramural, North Shore , South Shore .
Whether you are considering a wall-mounted heat pump , a wall-mounted air conditioner or a multi-zone solution, we offer clean, efficient and durable installations, adapted to the architecture of your home and your comfort.
Context keywords : heat pump , wall-mounted heat pump , HVAC installation , Sharp ZU1 , Laval , Chomedey , capping , wall brackets , HVAC maintenance , Greater Montreal .
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).