Installation of a Sharp (ZU1 R-32 range) wall-mounted heat pump in Chomedey (Laval)
In Chomedey, AirGreen installs a Sharp ZU1 R-32 wall-mounted heat pump : bracket mounting, clean casing, short path and quiet operation. Experts in HVAC installation and maintenance in Montreal , Laval , Longueuil , North Shore , South 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.
Client objectives and choice of solution
At AirGreen , we are assisting a Chomedey homeowner who wants to air condition the main living area and benefit from efficient heating in the spring and fall, while preserving traffic flow along the side driveway. We recommend and install a Sharp wall-mounted heat pump (ZU1 range with R-32 refrigerant) . This choice meets three priorities: energy efficiency , quiet operation and discreet integration on a vinyl siding facade typical of Laval 's residential areas.
Why the Sharp heat pump (ZU1 R-32 range)
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R-32 : Better heat transfer and lower GWP than R-410A, improving overall efficiency and environmental footprint.
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Precise inverter : fine modulation of the compressor to maintain a stable temperature with fewer on/off cycles.
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Air treatment compatible with Sharp indoor units incorporating ionization functions ( Plasmacluster technology), useful for healthier daily comfort .
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Local parts availability and simplified service , an advantage for annual HVAC maintenance .
HVAC installation methodology: rigor and respect for the site
Installation on wall brackets : stable, clear, accessible
The condenser is mounted on sturdy galvanized brackets . Blue anti-vibration pads provide damping and limit sound transmission to the floor covering. The calculated elevation allows for:
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to avoid the accumulation of snow and debris;
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to facilitate the flow of condensates during defrosting;
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to ensure free ventilation around the exchanger.
Managing a narrow passage with a fence
The side driveway is constrained by a chain-link fence on one side and the facade on the other. We strictly adhere to the recommended clearances for air intake and discharge, avoiding any recirculation effect. The unit's orientation is chosen to channel the airflow towards the open area of the driveway, reducing the risk of localized winter frost on the fence.
Power supply: safety and compliance
An external disconnect box , within easy reach, ensures rapid isolation of the machine for maintenance. The dedicated circuit is sized according to the nameplate and the current Code , with verified grounding , calibrated protections, and perfect sealing of the inputs. We carry out the usual checks: voltage drop, tightening, polarity.
Short refrigeration path and neat aesthetics
The refrigeration connection (insulated copper) and the communication cable follow a direct route from the indoor unit, which reduces the linear length (≈ 3 to 5 m ), therefore the pressure losses and the risks of heat recovery. The external casing is installed neatly, with tight radii and junctions, for a clean facade and easy future maintenance.
Condensate drainage
In summer, the wall head operates by gravity : continuous slope of the drain towards the outside, without condensate pump - one less source of noise and maintenance. In winter, we provide a defrost drip zone which does not obstruct the passage or the base of the brackets .
Commissioning: precision and traceability
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Deep vacuum (≤ 500 microns) and vacuum resistance test.
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Opening of valves, leak testing and reading of load parameters (pressures, intensity, superheating/subcooling).
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Blowing temperature and noise level measurements.
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User settings: Eco , Silent modes, time programming, recommended settings for the climate of Montreal / Laval / Longueuil / North Shore / South Shore .
Results obtained: discreet comfort and tangible effectiveness
Summer comfort and winter support
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Even and rapid air conditioning in the living area; inverter modulation prevents jolts.
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In the off-season , the heat pump covers most of the needs at low operating cost (COP > 1), relieving the burden on electric baseboards.
Mastered visual integration
The bracket + cover combination provides a clean and compact appearance. The condenser does not encroach on traffic along the fence and remains easily accessible for maintenance.
Peace and quiet for the neighborhood
The anti-vibration pads and Quiet mode keep noise levels very low. This is valuable in close-knit areas such as those found in Chomedey , Sainte-Dorothée or Duvernay .
Tips for maximizing performance
Winning Settings and Habits
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Summer setpoint 23–24 °C; winter 20–21 °C.
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Activate the programming (morning/evening departures) to limit reminders.
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Internal filters : clean every 4–6 weeks during peak season.
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Keep 30–60 cm clear around the condenser (snow, vegetation, bins).
Preventive HVAC Maintenance
An annual AirGreen HVAC maintenance includes:
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gentle cleaning of exchangers;
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checking drains , fixings and connections ;
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electrical checks (intensities, voltages), and reading of refrigeration parameters;
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Updated tips based on site history.
This maintenance extends the lifespan and maintains seasonal yields .
Technical points specific to this project
Implementation details
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Vinyl facade : careful sealing of holes with vapor barrier sleeve and compatible mastic.
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Close fence : clearances adjusted to ensure free suction ; no obstacles in front of the discharge.
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Base and brackets: load distribution, calculated center distances, stainless steel anchors ; free access for defrosting .
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Reduced refrigeration length : better efficiency, shorter response time, less fluid required than on a longer route.
Challenges encountered and solutions provided
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Narrow side corridor : direct the air discharge towards the open area and wedge the brackets to free the passage.
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Risk of recirculation at the closing angle: operational check and adjustment of the inclination of an internal deflector to avoid air short circuit.
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Winter protection : recommendation of a lightweight snow shield if necessary and inspection after the first storm.
Grants and Document Compliance
Sharp ZU1 R-32 series wall-mounted heat pumps can meet the eligibility criteria of current programs depending on the capacity, the cold version and the SEER/HSPF ratings of the AHRI certified unit. Our team takes care of:
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performance verification (negative operating range, seasonal efficiency),
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proof of installation (photos, diagrams, AHRI number),
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and support for financial procedures in Greater Montreal.
Quick comparison to guide a similar project
Wall-mounted heat pump vs. wall-mounted air conditioner
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The heat pump offers reversible heating with reduced operating costs in mid-season.
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Best return on investment for 4-season use in Montreal , Laval and surrounding areas.
Wall-mounted heat pump vs. central heat pump
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Less invasive work (no conduits), ideal for light renovations.
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Lower initial investment and simpler maintenance.
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Possibility of further development in MultiZone for other rooms.
Conclusion: AirGreen expertise at the service of exemplary installation
This HVAC installation in Chomedey demonstrates the perfect balance between efficiency , quietness , and discretion . The Sharp wall-mounted heat pump (ZU1 R-32 series) integrates naturally into the side aisle, without compromising circulation or maintenance. With a short cooling path , an accessible disconnect , and an anti-vibration mounting , the system delivers measurable comfort in both summer and winter—ready to operate for a long time, with minimal but regular HVAC maintenance .
Are you considering a project in Montreal , Laval , Longueuil , on the North Shore or the South Shore ? Our AirGreen team takes care of sizing , installation , maintenance , and grant optimization so that your heat pump offers you the best technology, every day.
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?
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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).