Winter Comfort Secured with the Installation of a SHARP ZU1 15,000 BTU Wall-Mounted Heat Pump in Chomedey, Laval
Installation of a SHARP ZU1 15,000 BTU wall-mounted heat pump in Chomedey, Laval. Performs down to -27 °C, with Plasmacluster air purification and energy efficiency. Optimal comfort, professionally installed by AirGreen.
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.
In the snowy residential neighborhood of Chomedey in Laval, our teams recently completed a installation of a SHARP ZU1 15,000 BTU wall-mounted heat pump, a solution perfectly suited to the Quebec climate and the growing demand for energy performance and four-season comfort. This project once again showcases our expertise in residential HVAC installation in urban settings.
A harsh climate that requires a reliable heat pump down to -27 °C
Winters in Laval are unforgiving. During this installation, the outdoor conditions were icy, with a layer of black ice covering the paved surface. Installing a reliable HVAC system in such conditions requires more than just a good product: it demands expertise, precision, and attention to detail. The SHARP ZU1 wall-mounted heat pump is specifically designed to withstand these extremes, with heating capacity maintained down to -27 °C without loss of performance.
Why the SHARP ZU1 15,000 BTU model?
We recommended this model for several key reasons:
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Integrated Plasmacluster Technology: This unique air purification system releases positive and negative ions that neutralize viruses, bacteria, mold, and allergens suspended in the air.
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R-32 Refrigerant: An eco-friendly choice, with a global warming potential reduced by more than 65% compared to R-410A.
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Excellent energy efficiency: With a SEER of 24 and an HSPF of 11.8, this heat pump offers significant savings on electricity bills, especially during the cold months.
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Quiet operation: Indoors, the noise level can drop to as low as 23 dB, providing remarkable acoustic comfort.
Key steps of the installation in Chomedey
Environmental analysis and planning
Before installation, our technicians conducted a thermal analysis of the residence to ensure that the 15,000 BTU capacity was suitable for the area to be covered. The location of the outdoor unit was also strategic: we chose a spot sheltered from prevailing winds while facilitating condensate drainage, a crucial element in this area highly exposed to freezing.
Secure installation of the outdoor unit
As shown in the photo, the outdoor unit was placed on solid, elevated support blocks to avoid any contact with ice buildup. We also integrated protections against ice backflow and moisture rise.
A DucanTech enclosure ensures a secure electrical connection, meeting current standards for outdoor HVAC systems.
Integration of the indoor unit and commissioning
The indoor unit was mounted at an ideal height to optimize the Coanda airflow, a SHARP-specific technology that allows even air distribution throughout the room without blowing directly on occupants.
After the complete installation, our technicians conducted performance tests, validated the system’s efficiency, and took the time to explain to the client how the smart remote control works and the available modes (heating, cooling, dehumidification, ventilation).
Respiratory comfort thanks to Plasmacluster purification
In addition to regulating temperature, this heat pump significantly improves indoor air quality. Thanks to Plasmacluster technology, occupants enjoy a healthier environment, free of persistent odors, airborne viruses, and with fewer allergens – an important benefit in a neighborhood like Chomedey where many families live with children or seniors.
An energy-efficient system eligible for subsidies
This SHARP ZU1 model qualifies for government subsidies and rebate programs such as Hydro-Québec’s LogisVert program, when criteria are met. We always assist our clients with these processes to maximize their return on investment.
Challenges overcome by our team
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Icy ground: Need to secure the installation to prevent infiltration and slipping.
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Negative temperatures during installation: Testing the system’s proper operation under real conditions right from installation.
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Respect for residential aesthetics: The outdoor unit was installed to minimize its visual impact while ensuring optimal performance.
Maintenance tips to ensure the heat pump’s longevity
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Regularly clean the HEPA filter to maintain air quality.
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Check condensate drainage in winter to prevent ice buildup.
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Schedule annual HVAC maintenance with AirGreen to ensure efficient operation year after year.
What the client in Chomedey takes away
At the end of the project, our client expressed great satisfaction with the speed of the installation, the administrative support for subsidies, and especially the instant thermal comfort in her home. Thanks to an installation by AirGreen, she is now ready to face all Laval winters with complete peace of mind.
AirGreen, your trusted HVAC expert in Laval and the North Shore
At AirGreen, we do more than just install equipment. We support our clients at every step, from choosing the right model to installation, including energy optimization and peace of mind.
Whether you are in Laval, Montreal, Longueuil, on the North Shore or the South Shore, we put our expertise at the service of your lasting comfort. Every wall-mounted heat pump installed is designed to last, perform, and integrate perfectly into your living space.
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?
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).