Installation of a Sharp BU DoubleZone Heat Pump in Westmount, Montreal
Elevate your home's comfort with the Sharp BU DoubleZone Heat Pump—innovative, efficient, and environmentally friendly. Choose AirGreen for top-notch HVAC solutions!
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.
Transforming Indoor Climates with Advanced Technology
In the picturesque neighborhood of Westmount, Montreal, a significant upgrade in home comfort systems has recently taken place. AirGreen, a leading HVAC service provider, has successfully installed a Sharp BU DoubleZone Heat Pump, known for its high-efficiency and innovative features. This installation not only enhances the comfort of the residence but also aligns with environmental standards, thanks to the energy-efficient design and the integration of cutting-edge technologies like Plasmacluster ionization and the R-32 refrigerant.
A Closer Look at the Sharp BU DoubleZone Heat Pump
This specific model, the Sharp BU, is designed to cater to the complex climate needs of Montreal and its surrounding areas. With two internal units, each providing 12,000 BTU, the system is capable of delivering consistent and effective heating and cooling solutions across multiple zones within a home.
Key Features and Innovations:
- Energy Star® Certification: Guarantees reduced electricity usage.
- WiFi Connectivity: Allows for remote management via smartphones.
- Efficiency Rating: Boasts an impressive 24.0 SEER efficiency.
- Plasmacluster Ion Technology: Offers superior air purification.
- Low Sound Pressure Level: Operates quietly at 50.0 dB(A).
- Advanced Refrigerant: Utilizes R-32, known for its low environmental impact.
Impact of Plasmacluster Technology
One of the standout features of the Sharp BU is its Plasmacluster Ion technology, which dramatically improves indoor air quality. This innovative feature works by emitting a balance of positive and negative ions, similar to those found in natural environments, which help eliminate airborne bacteria, viruses, and mold spores. Additionally, it effectively neutralizes odors and allergens, making it an ideal choice for families, especially those with allergy sufferers.
Environmental and Economic Advantages
The use of R-32 refrigerant in this model underscores a commitment to sustainability. R-32 not only reduces the heat pump's carbon footprint but also improves its operational efficiency, which can be seen in lower monthly energy bills. Furthermore, R-32 is easier to recycle compared to older refrigerants, supporting environmental conservation efforts.
Enhanced Comfort with the Coanda Effect
The installation also features the innovative Coanda effect; this technique optimizes airflow by directing it along room surfaces rather than directly at occupants, ensuring even temperature distribution and increased comfort without the draftiness associated with traditional HVAC systems.
Patented Hot Gas Pipe Technology
Designed to perform optimally in the harsh winters of Quebec, the Hot Gas Pipe system, exclusive to Sharp, prevents ice formation on the external unit, thus maintaining efficiency even at -27°C. This technology ensures that the heat pump operates smoothly throughout the cold season, providing reliable and continuous indoor comfort.
Benefits of a Self-Cleaning System
The Sharp BU is equipped with a self-cleaning function that helps maintain air quality and unit efficiency. This feature minimizes the growth of pathogens inside the unit, reducing maintenance needs and prolonging the system's lifespan.
Tailoring Comfort with Dual Zone Capability
The ability to manage two distinct comfort zones allows occupants to customize the heating and cooling of different areas in the home. This dual-zone capability ensures that each room meets the specific comfort needs of its users, enhancing overall satisfaction with the indoor climate.
Conclusion: A Major Advance for Home Comfort
By choosing the Sharp BU DoubleZone Heat Pump, the homeowners in Westmount have invested in a system that not only enhances their comfort but also contributes to a healthier environment. AirGreen is proud to offer solutions that incorporate both advanced technology and sustainability, ensuring that every installation brings us closer to a future where home comfort systems are both effective and environmentally friendly.
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 BU 24 0002 Zones (Dual Zone) | 25,000 | 21,200 | −27 °C: 14,600 | 2.3 | 24.0 | 11.5 | $3,000 |
| Sharp BU 24 0003 Zones (Triple Zone) | 25,000 | 21,200 | −27 °C: 14,600 | 2.3 | 24.0 | 11.5 | $3,000 |
Among the year’s most efficient according to ENERGY STAR, on top of its cold-climate certification.
Minimum certified capacity (NEEP): it slows down instead of stopping when a single room calls.
NEEP still lists 14,600 BTU/h at a COP of 1.84 at −17 °F.
Global warming potential of R-32, versus 2,088 for R-410A (ENERGY STAR).
Among the year’s most efficient according to ENERGY STAR, on top of its cold-climate certification.
Minimum certified capacity (NEEP): it slows down instead of stopping when a single room calls.
NEEP still lists 14,600 BTU/h at a COP of 1.84 at −17 °F.
Global warming potential of R-32, versus 2,088 for R-410A (ENERGY STAR).
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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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).