SHARP CU-B Black Wall-Mounted Heat Pump | 18,000 BTU | R32 -30°C

A high-efficiency wall-mounted heat pump designed for Quebec winters

At AirGreen , we install wall-mounted heat pump systems throughout Montreal, Laval, Longueuil, and on both the North and South Shores . The SHARP CU-B Black 18,000 BTU is one of the models we regularly recommend when our clients are looking for a balance between very low-temperature heating performance, modern design, and smart controls.

This model, with its AY-XPC18CU-B indoor unit and AE-X18CU outdoor unit, offers a nominal cooling capacity of 18,000 BTU , while maintaining heating efficiency down to -30°C . It is ENERGY STAR® Cold Climate certified, making it eligible for programs such as Hydro-Québec's LogisVert (provincial subsidy announced at $2,688 as of November 26, 2025).

We installed this series in condos in Griffintown, duplexes in Villeray, single-family homes in Boucherville, and plexes in Laval. In each case, consistent heating and system stability during periods of extreme cold were key factors.

Actual heating performance at -30°C: what this means in practice

Capacity and efficiency at low temperature

Unlike many entry-level systems that drastically lose power below -15°C, the SHARP CU-B 18,000 BTU retains:

• 22,400 BTU at -8°C

• 19,000 BTU at -15°C

• Guaranteed operation down to -30°C

The COP of 12.23 at -8°C demonstrates excellent energy efficiency for heating. In practice, this means that in a well-insulated 900 to 1200 sq ft house, we observe a stable temperature maintained without frequent use of supplemental electric heating.

In Montreal North, we recently replaced an old R-410A system with this R-32 model. The result: a measured decrease in electricity consumption of approximately 18% over the first two winter months, while improving comfort in the main room.

Hot Gas Pipe Technology and Cold Climate

Sharp's CHU/CU series incorporates a defrosting system with a Hot Gas Pipe . This mechanism reuses the heat produced in heating mode to prevent the outdoor unit from freezing excessively.

In the context of the climate of the South Shore and Laval , where freeze/thaw cycles are frequent, this technology limits prolonged shutdowns and improves the continuity of heating.

Advanced air distribution: uniform comfort without direct drafts

Coanda Airflow: range up to 50 feet

Coanda Airflow technology allows for an air projection that can reach up to 50 feet .

In concrete terms:

• In air conditioning: the air is directed towards the ceiling to descend gently.

• In heating mode: the air is directed towards the floor for more even heating.

In a project in Longueuil with an open kitchen-living room area, this indirect diffusion made it possible to avoid cold zones near the windows while reducing the feeling of direct airflow on the occupants.

Difference between CU and CHU: an important point

It is essential to point out that the CU series , which includes the CU-B Black, does not include the motion sensor or the automatic left-right horizontal control (reserved for the CHU series).

The CU offers:

• Automatic vertical control

• Manual horizontal control

• Multi-Space Function

• Full Power Mode

• ECO mode

• After Care

This distinction is important for our clients who are hesitating between the two versions. We always clearly explain these differences during the HVAC estimate .

Energy efficiency and detailed technical data

Performance indicators

• SEER2: 24.0 to 25.0

• HSPF2: 11.0 to 13.0

• EER2: up to 13.0

• Gas: R-32

• AHRI: 217508914

• ENERGY STAR® (Cold Climate) ID: 4510267

R-32 refrigerant has a lower global warming potential than R-410A and improves thermal efficiency. As part of Quebec's gradual ecological transition, it is a logical choice for a modern residential HVAC system .

Smart comfort and integrated WiFi control

The SHARP CU-B Black includes built-in WiFi via the SHARP AIR app.

Useful features for our customers:

• Remote temperature adjustment

• Timetable

• Energy consumption monitoring

• Filter cleaning alerts

In several rental buildings in Montreal, landlords use this feature to adjust settings in case of a vacant unit, thereby reducing energy costs.

Simplified maintenance and longevity

After Care: self-drying

After each cooling cycle, the After Care function activates the fan to dry the internal heat exchanger.

Concrete advantage:

• Reduction of residual moisture

• Reduced risk of mold

• Less odor at startup

We still recommend annual HVAC maintenance . During our service visits in Laval and on the North Shore, we observe that regularly maintained units retain their performance and optimal noise levels for longer.

Physical characteristics and installation requirements

Dimensions

Indoor unit:

• 41.42 x 9.80 x 12.44 in

• Noise level: 25 to 49 dB(A)

Outdoor unit:

• 33.47 x 13 x 27.94 in

• Noise level: 52 dB(A)

Technical specifications

• Voltage: 220V

• MOP: 25A

• Piping: 1/4 – 3/8 in

• Warranty: 10 years compressor / 10 years parts / 0 years labor

• Additional warranty available

At AirGreen , we always clearly explain the warranty structure and offer extensions when relevant.

Real-life installation experiences in Montreal and surrounding areas

Case 1 – Duplex in Ahuntsic

Replacement of an electrical baseboard heating system + old wall-mounted air conditioner.
Objective: to reduce the electricity bill and improve comfort.

Result :

• Stable temperature on the ground floor

• Significant reduction in short cycles

• High satisfaction with the interior noise level

Case 2 – Condo in Brossard (South Shore)

Initial problem: main room overheated in summer, bedroom colder.

Thanks to the Coanda Airflow and precise horizontal manual adjustment, we optimized air distribution without installing a second unit.

Why choose AirGreen for your HVAC installation

• Certified refrigeration technicians

• $5M liability insurance

• Transparent pricing before work begins

• Field experience in Montreal, Laval, Longueuil, North Shore and South Shore

• Mastery of electrical standards and municipal regulations

We don't just sell heat pumps. We analyze:

• Insulation

• The actual area

• Sun exposure

• The optimal positioning of the unit

• The electrical constraints of the panel

Improper installation can reduce a system's efficiency by 20 to 30%. This is a problem we see far too often when replacing undersized units.

Conclusion

The SHARP CU-B Black Wall-Mounted Heat Pump | 18,000 BTU | R32 -30°C is a solid choice for Greater Montreal homeowners looking for:

• Reliable heating performance down to -30°C

• A modern black design

• Excellent energy efficiency

• Quiet operation

• Smart control via WiFi

For professional HVAC installation in Montreal, Laval, Longueuil, the North Shore, or the South Shore , contact AirGreen today. We will prepare a detailed quote tailored to your property and your specific needs.