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

A wall-mounted heat pump designed for Montreal's harsh winters

In Montreal , Laval , on both the North and South Shores , choosing a wall-mounted heat pump isn't just about comparing BTUs. You also need to consider actual winter conditions, defrost cycles, outdoor noise levels in urban areas, and available subsidies.

The SHARP CU 18,000 BTU R32 -30°C Wall Mounted Heat Pump is specifically designed for homeowners who want a reliable HVAC solution in cold climates , without compromising on energy efficiency or heating stability in the middle of January.

At AirGreen , we have installed several CU series units in condos in Rosemont, duplexes in Longueuil, and single-family homes in Laval. This 18,000 BTU model is particularly well-suited for open spaces of approximately 800 to 1,200 square feet, when properly positioned and sized.

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

Capacity and performance in cold conditions

This unit offers a nominal capacity of 18,000 BTU , with solid performance even when the temperature drops drastically:

• Power at -8°C: 22,400 BTU

• Power at -15°C: 19,000 BTU

• Certified operation down to -30°C

• COP at -8°C: 12.23

• HSPF2: 11.015

• SEER2: 24.030

• EER2: 13.020

In practical terms, this means that the heat pump continues to provide stable heat without prematurely switching to electric backup heating, which is a frequent issue in several sectors of the Montérégie and North Shore regions .

During an installation in Boucherville, a client was replacing an old 18,000 BTU R410A unit that was losing significant capacity below -12°C. After installing the SHARP CU R32, the indoor temperature remained constant at 22°C even during a cold snap down to -24°C, with a noticeable reduction in electricity consumption.

R32 technology: energy efficiency and reduced environmental impact

The SHARP CU uses R-32 refrigerant , known for:

• Improved thermal efficiency

• A lower global warming potential (GWP) than R-410A

• An optimized refrigerant charge

For Montreal homeowners concerned about energy efficiency and the environment, switching to R32 is a logical choice. We also observe that R32 systems react more quickly to changes in thermal load in open-concept spaces.

Intelligent air distribution: Coanda Airflow and Multi Space

Coanda Airflow – range up to 50 feet

Coanda Airflow technology allows for air diffusion up to 50 feet.

In air conditioning mode:

• The air is directed upwards to follow the ceiling.

In heating mode:

• The air is directed downwards to efficiently heat the floor.

This avoids the sensation of direct air on the occupants — an important detail in Longueuil condos where the unit is often installed facing the living room.

Multi-Space Function

The Multi Space function extends comfort to adjacent rooms (hallways, dining room). We have observed that in several triplexes in Laval, this feature significantly improves thermal uniformity without the need to install a second indoor unit.

Note: differences between the CU and CHU series

It is important to note that the CU series , including this 18,000 BTU model, does not include the motion sensor or automatic horizontal louvers .

These features are exclusive to the CHU series.

For some customers, this isn't an issue. Automatic vertical control (up/down) is available, while left/right orientation remains manual. In a well-configured space, this is perfectly adequate.

At AirGreen, we always explain this distinction before the sale in order to avoid any confusion between CU and CHU.

Noise level: a crucial criterion in urban areas

• Indoor: 25 to 49 dB(A)

• Outdoor: 52 dB(A)

In densely populated Montreal neighborhoods, outdoor noise is often a concern. At 52 dB(A), the outdoor unit remains discreet. During an installation in Ahuntsic, the immediate neighbor didn't even notice it was running.

The indoor unit, meanwhile, drops to 25 dB(A) at low speed — practically imperceptible in a bedroom.

HVAC Installation: Important Technical Points

Electrical specifications

• Voltage: 220V

• Maximum protection (MOP): 25A

• Piping: 1/4 – 3/8 in

We systematically check:

• Electrical panel capacity

• Actual distance for refrigerant charge calculation

• Optimal positioning for heat diffusion

• Outdoor clearance for snow accumulation

Improperly mounting the outdoor unit is a common mistake. On the South Shore , we systematically install it on a raised wall bracket to prevent ice buildup.

Mobile app and WiFi connectivity

WiFi is included . The SHARP AIR app allows you to:

• Timetable

• Energy consumption monitoring

• Filter maintenance notifications

• Remote adjustment

For owners of rental properties in Laval or Longueuil , this feature allows for better remote control, particularly in winter.

Simplified maintenance and After Care function

The After Care function automatically activates the fan after the air conditioning mode is switched off to dry the evaporator. This reduces:

• The accumulation of moisture

• The smells

• The risk of internal mold

During our annual HVAC interviews, we find that units equipped with this feature have fewer internal biological residues.

LogisVert subsidy and return on investment

This model is eligible for the LogisVert provincial subsidy (updated November 26, 2025: $2,688).

For a homeowner in Montreal replacing a purely electric heating system, the return on investment can be seen within a few years thanks to:

• To reduce heating costs

• High HSPF2 efficiency

• When using R32

We support each client throughout the grant application process.

Why choose AirGreen for the installation of your SHARP CU heat pump?

At AirGreen , we don't just sell equipment. We:

• Let's size it precisely according to the actual heat losses.

• Let's check the electrical compatibility

• We ensure an installation that complies with RBQ standards.

• We offer $5 million in liability insurance

• We guarantee transparent pricing before work begins.

Manufacturer's warranty: 10 years compressor – 10 years parts – 0 years labor (extension possible).

Our team of experienced refrigeration technicians operates throughout Montreal, Laval, Longueuil, North Shore and South Shore .

Conclusion: a reliable, efficient HVAC solution adapted to the Quebec climate

The SHARP CU 18,000 BTU R32 -30°C Wall Mounted Heat Pump represents an excellent balance between performance in cold climates, energy efficiency and optimized cost.

It is particularly suitable for:

• To condos and open-concept houses

• For homeowners looking for a reliable heat pump down to -30°C

• For those who want to maximize the LogisVert subsidy

• Residential projects in Montreal and the Montérégie region

For a detailed quote, technical assessment, or personalized advice, contact AirGreen today. We'll support you every step of the way in your HVAC project, from selection to complete installation.