An installation in Lacolle designed to protect the heat pump and maintain clear access around the outdoor unit
In Lacolle, on Montreal’s South Shore, we completed an installation of a Fujitsu AIRSTAGE Altair 500 wall-mounted heat pump in a configuration that perfectly illustrates the importance of the work surrounding the unit itself. Choosing the right heat pump is essential, but its location, height, protection from precipitation, refrigerant line routing, and management of the space around the outdoor unit have a direct impact on the quality of an HVAC installation.
In the photo of this installation, several details immediately stand out. The Fujitsu outdoor unit is raised on a metal bracket secured to the foundation, rather than placed directly on the ground. A transparent awning-style cover has also been installed above the unit. It helps limit the direct accumulation of snow and ice from the roof or sky while maintaining a largely open space around the heat pump for air circulation.
We can also see a clean finish along the mechanical run: the lines are grouped inside a rigid white line-set cover, installed horizontally along the wall. The electrical components are positioned close to the unit without obstructing its front or the ventilation area.
This is exactly the type of project where installation details matter just as much as the technical specifications.
Why raise a wall-mounted heat pump in Quebec?
For an installation in Lacolle, as elsewhere in Montreal, Laval, Longueuil, the North Shore, or the South Shore, winter creates constraints that cannot be treated as a minor detail.
A heat pump operating in heating mode must be able to draw in and expel air freely. It must also manage its defrost cycles. During these cycles, water may form beneath the outdoor unit. If the system is installed too close to the ground, the accumulation of snow, ice, or frozen water can gradually reduce the available clearances.
In this installation, we therefore prioritized an elevated position, with a sturdy metal bracket. This setup helps in particular to:
- keep the heat pump above part of the accumulated snow;
- leave space beneath the appliance for defrost water drainage;
- reduce the risk of vegetation or debris blocking the base of the unit;
- facilitate access to the connections during future HVAC maintenance or service work;
- preserve better air circulation around the outdoor heat exchanger.
The small concrete slabs visible on the ground do not directly support the heat pump in this configuration. The outdoor unit is mounted higher on its metal structure, which is a particularly logical choice in our climate.
A transparent canopy installed without enclosing the outdoor unit
The other distinctive feature of this Fujitsu Altair 500 installation in Lacolle is the protection installed above the outdoor unit.
A canopy can be very useful, but it must be installed correctly. Above all, the heat pump must not be turned into an appliance enclosed in a kind of cabinet. An outdoor unit depends on a substantial airflow: blocking its intake or discharge can impair its performance.
Here, the structure is open on the sides and front. The transparent top panel provides physical protection while maintaining free air volume around the machine. The arched shape also helps direct water toward the sides rather than directly onto the top of the unit.
This type of protection is particularly useful when the unit is located beneath an area where it may be exposed to snow, freezing rain, or water from the roof.
We always assess the situation before recommending a shelter. The priority remains maintaining the equipment clearances and ensuring normal operation.
Fujitsu AIRSTAGE Altair 500: an R-32 refrigerant wall-mounted lineup
The Fujitsu AIRSTAGE Altair 500 belongs to Fujitsu’s single-zone H series. The lineup includes several capacities, namely the 09KPAS1, 12KPAS1, 18KPAS1, 24KPAS1, 30KPAS1, and 36KPAS1 models. According to the technical data sheet provided by Fujitsu, the rated cooling capacities range from 9,000 to 33,000 BTU/h, while the rated heating capacities range from 10,000 to 34,000 BTU/h.
Capacity selection should never be based solely on the approximate area of a property. When preparing a wall-mounted heat pump installation, we must also consider the room layout, floors, insulation, windows, sun exposure, heat loss, and the space available for the indoor unit.
A larger unit is not automatically a better unit. Proper sizing allows Inverter technology to modulate its output more efficiently instead of operating in a range poorly suited to the building’s actual needs.
R-32 with a reduced global warming potential
The Altair 500 range uses R-32 refrigerant.
In its documentation, Fujitsu indicates a global warming potential of 675 for R-32 versus 2088 for R-410A, representing a stated 68% reduction in GWP. The manufacturer also points out that R-32 systems require a reduced amount of refrigerant while maintaining the desired heating performance.
For a homeowner currently comparing different wall-mounted heat pumps in Quebec, the type of refrigerant is becoming an increasingly relevant criterion. It influences system design, installation procedures, and technicians’ service practices.
Performance suited to four-season use
The Altair 500 is designed to provide both cooling and heating.
Fujitsu documentation indicates a normal heating operating range down to -15 °C for the series’ models. Some models also allow special operation in cooling mode at low outdoor temperatures, down to -20 °C depending on the relevant settings and capacities.
It is important to understand what this means in the Quebec climate. A heat pump capable of operating at low temperatures can considerably reduce the use of a secondary heating source during much of the winter, but the building’s performance at very low temperatures must always be taken into account.
In Lacolle, periods of winter cold justify a serious analysis of the complete system rather than a comparison based solely on the purchase price.
Efficiency ratings of up to 26.0 TRÈS2
Depending on the capacity selected, the series’ efficiency ratings vary.
The Altair 500 technical specifications notably indicate:
- up to 26.0 TRÈS2 for the 9,000 BTU model;
- 24.0 TRÈS2 for the 12,000 BTU;
- 22.0 TRÈS2 for the 18,000 BTU;
- 21.5 TRÈS2 for the 24,000 BTU;
- 22.0 TRÈS2 for the 30,000 BTU;
- 21.0 VERY2 for the 36,000 BTU model.
The announced regional V CPSC2 values range from 7.7 to 8.3, depending on the model.
These figures are useful for comparing machines of equivalent capacity, but they do not replace a selection based on the building’s needs. The best heat pump is the one whose features match the actual project and whose installation allows the system to operate under the conditions specified by the manufacturer.
Indoor operation as low as 19 dB(A)
Acoustic comfort is often a priority when the indoor unit must be installed near a living room, bedroom, or workspace.
For the 9,000 and 12,000 BTU Altair 500 models, Fujitsu indicates an indoor sound level as low as 19 dB(A) in quiet mode. Higher-capacity models have different minimum levels because of their higher airflow rates.
The range offers six fan speeds plus automatic mode. This modulation helps maintain the temperature more gradually, rather than constantly operating at full speed.
The outdoor unit also has a low-noise operating mode, an interesting feature when the unit is installed near a patio, window, or neighboring property.
An indoor design focused on durability
Fujitsu also highlights several physical features of the Altair 500 series. The indoor unit notably uses ProCore copper coils designed to provide increased corrosion resistance, as well as a heat exchanger with Hydro Fin treatment.
The system includes a backlit wireless remote control, while various control solutions are available as options: Wi-Fi adapters, wired controllers, and interfaces allowing integration with certain automation systems.
The documentation notably provides for compatibility with options allowing BACnet and Modbus integration, which broadens this platform’s appeal beyond a very basic residential installation.
Piping dimensions change depending on the selected capacity
A mistake we sometimes see when an older heat pump is replaced is assuming that the existing piping will automatically be compatible with the new unit.
That is not the case.
For the Altair 500, Fujitsu indicates different dimensions depending on capacity:
9,000 and 12,000 BTU:
3/8 in. gas and 1/4 in. liquid.
18,000 and 24,000 BTU:
1/2 in. gas and 1/4 in. liquid.
30,000 and 36,000 BTU:
5/8 in. gas and 3/8 in. liquid.
This is important information both for a new installation and for a replacement.
A refrigerant line should not be selected simply because it is already in the wall. Before reusing an existing line, we must check its diameter, condition, length, routing, and compatibility with the new equipment.
A piping length that allows for greater installation flexibility
The Altair 500 range also offers different maximum piping lengths depending on capacity.
For the 9,000 and 12,000 BTU models, Fujitsu indicates up to 20 m, or approximately 66 ft. The 18,000 and 24,000 BTU models can reach 30 m, approximately 98 ft, while the 30,000 and 36,000 BTU units allow up to 50 m, approximately 164 ft, provided the manufacturer’s specifications regarding refrigerant charge and elevation differences are followed.
This flexibility becomes very useful when an ideal outdoor location is not directly behind the indoor unit.
In the installation photographed in Lacolle, the outdoor routing remains particularly clean: we used a white line-set cover matching the home’s siding, which considerably reduces the installation’s visual impact.
This Lacolle project shows why the quality of an HVAC installation is never simply a matter of attaching two units to the wall
The outdoor unit’s location deserves careful consideration
The available space on this house included several elements to consider: a window, the meter and electrical entrance, various wall components, the side fence, the foundation, and the available ground space.
Our job is to integrate the system into this existing reality.
For this installation, the outdoor unit was positioned at a height that kept the front of the unit clear and prevented installation directly in the snow zone at ground level. The metal bracket is anchored to a suitable structural section and leaves the space beneath the outdoor unit clear.
The awning is high enough not to block ventilation.
The result is compact without being cramped.
A piping finish that is part of the job
A professional HVAC installation should not leave behind a disorganized bundle of pipes, cables, and drains running freely along the facade.
The line-set cover shown here protects and conceals the various connections while giving the project a more uniform finish. Its color blends with the white exterior siding.
This aesthetic detail also serves a practical purpose: the insulated refrigerant line and conductors are better protected against accidental contact and direct exposure.
We pay the same attention to our wall-mounted heat pump installations in Montreal, Laval, Longueuil, on the North Shore and South Shore, particularly when the units are placed on a visible facade or in a yard used daily.
Errors to avoid when carrying out a similar installation
A high-performance Fujitsu heat pump can nevertheless be compromised by poor installation.
Among the errors we systematically seek to avoid are an outdoor unit installed too close to the ground, insufficient clearance in front of the fan, an enclosure that traps the unit, improperly sized or insulated refrigerant lines, inadequate drainage, and a location that is difficult to access for maintenance.
We also verify the required electrical supply.
For the Altair 500 series, the 9,000, 12,000, and 18,000 BTU models use, according to Fujitsu documentation, a 15 A circuit breaker. The 24,000 BTU model requires 20 A, while the 30,000 and 36,000 BTU versions are rated at 30 A. All operate on a 208 to 230 V, 60 Hz, single-phase power supply.
These specifications must be confirmed based on the exact model installed before electrical work begins.
After installation: a few simple steps to protect the system
Once the heat pump is in service, the owner can help maintain good performance with a few simple habits.
The filters in the Altair 500 indoor unit are washable. Cleaning them periodically helps maintain airflow. Outdoors, the area around the unit must be kept clear of leaves, vegetation, and snow accumulation.
The canopy installed in Lacolle provides additional protection, but it does not replace a visual inspection after a major storm.
It is also best never to build a tight enclosure around the unit to hide it. A heat pump needs air—and plenty of it.
An installation adapted to the building rather than a standardized solution
At AirGreen, we regularly encounter two properties of similar size that nevertheless require different HVAC solutions.
An open-concept two-story house will not distribute air like a compartmentalized bungalow. A highly glazed south-facing façade will not have the same solar gains as a shaded property. A recently renovated house may have very different heat losses from a neighbouring building constructed at the same time.
That is why we do not reduce a Fujitsu wall-mounted heat pump installation to a formula such as “a certain number of square feet equals a certain number of BTUs.”
We examine the building, comfort habits, mechanical constraints, and available space before determining the solution.
An AirGreen project in Lacolle that will remain accessible for servicing
One of the less visible qualities of a well-planned installation is its ease of maintenance.
Here, the connections remain accessible. The outdoor unit is neither enclosed nor buried at ground level. The space in front of the fan remains clear. The system components are arranged logically.
This matters when it comes time to carry out an inspection, diagnosis, or heat pump maintenance several years after installation.
An installation should not only look good on the day we finish the project. It should also remain practical to maintain and compatible with the realities of a Quebec winter.
Fujitsu Altair 500 in Lacolle: a well-matched combination of equipment and execution
This project highlights what we look for in each of our installations: selecting suitable equipment, but above all, providing it with an environment in which it can operate properly.
The Fujitsu AIRSTAGE Altair 500 features an R-32 Inverter platform, several capacities ranging from 9,000 to 36,000 BTU class, high efficiency depending on the model, very quiet indoor operation on the smaller capacities, and an extensive range of control options.
In Lacolle, we complemented this technology with an outdoor installation adapted to the local climate: elevated unit, metal support, protective awning, open clearances, protected piping, and a clean finish on the façade.
For us, this combination is what defines a successful HVAC installation.
Whether the installation is in Lacolle, Montréal, Laval, Longueuil, on the North Shore or the South Shore, we follow the same principle: understand the building before choosing the location, respect the equipment’s technical requirements, and carry out an installation that remains functional long after our team has left.