In Saint-Damase, a compact installation where the brick wall, balcony, and connections required particularly careful execution
In Saint-Damase, we completed a new FUJITSU AIRSTAGE ORION XLTH wall-mounted heat pump installation in an outdoor configuration that perfectly illustrates the importance of technical details in HVAC. In the project photo, the FUJITSU outdoor unit is installed directly against a brick façade, beneath a balcony or slab structure, on an elevated metal bracket. The space is relatively tight: the masonry, the ceiling above the unit, the nearby window, the refrigerant lines, and the electrical disconnect all had to be taken into account.
This type of project requires more than simply securing the condenser. It is necessary to consider airflow, the machine’s behavior in winter, water drainage during defrost cycles, vibrations transmitted to the building, clearances around the unit, and the possibility of a technician accessing it several years later.
At AirGreen, we approach this type of HVAC installation in Saint-Damase by considering the building as a whole. The result must be compact without being cramped, accessible without unnecessarily occupying outdoor space, and robust enough to withstand several Québec seasons.
A FUJITSU outdoor unit installed at an elevated height rather than placed on the ground
One of the most visible details of this project is the metal wall bracket supporting the heat pump.
We chose to elevate the unit rather than install it directly at ground level. This configuration notably maintains clearance beneath the condenser, which is particularly useful during winter.
In the Saint-Damase area, as elsewhere in Montérégie, snow, ice, and water from defrosting can become significant factors. An outdoor unit installed too close to the ground can gradually become surrounded by a buildup of compacted snow or ice.
By keeping it elevated, we facilitate:
- winter clearance around the condenser;
- drainage of water beneath the unit;
- access to the connections;
- cleaning around the heat pump;
- preserving floor space;
- better protection for the unit against certain seasonal accumulations.
However, it is not enough to place a machine on two brackets. The support must be properly sized, securely fastened, and capable of keeping the unit stable despite its weight and the compressor’s normal vibrations.
A brick façade requiring proper fastening
In this installation, the support is attached to a masonry façade.
This seems simple when looking at the finished photo, but the nature of the wall directly influences the installation method.
An outdoor heat pump can weigh several dozen kilograms. The FUJITSU technical data sheet indicates an outdoor weight of approximately 39 kg (86 lb) for the ORION XLTH 9 000, 12 000, and 15 000 BTU models, while the 18 000 and 24 000 BTU models are listed at approximately 53 kg (117 lb).
The bracket must therefore transfer this load stably to the building structure.
We must also take vibrations into account. Improper fastening can turn weak mechanical vibrations into perceptible structural noise inside the home.
That is why the fastening work must never be treated as a secondary detail.
Anti-vibration pads visible beneath the unit
In the photo, we can also distinguish anti-vibration elements between the unit’s feet and the metal support.
They play a subtle but important role.
A heat pump’s compressor and fan naturally generate small vibrations. When a unit is directly connected to a metal structure that is itself attached to the building, these vibrations can be transmitted to the wall.
Using decoupling elements helps reduce this transmission.
In a project where the unit is located near a window or living space, we pay particular attention to this point.
An installation protected by the building, without enclosing the machine
The heat pump is located beneath an overhead structure that provides some protection from direct precipitation.
This type of location can be advantageous, but it is important not to confuse “protected” with “enclosed.”
An outdoor unit must move a great deal of air. Its coil must be able to receive enough ambient air, and the fan must be able to exhaust air without creating significant recirculation.
We must therefore maintain the required clearances around the machine, particularly on the coil and air-discharge sides.
In an alcove that is too enclosed, some of the expelled air could return to the unit. The system would then be forced to operate under less favorable conditions.
The visible placement at this Saint-Damase job site therefore represents a balancing act: making use of the space available beneath the structure while keeping the heat pump sufficiently clear.
Why the FUJITSU AIRSTAGE ORION XLTH is particularly relevant for an installation in Quebec
A heat pump designed to operate in heating mode down to -26 °C
FUJITSU documentation identifies the AIRSTAGE ORION XLTH as a single-zone wall-mounted range in the H series designed for heating in cold climates down to -26 °C.
This information is particularly important for a homeowner who wants to use their heat pump not only as a wall-mounted air conditioner, but also as a heating system for much of the winter.
In Greater Montreal, in Saint-Damase, on the South Shore, in Longueuil, Laval, or on the North Shore, low-temperature performance is one of the fundamental criteria when comparing heat pumps.
Good summer efficiency is valuable, but in Quebec we must also know how the unit performs when the thermometer drops well below zero.
Several capacities to adapt the unit to the building
The ORION XLTH range presented in the technical data sheet includes several capacities.
The nominal cooling capacities are listed as:
- 9,000 BTU/h;
- 12,000 BTU/h;
- 14,500 BTU/h for the version marketed in the 15,000 class;
- 18,000 BTU/h;
- 22,000 BTU/h for the version marketed in the 24,000 class.
The stated heating capacities are 12,000, 16,000, 18,000, 21,600, and 25,200 BTU/h, respectively.
This variety allows us to tailor the selection to the home’s actual load rather than routinely installing the largest machine available.
Why proper sizing remains essential
It is tempting to think that a larger heat pump will necessarily heat better.
This reasoning is incomplete.
A heat pump must be sized according to:
the actual area served, the layout of the rooms, ceiling height, insulation, the building’s orientation, windows, air infiltration, and the actual heating and cooling needs.
Excessive capacity can contribute to less favorable cycles and less uniform comfort. Insufficient capacity, on the other hand, risks leaving the machine operating near its limit during the most demanding periods.
At AirGreen, we therefore seek the right balance for the building.
Interesting heating performance when the cold becomes intense
The FUJITSU technical data sheet provides particularly useful information on the maximum capacity available at low temperatures.
At -26 °C, the indicated maximum heating percentages are 127% for the 9,000 BTU model, 102% for the 12,000 BTU model, 109% for the 15,000 BTU model, 106% for the 18,000 BTU model, and 80% for the 24,000 BTU model; these values are expressed relative to the nominal capacity used by Fujitsu in its table.
This information mainly shows why we examine performance curves at low temperatures instead of looking only at the number of BTUs included in the system name.
Inverter technology: modulation rather than simple on-off operation
Inverter technology is one of the features of the ORION XLTH range. Fujitsu indicates that the system adjusts its performance according to demand to promote rapid adjustment and more consistent comfort.
In practical terms, the heat pump does not always need to operate at full capacity.
When the room approaches its setpoint temperature, the compressor can modulate its operation.
This modulation capability helps maintain a more stable indoor temperature and limit the significant fluctuations associated with older systems that operate only in on-off mode.
High energy efficiency across the entire range
The FUJITSU technical data sheet presents VERY2 different values depending on capacity:
33,1 for the 9,000 BTU model, 30,5 for the 12,000 BTU model, 27,5 for the 15,000 BTU model, 25,5 for the 18,000 BTU model and 24,0 for the 24,000 BTU model.
The models shown in the FUJITSU table also carry the ENERGY STAR ratings indicated by the manufacturer.
For our customers comparing several wall-mounted heat pumps in Quebec, this data is very useful, but we always remind them that published performance can never replace proper sizing or adequate installation.
A clearly visible energy label on the Saint-Damase unit
In the job-site photo, the outdoor unit also has its yellow energy label directly on the front panel.
This detail is useful for the owner: regulatory and energy data make it possible to compare the equipment with other systems in the same category.
However, we recommend not basing a purchasing decision on a single value. Seasonal efficiency, actual capacity in very cold weather, noise level, sizing, and installation quality are all important.
R-32 clearly identified on the condenser
Another detail visible in the photo is the marking R32 directly on the outdoor unit.
The ORION XLTH range does indeed use R-32 refrigerant. In its documentation, Fujitsu gives R-32 a global warming potential of 675 compared with 2,088 for R-410A, which the manufacturer describes as a 68% reduction in GWP.
This transition to R-32 also changes certain aspects of the installation work.
Our procedures, tools, and methods must always be adapted to the system’s refrigerant.
Carefully insulated refrigerant lines
The photo provides a particularly detailed view of the connections at the back and side of the unit.
The insulated refrigerant lines, wiring, and route to the wall penetration are shown.
Insulating the lines is not merely an aesthetic consideration.
It helps limit unwanted heat exchange with the surrounding environment and protects the line in question against condensation under certain operating conditions.
The bends must also be made without excessively crushing the copper. Improperly formed piping can affect the operation of the refrigeration circuit.
Copper diameters vary according to the selected capacity
The FUJITSU technical data sheet specifies different pipe sizes depending on the model:
- 9,000 BTU: 1/4 in. liquid and 3/8 in. gas;
- 12,000 BTU: 1/4 in. liquid and 3/8 in. gas;
- 15,000 BTU: 1/4 in. liquid and 1/2 in. gas;
- 18,000 BTU: 3/8 in. liquid and 5/8 in. gas;
- 24,000 BTU: 3/8 in. liquid and 5/8 in. gas.
This information becomes particularly important when replacing an older heat pump.
The presence of existing lines never automatically means they are suitable for the new unit.
The diameter, length, condition, and compatibility with the model’s requirements must be checked.
Piping lengths that provide true installation flexibility
Fujitsu specifies maximum lengths of up to 25 m (82 ft) for the 9,000 and 12,000 BTU models, 30 m (98 ft) for the 15,000 BTU model, and 50 m (164 ft) for the 18,000 and 24,000 BTU models.
This flexibility is very useful when the outdoor unit cannot be positioned directly behind the indoor evaporator.
In some homes in Montreal, Laval, Longueuil, the North Shore, and the South Shore, balcony, passageway, condominium, or architectural-layout constraints precisely require a more carefully planned route.
An accessible electrical disconnect nearby
Another clearly visible element in the photo is the electrical disconnect box installed near the condenser.
For a technician, access to the unit’s electrical disconnect is essential during service or maintenance.
The series operates at 208 to 230 V, 60 Hz, single-phase. The FUJITSU specification sheet indicates a 15 A circuit breaker for the 9,000 and 12,000 BTU models and a 20 A circuit breaker for the 15,000, 18,000, and 24,000 BTU models.
The circuit must naturally be suited to the actual model installed and to the applicable electrical requirements.
Why the base pan heater really matters in Saint-Damase
Fujitsu indicates that a base pan heater designed for extremely cold climate regions is included among the features of the ORION XLTH outdoor unit.
This component is particularly important in winter.
In heating mode, frost forms on the outdoor coil. The system periodically runs a defrost cycle, which produces water.
This water must be able to drain properly from the unit’s base.
This is also one of the reasons why the clearance provided by the elevated wall bracket is advantageous in this installation.
A relatively compact outdoor unit
According to the range’s technical table, the outdoor units are approximately 799 mm wide, 632 mm high, and 290 mm deep.
This compact design is particularly useful in an installation like the one in Saint-Damase, where the condenser had to coexist with masonry, a window, an upper ceiling, and electrical services.
However, the outdoor unit’s compact size should never become an excuse for reducing the required clearances.
We always prioritize operation and accessibility before trying to place the unit excessively close to obstacles.
Outdoor sound levels and vibrations must be considered together
The Fujitsu specification sheet indicates outdoor sound levels ranging from approximately 46 to 50 dB(A), depending on the capacity and operating mode.
In practice, acoustic comfort also depends on how the unit is installed.
A relatively quiet unit can become disruptive if its vibrations are transmitted directly to a wall, especially near a bedroom or window.
That is why the support, mounting points, and vibration-dampening components are important.
Mistakes we avoid when installing an outdoor unit beneath a balcony
A project like the one in Saint-Damase helps summarize several typical mistakes to avoid:
- Installing the unit too close to the upper ceiling, unnecessarily limiting airflow.
- Mounting a bracket without considering the condenser’s actual weight.
- Neglecting vibrations transmitted to the brick wall.
- Placing the unit too low for winter conditions.
- Creating bends that are too tight in the refrigerant piping.
- Leaving the lines inadequately insulated or exposed.
- Making the electrical disconnect difficult to access.
- Forgetting about the water produced during defrost cycles.
- Positioning the service panel against a wall or obstruction.
- Choosing the capacity based solely on floor area without analyzing the building.
A professional installation is precisely about anticipating these problems before they arise.
This Saint-Damase project shows why installation matters just as much as the equipment
The FUJITSU AIRSTAGE ORION XLTH offers several features that are particularly well suited to Quebec’s climate: heating operation down to -26 °C, Inverter technology, R-32 refrigerant, a base pan heater, built-in Wi-Fi, options for long piping runs, and high efficiency depending on the selected capacity.
But none of these features can replace a good installation.
In Saint-Damase, the real challenge was making all the project components work together: the heat pump, the bracket, the brick façade, the structure above, the piping, the wiring, the disconnect switch, and the required clearances.
The final photo clearly illustrates the result: a compact outdoor unit mounted high up, connections grouped close to the wall, an accessible electrical supply, and an installation adapted to a space where every inch mattered.
At AirGreen, this is the care we apply to our wall-mounted heat pump installations in Montreal, Laval, Longueuil, on the North Shore, the South Shore, and throughout the areas we serve.
A good heat pump should provide comfort today. A good installation should also simplify operation, maintenance, and service for years to come.