In Clarenceville, a FUJITSU installation designed to keep the outdoor unit off the ground and withstand the realities of Quebec winters
In Clarenceville, in Montérégie, we installed a FUJITSU AIRSTAGE ORION XLTH+ on a brick home where the outdoor unit’s location required a particularly careful approach. The photo taken during our work shows a configuration that effectively illustrates several essential aspects of an HVAC installation suited to Quebec: a unit mounted high on sturdy wall brackets, substantial clearance beneath the condenser, piping directed toward the building, and visible overhead protection above the unit.
This project was therefore not simply a matter of mounting a condenser against a façade.
In Clarenceville, as elsewhere in Montérégie, a low-temperature heat pump must withstand very different conditions over the course of a single year: heat and humidity in summer, rain, freeze-thaw cycles, snow, and winter temperatures that can become particularly severe. The outdoor location must be designed accordingly.
The FUJITSU ORION XLTH+ was particularly well suited to this setting. This range is designed to operate in heating mode down to -30 °C, uses R-32 refrigerant, features an Inverter compressor, and has a base pan heater intended for cold climates. FUJITSU documentation lists three capacities in this family: 09KTAP1, 12KTAP1, and 15KTAP1.
An outdoor unit installed on wall brackets rather than at ground level
One of the most visible elements of this installation in Clarenceville is the outdoor unit mounting.
We mounted the heat pump on two triangulated metal wall brackets, firmly anchored to the structure. Supports are positioned beneath the condenser feet to create a stable installation while keeping the unit well above ground level.
This height is not merely aesthetic.
In winter, the space beneath a heat pump becomes particularly important for several reasons:
- allow water from defrost cycles to drain;
- reduce the risk of ice quickly reaching the underside of the unit;
- reduce exposure to snow accumulation;
- keep the air intakes clear;
- improve access for maintenance;
- preventing a snowbank from blocking part of the outdoor heat exchanger.
A heat pump designed to operate at very low temperatures must also be installed so that it can genuinely take advantage of this capability.
Installing a unit rated to operate down to -30 °C almost at ground level, then allowing snow to surround it in January, would directly undermine that objective.
The photo reveals an installation designed around an existing brick wall
The façade of this residence is made of brick, with several pipes and cables already present on the wall.
This is precisely the kind of situation where planning matters.
We must identify a location that allows for:
- proper mechanical fastening;
- a logical refrigerant line route;
- access to the connections;
- sufficient clearance for the fan;
- a reasonable distance from existing elements;
- future maintenance without unnecessary disassembly;
- an installation that is visually consistent with the façade.
The photo also shows the ladder used during the work. This detail illustrates a reality that is often invisible in a final photo: the HVAC installation involves several stages of work at height, measuring, fastening, connecting, and finishing before the appliance can be commissioned.
A protective cover visible above the condenser
On the FUJITSU unit installed in Clarenceville, a protective cover placed above the appliance is clearly visible.
In a region subject to snow and precipitation, managing what falls directly onto the unit may be part of the installation considerations. However, this type of feature must always comply with the clearances required by the manufacturer: protecting a heat pump must never mean enclosing its heat exchanger or preventing air circulation.
This is a principle we apply consistently.
An outdoor accessory should complement the installation, not interfere with the equipment’s operation.
Why the space in front of the fan is so important
The outdoor unit’s immense front fan is clearly visible in the photo.
This fan plays a fundamental role in heat exchange. It must be able to move a large volume of air through the outdoor heat exchanger.
That is why we avoid positioning the unit:
- facing a nearby wall;
- in a completely enclosed space;
- behind a solid guardrail;
- under a structure that is too low;
- in a location where the expelled air could be immediately drawn back in.
At this installation in Clarenceville, the fan remains largely exposed to the outdoors, allowing the unit to breathe properly.
FUJITSU ORION XLTH+: why this wall-mounted heat pump is particularly interesting for a Quebec residence
Heating down to -30 °C
The feature that immediately stands out about the FUJITSU AIRSTAGE ORION XLTH+ is its heating operating range.
FUJITSU specifies a range of -30 °C to 24 °C for the three models in the range presented in its technical data sheet.
For an installation in Clarenceville, this feature is directly relevant.
We are not talking here about an air conditioner to which a heating function was simply added for mild temperatures. The series was designed from the outset for cold-climate applications.
Heating capacity that remains available as the mercury drops
The minimum operating temperature, however, tells only part of the story.
Two heat pumps can both advertise low-temperature operation and offer very different capacities once temperatures reach -20 °C or -25 °C.
The FUJITSU data sheet provides useful information on this subject.
At -26 °C, the maximum heating percentage indicated relative to the reference nominal capacity is:
- 147 % for the 09KTAP1;
- 128 % for the 12KTAP1;
- 116 % for the 15KTAP1.
Even at -30 °C, the documentation indicates 113%, 103%, and 101%, respectively.
These figures help explain why a heat pump such as the ORION XLTH+ can be a serious residential heating solution.
Three capacities, with sizing that must remain precise
The series presented by FUJITSU includes three configurations:
- 09KTAP1: 9,000 BTU/h nominal in cooling and 12,000 BTU/h nominal in heating;
- 12KTAP1: 12,000 BTU/h nominal in cooling and 15,300 BTU/h nominal in heating;
- 15KTAP1: 14,500 BTU/h nominal in cooling and 17,400 BTU/h nominal in heating.
The photo from Clarenceville makes it possible to identify the FUJITSU AIRSTAGE family and the R-32 refrigerant, but it does not make it possible to read the complete model reliably enough from the rating plate. We therefore avoid inventing the exact capacity of this installation.
This is also a good illustration of how we work: BTUs must be confirmed based on the actual model and the building’s sizing, not guessed from the apparent size of the condenser.
Surface area alone is not enough to choose the BTUs
A quick calculation based solely on square footage can be misleading.
To choose a wall-mounted heat pump in Clarenceville, we need to consider various factors:
- actual area served;
- insulation quality;
- age of the building;
- number and orientation of windows;
- sun exposure;
- ceiling height;
- room layout;
- presence of stairs or an open-concept area;
- air infiltration;
- existing heating system;
- desired comfort level in winter.
A very well-insulated property may have very different needs from a house of the same size built several decades earlier.
Efficiency levels that place the ORION XLTH+ among highly efficient systems
Depending on capacity, FUJITSU documentation indicates SEER2 values of:
- 33.5 for the 09KTAP1;
- 31.5 for the 12KTAP1;
- 28.7 for the 15KTAP1.
The HSPF2 Region V values are 11.5, 11.3, and 10.7, respectively.
The documentation also identifies these configurations with the ENERGY STAR, ENERGY STAR Cold Climate, and ENERGY STAR Most Efficient ratings.
These efficiency levels are particularly relevant for a homeowner who wants to use their heat pump not only as an air conditioner in summer, but also as their primary or significant heating system during winter.
Inverter technology: capacity is not fixed
A major advantage of the ORION XLTH+ is its Inverter compressor.
Instead of operating exclusively according to an on-off logic at full capacity, the machine can adjust its operation based on demand.
Let’s take the 12KTAP1 configuration as an example.
Although it is nominally rated at 12,000 BTU/h for cooling, FUJITSU indicates a range of 3,100 to 17,300 BTU/h.
In heating mode, the range extends from 4,500 to 27,300 BTU/h.
This modulation is particularly useful in Quebec, where needs vary greatly between a cool October evening and a January night.
R-32: a detail clearly visible on the Clarenceville unit
The label R32 appears directly beneath the AIRSTAGE logo on the photographed outdoor unit.
The ORION XLTH+ generation therefore uses R-32 refrigerant.
In its documentation, FUJITSU indicates a global warming potential of 675 for R-32, compared with 2,088 for R-410A, which corresponds to a 68% reduction based on the reference used by the manufacturer.
This represents a significant change compared with several previous generations of residential heat pumps using R-410A.
Base pan heater: a component particularly relevant to Clarenceville
FUJITSU integrates a base pan heater designed for extremely cold climates into the outdoor unit.
Why is this important?
In heating mode, the outdoor heat exchanger can accumulate frost. The heat pump must periodically enter a defrost cycle to remove this buildup.
The resulting water flows down to the bottom of the unit.
When the temperature is deeply negative, this water can quickly refreeze. The base pan heater helps manage this condition.
In this Clarenceville installation, the elevated wall-mounted installation and the machine's low-temperature design therefore work toward the same goal: enabling winter operation better suited to our climate.
1/4 in. and 3/8 in. piping must be used
The three ORION XLTH+ systems in this range use:
- 1/4 in. for the liquid line;
- 3/8 in. for the gas line.
FUJITSU also specifies a minimum piping length of 10 ft, a maximum length of 66 ft, and a maximum vertical difference of 49 ft. The indicated precharge covers approximately 49 ft of piping.
These figures are particularly important when replacing a system.
A common mistake is to assume that two heat pumps with similar capacities automatically use the same lines.
That is not necessarily the case.
Before reusing existing piping, we must check:
- its diameters;
- its physical condition;
- its cleanliness;
- its history;
- compatibility with the new system;
- the manufacturer's requirements.
Electrical requirements vary according to capacity
The series operates at 208 to 230 V, single-phase, 60 Hz.
The protection devices specified by FUJITSU are:
- 15 A for the 09KTAP1;
- 20 A for the 12KTAP1;
- 20 A for the 15KTAP1.
For every heat pump installation, we must therefore check the electrical panel and the planned circuit before considering the job complete.
Electricity should never become a surprise once the condenser has already been installed on the wall.
A compact outdoor unit that must remain accessible
FUJITSU describes the ORION XLTH+ outdoor unit as compact.
Depending on the model, its external width is approximately 31 7/16 in. to 32 5/16 in. The 12KTAP1 and 15KTAP1 configurations are approximately 28 3/16 in. high and 12 3/8 in. deep.
This compact design makes installation easier in limited residential spaces.
In the photo of Clarenceville, however, we see another important principle: even though the unit is compact, we maintain access to the panels and the perimeter of the machine.
One day, a technician may need to:
- measure pressures and temperatures;
- check connections;
- inspect the electronics;
- clean the heat exchanger;
- replace a component;
- perform a diagnostic.
An installation must therefore be designed not only for the day it is commissioned, but also for the years that follow.
Quiet operation indoors and outdoors
The ORION XLTH+ also offers impressive acoustic performance.
For the indoor unit, the 09KTAP1 and 12KTAP1 configurations can go as low as 23 dB(A) in quiet mode. The 15KTAP1 configuration goes as low as 26 dB(A).
The published outdoor sound levels range from approximately 44 dB(A) to 51 dB(A), depending on the model and operating mode.
For a wall-mounted installation like the one in Clarenceville, mechanical stability therefore becomes important.
A quiet heat pump should not become noisy because its mounting unnecessarily transmits vibrations to the structure.
Built-in Wi-Fi for comfort management
FUJITSU also provides built-in Wi-Fi connectivity with control and monitoring through the AIRSTAGE platform.
For a homeowner, this makes it easier to manage:
- temperature;
- periods of absence;
- returning home;
- seasonal adjustments;
- the heat pump’s daily operation.
The documentation also mentions various control and integration options, including BACnet and Modbus for certain more advanced applications.
Financial assistance: the model number matters more than the commercial name
The systems in this series are presented in FUJITSU documentation with certifications associated with cold climates.
For a homeowner looking for a heat pump subsidy in Quebec, this information may be relevant.
However, one important rule should be kept in mind: eligibility and the amount of financial assistance must be verified based on the exact combination of the indoor and outdoor units and the criteria of the program in effect.
We therefore avoid automatically associating a specific amount with the simple mention “FUJITSU ORION XLTH+”.
This Clarenceville project illustrates several mistakes we seek to avoid.
A heat pump installed too low
This is one of the most problematic mistakes in our climate.
A unit that operates very well in October can become difficult to operate in January when snow and ice reach the bottom of its heat exchanger.
Here, the wall bracket creates significant clearance beneath the unit.
An improvised mounting
The compressor and fan generate normal vibrations.
The support must therefore be sturdy, properly secured, and suited to the weight of the equipment. The triangulated geometry visible in the Clarenceville installation helps create a rigid base.
A cover that blocks airflow
Adding a roof or protection without considering clearances can be counterproductive.
Any element added around the heat pump must respect the required airflow.
Piping left exposed without planning
Refrigerant lines and cables must be installed neatly, protected, and accessible when necessary.
An oversized machine “just to be sure”
Bigger does not automatically mean better.
Sizing must match the building and its actual needs.
Maintenance overlooked at the time of installation
The best time to think about maintenance access is before everything is secured in place.
We make sure not to turn a simple installation today into a complex service call five or ten years from now.
AirGreen in Clarenceville: equipment performance begins with installation quality
This installation of a FUJITSU AIRSTAGE ORION XLTH+ wall-mounted heat pump in Clarenceville perfectly illustrates our approach: adapting the project to the building and climate rather than simply looking for the quickest place to mount the unit.
The elevated wall-mounted setup addresses the realities of winter. The fan remains unobstructed. The unit is accessible for maintenance. The system features an Inverter compressor, R-32 refrigerant, a base pan heater, and heating operation down to -30 °C.
The final result therefore rests on two complementary elements: a heat pump designed for cold climates and an HVAC installation designed to allow that heat pump to operate properly.
At AirGreen, this combination is what interests us.
We install wall-mounted and central heat pumps throughout Greater Montréal and several surrounding areas, including Montréal, Laval, Longueuil, the North Shore, the South Shore, and Montérégie. Every project has its own particularities: brick walls, balconies, narrow yards, electrical constraints, old lines, limited space, or specific heating needs.
Our role is to transform these constraints into a clean, accessible, and technically coherent installation.
In Clarenceville, the brick façade, elevated mounting, and winter requirements dictated a significant part of our work. The FUJITSU ORION XLTH+ provided us with a platform particularly well suited to this objective.