Hitachi airHome Multi Triple Zone Wall-Mounted Heat Pump | 24,000 BTU Compressor

>A multi-zone solution designed for Quebec homes where each room has its own needs

The HITACHI airHome Multi TripleZone Wall-Mounted Heat Pump | 24,000 BTU Compressor is for homeowners who want to improve comfort in multiple rooms without multiplying outdoor units. For a multi-story house in Montreal, a family condo in Laval, a semi-detached house in Longueuil, a property on the North Shore or a residence on the South Shore, this system allows up to three zones to be air-conditioned and heated with a single outdoor compressor RAM-G24N3HAA.

At AirGreen, we recommend this type of system when comfort needs are not uniform from one room to another. A sun-exposed bedroom, a closed home office, a living room open to the kitchen, and a child's bedroom upstairs never react the same way to temperature variations. A central system can sometimes lack precision. A single wall-mounted unit may be insufficient. A multi-zone heat pump then becomes a very interesting solution, especially when it is properly sized and carefully installed.

The model presented here offers several possible combinations, such as 7 + 7 + 7, 7 + 7 + 9, 7 + 9 + 12, 9 + 9 + 12 or even 9 + 12 + 12, depending on the room configuration and the actual thermal loads of the building. This flexibility is essential in Greater Montreal, where one finds both old duplexes with closed divisions and more recent houses with open spaces.

A 24,000 BTU outdoor compressor for three well-targeted zones

The HITACHI RAM-G24N3HAA outdoor compressor is designed to power up to 3 indoor units. Its nominal capacity of 24,000 BTU in cooling and heating allows it to cover several rooms while maintaining independent comfort management. According to the available technical information, this model uses R-32 refrigerant, operates on 220V voltage, requires a minimum circuit ampacity of 19A, and accepts a maximum overcurrent protection of 35A.

For a homeowner, this data is not just numbers. It directly influences the feasibility of HVAC installation, the choice of electrical panel, the routing of refrigerant piping, and the positioning of the outdoor unit. Before any installation, our team therefore checks:

• available electrical capacity;
• the distance between indoor units and the compressor;
• load-bearing walls, soffits, ceilings, and possible passages;
• condensate drainage for each zone;
• exposure to wind, snow, and sun;
• exterior aesthetics, particularly on the facade or in narrow yards.

This analysis prevents common mistakes: poorly located compressor, overly long refrigerant lines without a clear strategy, improperly sloped drains, units placed too close to a bed or workstation, or BTU choices based solely on area without considering insulation, orientation, and actual room usage.

Why multi-zone is often preferable to three separate systems

Installing three independent systems may seem logical at first, but it involves three outdoor compressors, more space required, more outdoor noise, more wall brackets or ground bases, and often a less discreet appearance. With this HITACHI TripleZone wall-mounted heat pump, a single outdoor unit can power three zones, simplifying installation and reducing clutter around the property.

In several projects carried out by AirilgGreen in Montreal, Laval and on the South Shore, this factor was decisive. For example, in a Montreal plex with a limited backyard, the client wanted to cool two upstairs bedrooms and the main living room without filling the exterior wall with equipment. A TripleZone system allowed for grouping connections in one place, with clean line routing, a discreet finish, and better room-by-room control.

In a Boucherville home, the challenge was different: the living room received a lot of sun late in the afternoon, while the bedrooms remained cooler. By installing indoor units of different capacities, we were able to adapt comfort to each space instead of imposing a uniform temperature throughout the house. This is precisely where the multi-zone concept makes perfect sense.

Indoor units adapted to multiple configurations

The HITACHI airHome Multi range allows combining different types of indoor units, depending on the building's needs. For the TripleZone wall-mounted version, possible indoor models include the RAK-DJ07QHAA, RAK-DJ09RHAA, RAK-DJ12RHAA, RAK-DJ18RHAA, RAK-DJ24RHAA series, as well as models RAK-GJ07ilgQHAA, RAK-GJ09QHAA, RAK-GJ12QHAA, RAK-GJ18QHAA and RAK-GJ24QHAA.

Wall-mounted units are often preferred for their simplicity, efficiency, and relatively straightforward installation. They are very suitable for bedrooms, offices, living rooms, finished basements, and family rooms. Depending on the chosen configuration, indoor sound levels can drop to around 27 to 29 dB(A) on some models and settings, which is particularly relevant for bedrooms and teleworking spaces.

Louver control varies by model: vertical control can be manual, while horizontal control can be automatic. This detail matters in real life. Incorrect airflow orientation can create a feeling of discomfort even when the displayed temperature is correct. During our installations, we therefore pay particular attention to the installation height, distance from furniture, air jet orientation, and the thermal behavior of the room.

Heating performance down to -20 °C

The HITACHI airHome Multi system is designed to provide heating down to -20 °C, making it relevant for many Quebec homes. The RAM-G24N3HAA compressor maintains significant heating capacity in cold weather, with a maximum capacity indicated at 18,500 BTU/h at -15 °C and 13,000 BTU/h at -20 °C, according to the technical brochure data.

This does not mean that a multi-zone heat pump automatically replaces all existing heating systems in every home. In Montreal, Laval, Longueuil, on the North Shore and in Montérégie, we always analyze the context: insulation level, windows, air infiltration, existing heating type, occupant habits, and rooms served. In many cases, this heat pump becomes an excellent primary solution for several zones, while being able to coexist with auxiliary heating during cold peaks.

The system is also ENERGY STAR® certified and ENERGY STAR® Cold Climate, an important point for customers looking for a solution eligible for energy efficiency programs. On your AirGreen product sheet, the indicated LogisVert provincial subsidy is $1,920, with an update on November 26, 2025. As programs can evolve, we assist our customers with the information available at the time of quotation and installation.

Energy efficiency: understanding the displayed values

The system's performance data highlights excellent energy saving potential. The official brochure for the range indicates, for airHome Multi systems, a SEER2 up to 23.0 and a HSPF2-5 up to 7.85, depending on the models and configurations. For homeowners, these measurements are used to compare seasonal efficiency in cooling and heating.

In the field, savings do not depend solely on the technical sheet. They also depend on the quality of the installation, the positioning of the units, the tightness of connections, vacuum pulling, proper sizing, and daily use. A high-performance system can lose some of its advantage if the units are poorly placed or if the refrigerant lines are installed without rigor.

At AirGreen, our teams apply a precise working method: leak test, adequate vacuum pull, drainage verification, mechanical protection of lines, solid attachment of the outdoor unit, respected clearances, and clear explanation of operation to the client after installation. This rigor is as important as the choice of brand.

What airHome Multi technology changes in daily use

Three rooms, three settings, a single comfort logic

One of the great advantages of a multi-zone heat pump is independent room management. Each indoor unit can be controlled separately, with its own set point, fan speed, and settings. Some zones can be turned off while others remain in operation.

Concretely, this allows cooling a bedroom before night without over-air conditioning the living room, heating an office during working hours without unnecessarily heating an unused room, or maintaining stable comfort in a main living area while bedrooms remain at a different temperature.

This management is particularly useful for:

• two-story houses;
• condos with large windows;
• Montreal plexes with closed rooms;
• intergenerational homes;
• teleworking spaces;
• homes where occupants do not have the same temperature preferences.

Air quality: filtration, Mold Guard and FrostWash

Comfort is not limited to temperature. The HITACHI airHome Multi range integrates functions geared towards indoor air quality, a topic of increasing importance in well-insulated homes.

The PM2.5 activated carbon air purifier filter helps reduce fine particles and contributes to deodorizing the room. The brochure mentions the elimination of 99% of PM2.5 particles after a determined operating period. On certain types of units, the ViroilgSense S filter is also associated with inhibiting viruses, bacteria, and molds according to tests indicated by the manufacturer.

The Mold Guard function helps limit unpleasant odors by forcing the drying of internal components after a cooling or dehumidification operation. This is a very useful detail during humid periods, especially in Montreal and Montérégie, where humidity can quickly create a feeling of heavy air in poorly ventilated homes.

Hitachi's proprietary FrostWash technology uses a freeze-and-thaw process to clean the heat exchanger coil and help maintain good airflow over time. For the customer, this does not replace professional HVAC maintenance, but it helps keep the unit cleaner between service visits.

Connectivity and control: Optional WiFi and airCloud Go

WiFi is indicated as optional on this product, with the airCloud Go interface available depending on the configuration. For some clients, this option quickly becomes a practical advantage: remote programming, temperature adjustment before returning home, usage tracking, and better schedule management.

We often recommend this option to homeowners with variable schedules, families who only use certain rooms at certain times of the day, or clients who own a second home on the North Shore or South Shore. Good control allows the heat pump to be used more intelligently, without letting it run unnecessarily in unoccupied rooms.

Certain units may also be compatible with an optional airPoint Room H700 wall thermostat or 5-wire connectivity with a third-party thermostat, depending on the functional limits indicated by the manufacturer. Before suggesting this avenue, we always verify the client's expectations, as not all advanced functions are necessarily accessible with a third-party thermostat.

Installation: The details that make a difference

A TripleZone HVAC installation requires more coordination than a simple wall-mounted unit. It needs three indoor locations, three piping routes, three drains, electrical and refrigerant connections, and an outdoor location that respects clearances and facilitates future service.

In a typical project in Longueuil, for example, we once had to contend with a finished basement, a narrow stairwell, and a facade where the client wanted no visible lines. The solution involved grouping the passages at the back, using a discreet vertical routing, protecting the lines in a clean conduit, and adjusting the unit positioning to ensure good air distribution without compromising interior aesthetics.

There are many mistakes to avoid:

1. Choosing BTU solely based on area without considering windows, orientation, and insulation.
2. Installing a unit too close to a bed or sofa, creating direct discomfort.
3. Neglecting the drain slope, which can cause water backup.
4. Placing the compressor too close to a wall or obstruction, reducing airflow.
5. Forgetting about maintenance access, complicating future interventions.
6. Underestimating the importance of vacuuming, essential for system reliability.

This is why we emphasize a thorough evaluation before proposing a final configuration. A good multi-zone system is always the result of a well-thought-out technical choice, not just a brand choice.

Warranty and Peace of Mind

The AirGreen spec sheet indicates a 10-year compressor, 10-year parts, 0-year labor warranty, with the possibility of additional warranty coverage. The Hitachi brochure also mentions various manufacturer protections, including a standard warranty and extended options depending on registration, applicable conditions, and available upgrades.

For customers, it's important to distinguish between parts warranty, compressor warranty, and labor warranty. A part might be covered by the manufacturer, but intervention, diagnosis, travel, and labor depend on the installer's conditions and the chosen options. At AirGreen, we explain these elements clearly during the quotation process to avoid any confusion.

We also offer HVAC maintenance options to help preserve system performance. Regular maintenance includes checking the condition of filters, coils, drains, connections, heating and cooling operation, as well as the general cleanliness of the units. For a TripleZone installation, this step is particularly important, as each indoor unit has its own use and rate of fouling.

For which type of customer is this model most relevant?

The HITACHI airHome Multi TripleZone Wall-Mounted Heat Pump | 24,000 BTU Compressor is very well suited for homeowners who want to serve three small to medium-sized rooms with an efficient, clean, and flexible solution. It is particularly interesting when the rooms are not all used at the same time, or when occupants want to control bedrooms and living areas separately.

We often consider it in the following scenarios:

• two bedrooms and a living room;
• three upstairs bedrooms;
• a living room, an office, and a master bedroom;
• a high-end rental unit;
• a condo with multiple closed zones;
• a house without existing ductwork;
• a property where outdoor space is limited.

For large open-plan areas or higher heating needs, a different BTU combination or model might be preferable. This is precisely AirGreen's role: to recommend a solution adapted to the building, not just to sell the product displayed on a spec sheet.

Why choose AirGreen for a HITACHI TripleZone heat pump?

AirGreen specializes in residential and commercial HVAC solutions in Greater Montreal. We understand the realities of buildings in Montreal, Laval, Longueuil, the North Shore, the South Shore, and the Montérégie region: old brick walls, limited rear access, condos with co-ownership rules, electrical panels to check, aesthetic requirements, outdoor noise to control, and grant applications to prepare correctly.

Our approach is based on transparent pricing, meticulous installation, experienced refrigeration technicians, $5,000,000 in liability insurance, and structured after-sales service. Before starting work, we send a clear final offer. During installation, we protect the premises, validate technical details, and ensure a clean finish. After installation, we explain how the system works, the modes to use, filter maintenance, and good seasonal practices.

The HITACHI airHome Multi TripleZone Wall-Mounted Heat Pump | 24,000 BTU Compressor is a serious solution for homeowners who want precise comfort in three zones, good energy efficiency, modern technology, and durable installation. To get a quote, validate the ideal configuration, or compare this option with other multi-zone systems, contact AirGreen now. Our team will help you choose the best HVAC solution for your property in Montreal, Laval, Longueuil, on the North Shore or the South Shore.