HITACHI | Ducted - Heat Pump | 24000 BTU
SEER2 (Seasonal Air Conditioning Efficiency)
HSPF2 (Seasonal heating efficiency)
EER2 (Instantaneous efficiency in air conditioning)
COP at -8 °C (Heating energy efficiency)
A Discreet Ducted Solution for Air Conditioning and Heating Without Compromising Interior Design
In many homes in Montreal, Laval, Longueuil, the North Shore, and the South Shore, HVAC comfort is no longer limited to installing a visible wall-mounted unit in a main room. More and more homeowners are seeking a more discreet solution, better integrated into the interior architecture, capable of providing stable temperatures without altering the appearance of the walls. It is precisely in this context that the HITACHI 24,000 BTU ducted heat pump, indoor model RAD-GJ24QHAA with outdoor unit RAM-G24N3HAA, becomes a particularly attractive option.
At AirGreen, we recommend this type of equipment when the project requires more meticulous integration: suspended ceiling, central corridor, open-plan area with short duct distribution, residential extension, high-end condo, finished basement, or commercial space where aesthetics are as important as performance. The principle is simple: the indoor unit is concealed, often in a ceiling or technical space, and then air is distributed through discreet grilles. The result: uniform comfort, without a visible wall-mounted appliance in the room.
This HITACHI model offers a nominal capacity of 24,000 BTU, operates on R-32 refrigerant, is powered by 220 V, uses 1/4 – 1/2 in piping, and stands out with an indoor sound pressure level advertised at 29 / 40 dB(A) depending on usage conditions. Its indoor size of 35.4 x 28.3 x 10.6 in allows for well-planned installation in various residential or commercial configurations. The outdoor unit, more compact than one might imagine for this capacity, measures 33.5 x 11.7 x 31.5 in and has an outdoor sound level of 54 dB(A).
Why Choose a Ducted Heat Pump Over a Traditional Wall-Mounted Unit
A wall-mounted heat pump remains an excellent choice in many projects, but it is not always ideal. In some properties, available wall space is limited, ceilings are better suited for air distribution, or the client wishes to maintain a very clean interior finish. A ducted heat pump meets these needs with a different approach: it hides the main equipment while diffusing air more subtly.
During a recent project on the South Shore, a homeowner was completely renovating their ground floor. The space included an open kitchen, a living room, a dining room, and a corridor leading to two small rooms. Installing a wall-mounted unit in the living room would have worked technically, but the location would have created a direct air draft towards the seating area. After analysis, our team proposed a ducted solution with a more balanced distribution. Grilles were placed to avoid uncomfortable drafts while ensuring a constant temperature in the open-plan area.
This kind of detail makes all the difference. An HVAC installation is not just about choosing a BTU capacity. It's necessary to consider ceiling heights, insulation, solar orientation, humidity levels, airflow, available space for ducts, access for maintenance, and refrigerant piping routing.
Performance Adapted to the Quebec Climate
The product sheet indicates a heating capacity down to -20 °C, an important factor for Quebec homeowners who want to reduce their dependence on traditional electric heating. For the outdoor model RAM-G24N3HAA, the HITACHI brochure indicates a nominal cooling capacity of 24,000 BTU/h, a nominal heating capacity of 24,000 BTU/h, a heating operating range of -20 °C to +24 °C, as well as a maximum heating capacity at -15 °C that can reach 18,500 BTU/h in the ducted configuration.
This point is essential: a heat pump should never be evaluated solely on its nominal capacity. In Quebec, we always check performance at low temperatures, especially when the equipment is intended to support heating for a good part of the winter. In many homes in Montreal and Laval, a well-selected heat pump can significantly reduce the use of electric baseboards during autumn, spring, and many winter days. However, sizing remains crucial, as poorly chosen capacity can lead to short cycles, uneven comfort, or unnecessary consumption.
An Invisible Indoor Unit, Yet Technically Demanding
The HITACHI brochure presents the airHome Ducted unit as a 7,000 to 24,000 BTU/h solution, designed to preserve interior design integrity. It also mentions the presence of an integrated refrigerant leak sensor, FrostWash technology, sound pressure that can go down to 29 dB(A), as well as an optional airCloud Go interface.
For a client, these features may seem simple. For an installer, they imply rigorous planning. A ducted unit must be installed with particular attention to several elements:
- sufficient service access for future maintenance;
- condensate drainage with adequate slope or suitable pump;
- duct insulation to prevent condensation;
- supply and return grilles well positioned;
- static pressure respected according to configuration;
- complete vacuum pull before startup;
- functional tests in heating and cooling;
- airflow calibration to avoid overly cold or hot spots.
At AirGreen, we regularly see ducted installations done too quickly by other contractors: ducts that are too long, maintenance access blocked by drywall, undersized air return, drainage pipe without sufficient slope, or unit placed in a space that amplifies noise. These are avoidable errors, but they require experience.
Interesting Energy Efficiency and a LogisVert Grant of $1,920
This model is designated as ENERGY STAR® and ENERGY STAR® Cold Climate, with ENERGY STAR ID 3799345 and AHRI number 216097710. It is also associated with a provincial LogisVert grant of $1,920, updated on your product sheet on February 8, 2026. For many clients, this financial aid concretely changes the project's calculation, especially when comparing a ducted solution to a simpler wall-mounted installation.
The sheet also mentions the following values: SEER2 18.030, HSPF2 9.515, EER2 11.720 and COP at -8 °C of 2.23. This data allows for evaluating the system's energy performance in cooling and heating. In practice, we always explain to clients that real efficiency also depends on the quality of the installation, building insulation, outdoor unit location, clearance around the equipment, and annual maintenance.
An efficient heat pump poorly installed will never deliver its full performance. Conversely, a well-chosen and well-installed equipment can offer a noticeable difference in daily comfort, especially in homes where certain rooms were previously more difficult to cool or heat.
What Our Team Checks Before Recommending This HITACHI Model
The Actual Capacity Required for the Space
A 24,000 BTU unit can be perfectly suited for an open-plan area, a well-configured entire floor, a commercial space, or a residential area with short duct distribution. But it should not be chosen simply because it seems more robust. At AirGreen, we evaluate the area, air volume, sun exposure, property age, window quality, insulation, auxiliary heating needs, and usage habits.
In a home in Longueuil, for example, we have already recommended not oversizing a ducted solution, even if the client initially wanted a higher capacity. After inspection, the recent insulation and room layout allowed for a more balanced configuration with fewer risks of short cycles. The result was more comfortable and quieter.
Piping and Drainage Routing
The product sheet indicates 1/4 – 1/2 in piping, which must be considered from the quotation stage. In existing homes, the passage of refrigerant lines can be more complex than in new construction. We sometimes have to bypass a beam, pass through a technical space, protect outdoor lines, or choose a compressor location that respects both technical constraints and property aesthetics.
Drainage is just as important. A ducted unit produces condensation during air conditioning. If the drainage is poorly designed, the client may experience odors, leaks, safety shutdowns, or ceiling damage. That's why our team plans the drainage even before confirming the final location of the indoor unit.
Sound Comfort
With an indoor sound level advertised at 29 / 40 dB(A), this HITACHI ducted heat pump can offer discreet operation when the installation is well designed. But perceived noise also depends on the ducts, grilles, airflow speed, and ceiling structure. A grille that is too small can create a whistling sound. A poorly secured duct can transmit vibrations. A unit placed too close to a bedroom without acoustic treatment can be more audible than expected.
Our approach is to reduce these risks from the design stage. We prefer to clearly explain the constraints to the client before installation rather than correcting a problem afterward. This transparency is part of our way of working.
Smart Options and Long-Term Maintenance
The HITACHI brochure highlights several interesting features, including the optional airCloud Go interface, which allows remote system control, operation programming, and energy usage tracking. It also mentions FrostWash technology, designed to clean the coil through a freeze-thaw process, as well as the Mold Guard function, which helps reduce odors and mold formation by drying internal components after air conditioning or dehumidification operation.
These functions do not replace professional HVAC maintenance, but they contribute to maintaining a better level of internal cleanliness. For a ducted unit, maintenance is particularly important because the appliance is less visible daily. The client does not always notice dust accumulation, the condition of the drain, or a gradual decrease in airflow. We therefore recommend periodic checks, especially in homes with pets, renovation work, allergic occupants, or intensive summer use.
R-32, Safety, and Integrated Leak Sensor
R-32 refrigerant is increasingly present in new generations of heat pumps. It offers good energy efficiency but requires installation in accordance with best practices. The HITACHI brochure indicates that the indoor units of the series integrate an R32 leak sensor, with LED alarm and audible warning depending on the configuration. For a ducted installation, this feature is relevant because the unit can be concealed in a ceiling or technical space.
At AirGreen, we place great importance on commissioning: leak test, vacuum pull, connection verification, drainage control, pressure validation, and clear explanation to the client. A good installation begins before startup and is confirmed by serious tests.
Warranty and Peace of Mind
The product sheet indicates a warranty of 10 years on the compressor, 10 years on parts, and 0 years on labor, with the possibility of additional warranty. The HITACHI brochure also presents various manufacturer protections, including a standard warranty and extended options depending on registration and installation conditions. For residential clients, it is important to clearly understand what is covered by the manufacturer, what falls under labor, and what options can be added to reduce long-term risks.
At AirGreen, we explain these elements before purchase. We prefer that the client knows exactly what they are getting: the equipment, installation, available warranties, control options, potential subsidy, and recommended maintenance conditions.
Common Mistakes to Avoid with a Ducted Heat Pump
A ducted solution is elegant, but it doesn't forgive poor planning. The most common mistakes we observe are:
- choosing the indoor unit's location too late, after ceiling finishing;
- neglecting service access, which complicates maintenance or repairs;
- installing overly restrictive ducts, reducing airflow;
- placing grilles in the wrong location, creating drafts or dead zones;
- underestimating drainage, especially in finished ceilings;
- ignoring low-temperature performance, which is essential in Quebec;
- comparing only the price, without comparing installation quality.
A well-installed ducted heat pump can provide remarkable comfort. Poorly installed, it can become difficult to maintain, noisy, or inefficient. This is why the chosen contractor matters as much as the brand of the unit.
Why trust AirGreen for this type of HVAC installation
AirGreen installs and maintains HVAC systems in Greater Montreal, including Montreal, Laval, Longueuil, on the North Shore, the South Shore, and in Montérégie. Our team understands the typical constraints of Quebec homes: finished ceilings, renovated basements, old duplexes and triplexes, recent condos, open-concept homes, extensions, commercial premises, and multi-unit buildings.
For each project, we prepare a clear offer before work begins. We analyze the best route for lines, electrical needs, compressor location, condensate management, mechanical protection, required clearances, and control options. This method reduces surprises and ensures a clean, functional, and durable result.
The HITACHI Ducted 24,000 BTU is not just a device to install: it's a comfort solution to be intelligently integrated into a building. It is particularly suitable for clients who want efficient air conditioning and heating, but who refuse to compromise the interior appearance of their space.
Conclusion: a discreet, high-performance heat pump well-suited for meticulous projects
The HITACHI | Ducted - Heat Pump | 24000 BTU is a serious option for homeowners looking for a discreet, efficient HVAC solution compatible with the demands of the Quebec climate. With its ducted format, R-32 operation, ENERGY STAR® Cold Climate compatibility, heating capacity down to -20 °C, announced provincial subsidy of $1,920, and smart options, it meets a specific need: providing comfort without a visible wall unit.
For a clear quote, a personalized analysis, or a recommendation tailored to your property, contact AirGreen today. Our team will assist you with the selection, installation, and maintenance of your HITACHI ducted heat pump in Montreal, Laval, Longueuil, on the North Shore and South Shore.