GREE UNIX R32 "ADD-ON" Central Heat Pump | 4T | Coil in a Box

• BROCHURE: FRENCH
• BROCHURE: ENGLISH

A central heat pump designed for Quebec's climate, existing buildings, and well-planned projects.

At AirGreen, we've been installing central heat pumps in Greater Montreal long enough to know that a good product isn't judged solely on a spec sheet. It's judged in the field, in the middle of January, during a cold snap of -25°C , in a real home with real occupants, existing ductwork, mechanical constraints, clear expectations, and a well-defined budget.

The GREE UNIX R32 "ADD-ON" Central Heat Pump | 4 tons with a boxed coil perfectly embodies this reality. This system was designed to meet the needs of homeowners who want to drastically improve their comfort and energy efficiency without having to start from scratch or unnecessarily replace still-functional equipment.

This is a strategic choice, particularly relevant for residences and buildings in Montreal, Laval, Longueuil, the North Shore and the South Shore , where there are many existing central systems and where winters impose requirements far exceeding the North American average.

A true ADD-ON solution for modernizing without rebuilding everything

In a significant proportion of projects carried out by AirGreen, clients already own:

• an electric or gas furnace in good working order,

• a functional network of conduits,

• an old, inefficient central air conditioner or one that has reached the end of its lifespan.

In this context, replacing the entire system is not always logical, either economically or technically. This is precisely where the ADD-ON configuration with a boxed coil becomes truly valuable.

Direct integration into the existing plenum

The GCAC48H/NhA boxed coil is designed for direct integration into the plenum, without major modifications to the ductwork. This approach allows for:

• faster installation ,

• fewer invasive procedures,

• better cost control,

• a clean and lasting result.

On several occasions, particularly in single-family homes in Laval and on the South Shore, this solution has made it possible to retain an existing furnace while adding a high-performance central heat pump, capable of providing primary heating for a large part of the winter.

Valuable flexibility in renovation

In renovation projects, every centimeter counts. Mechanical rooms are often cramped, clearances limited, and room for maneuver reduced. The boxed coil format, combined with a well-proportioned outdoor unit, greatly facilitates integration into existing buildings, including Montreal duplexes and triplexes.

Heating efficiency: a top priority in Quebec

For a long time, the main weakness of central heat pumps was their efficiency during periods of intense cold. This is no longer the case here.

Reliable heating down to -30°C

The GREE UNIX R32 4T central heat pump is designed to maintain stable heating capacity down to -30°C . In real-world conditions, this means:

• less reliance on supplementary elements,

• a more constant indoor temperature

• a reduction in overall electricity consumption.

Detailed thermal capacities

• Nominal capacity : 48,000 BTU (4 tonnes)

• Power at -8°C : 35,200 BTU

• Power at -15°C : 48,000 BTU

• Cooling capacity : 48,000 BTU

These figures are not abstract. They correspond to large houses, multi-unit dwellings or buildings where heat loss is significant, particularly on the North Shore , which is more exposed to wind and extreme temperatures.

Measurable energy efficiency and concrete savings

A high-performance central heat pump must offer more than just power. It must do so efficiently , day after day, season after season.

Efficiency indicators

• SEER2 : 18.0

• HSPF2 : 10.0

• EER2 : 12.5

• COP at -8 °C : 3.60

These figures reflect excellent conversion of electrical energy into heat , even when the outside temperature drops. For homeowners, this translates directly into lower electricity bills, especially during extended heating periods.

LogisVert Subsidy

This model is eligible for the LogisVert provincial subsidy , with an amount of up to $4,224 , depending on the configuration and the application date. At AirGreen, we systematically assist our clients in verifying the criteria and preparing their application to maximize the available financial assistance.

R-32 refrigerant: a consistent choice for today and tomorrow

R-32 is not a mere technical detail. It is a fundamental choice:

• improved thermodynamic efficiency ,

• reduced global warming potential ,

• increased compliance with current and future environmental standards.

For homeowners concerned about the sustainability of their investment and the environmental impact of their HVAC system, R-32 represents a balanced solution, without compromising on performance.

Compatibility, control and security

24 VAC Thermostats

Compatibility with standard 24 VAC thermostats allows for a wide range of configuration options. This makes it easier to:

• integration with existing systems,

• the future replacement of the thermostat,

• long-term maintenance.

Communication and reliability

RS485 communication ensures stable and precise system management, while the refrigerant leak detector integrated into the coil adds a significant level of safety, particularly in multi-unit residential buildings and light commercial buildings.

Essential technical specifications for demanding projects

• Exterior model : GUD60W2/NhE-D(U)

• Interior model : GCAC48H/NhA

• AHRI : 216768110

• ENERGY STAR® Cold Climate Certification : Yes

• Voltage : 220 V

• MCA : 40 A

• MOP : 45 A

• Outdoor noise level : 62 dB(A)

• Maximum airflow : up to 1,500 CFM

• Dehumidification : 15.01 pt/h

These features make this model a perfect solution for high-end residences , plexes and certain commercial projects in Greater Montreal.

AirGreen field feedback and experiences

In Longueuil, in a two-story house with a finished basement, the client experienced significant temperature differences between levels. After the installation of the ADD-ON GREE UNIX R32 central heat pump , combined with precise duct balancing, comfort became uniform throughout the house, even during periods of extreme cold.

In Montreal North, in a triplex, the flexibility of the box coil allowed for integration without major modification of existing ducts, while respecting space constraints and safety requirements.

Common mistakes we help our clients avoid

With this type of system, certain errors are common:

• choosing an insufficient capacity to reduce the initial cost,

• ignoring the actual condition of existing conduits,

• neglecting the importance of sizing and balancing.

At AirGreen, every project begins with a complete building analysis , including heat loss, ductwork configuration, and occupancy patterns. This thorough approach avoids costly adjustments after installation and ensures long-lasting performance.

Why entrust your installation to AirGreen

Doing business with AirGreen means benefiting from:

• certified and experienced installers ,

• of $5,000,000 in liability insurance ,

• clear and detailed pricing , presented before the work begins,

• structured support for HVAC subsidies ,

• of an accessible and organized after-sales service.

We operate daily in Montreal, Laval, Longueuil, on the North Shore and the South Shore , with an approach focused on sustainability, reliability and long-term satisfaction.

Conclusion

The GREE UNIX R32 | 4T | Coil-in-Casket "ADD-ON" Central Heat Pump represents a robust, flexible, and high-performance solution for homeowners looking to upgrade their central heating system without compromise. Its heating capability in very cold weather, its intelligent integration with existing systems, and its energy efficiency make it a perfect choice for Quebec's climate.

Contact AirGreen today for a personalized assessment, a detailed estimate, or to check your eligibility for available subsidies. Our team is ready to support you every step of the way with your HVAC project.