GREE UNIX R32 Central Heat Pump – 4 Tons - 48,000 BTU

• Official Brochure: FRENCH
• Official Brochure: ENGLISH

A central heat pump designed for Quebec's climatic realities

At AirGreen, we have been installing central HVAC systems for over fifteen years in very real-world contexts: older single-family homes in Montreal, newer, highly airtight constructions on the South Shore, duplexes and triplexes in Laval, apartment buildings in Longueuil, and properties exposed to wind and extreme temperature variations on the North Shore. With this field experience, we know that a central heat pump must do much more than meet theoretical specifications: it must deliver consistent, measurable, and reliable performance , even during the most demanding winters.

The GREE UNIX R32 – 4-tonne (48,000 BTU) central heat pump is one of the systems we recommend when heating is not just a supplement, but a primary source of comfort . Designed to maintain its capacity down to -30°C , it directly addresses the limitations observed in many older central systems: reduced efficiency in extreme cold, excessive reliance on auxiliary electric heating elements, discomfort in certain areas of the house, and unpredictable energy costs.

This series is based on an advanced DC inverter architecture, combined with a two-stage, two-cylinder compressor , enabling extremely precise modulation. In practice, this translates to a system that continuously adjusts its power, avoids short cycling, stabilizes the indoor temperature, and reduces premature wear of components. For our customers, this means consistent comfort, less noise, and an extended system lifespan.

Actual thermal performance and controlled energy efficiency

A capacity adapted to large volumes

The 4-tonne, 48,000 BTU version is designed for large areas or buildings with high heating requirements: large houses, multi-unit dwellings, buildings with high ceilings, or configurations with several zones located far from the central plenum. This model offers:

• Cooling capacity : 48,000 BTU

• Nominal heating capacity : 48,000 BTU

• Available power at -8°C : approximately 39,500 BTU

• Stable operation down to -30°C

• SEER2 up to 18.0 for air conditioning

• HSPF2 up to 10.0 for heating

• COP at -8°C approximately 3.4 to 3.6 depending on the configuration

In our facilities in Laval and Montreal, this level of performance translates into a significant reduction in winter consumption peaks , particularly in homes that previously relied on conventional electric heating or a heat pump unable to keep up during prolonged cold periods.

Summer comfort that is often underestimated

While heating is often the priority in Quebec, central air conditioning remains essential for summer comfort. The GREE UNIX R32 ensures stable cooling even during heat waves , with a modulation capability that prevents sudden temperature fluctuations. In several projects on the South Shore, residents have noted a more uniform temperature between floors , a critical factor in open-concept homes.

Humidity management: an invisible but crucial comfort

An often overlooked aspect when choosing a central heat pump is dehumidification . Yet, excessive humidity can make a home uncomfortable even at a comfortable temperature. The GREE UNIX R32 – 4 tons offers a dehumidification capacity of approximately 15.01 pt/h , which is particularly relevant in:

• very airtight houses,

• the finished basements,

• renovated buildings with enhanced insulation.

During an installation carried out by AirGreen in Longueuil, in a completely renovated house, this capability made it possible to stabilize the indoor humidity level without adding an independent dehumidifier , improving both comfort, air quality and the protection of interior materials.

Flexible installation and smart integration

Retrofit, existing furnace and cost optimization

The UNIX R32 series is distinguished by its remarkable installation flexibility . It can be integrated:

• as a complete GREE system (indoor and outdoor unit),

• in retrofit , while retaining certain compatible existing components,

• with a furnace already in place and a coil in a box,

• with most standard 24V thermostats .

For many homeowners in Montreal and Laval, this compatibility allows them to modernize their HVAC system without completely rewiring the distribution network , significantly reducing labor costs and construction time. At AirGreen, we always analyze the existing configuration to offer the most technically and financially sound solution.

Integrated communication, control and security

The GREE UNIX R32 is compatible with RS485 communication systems, facilitating integration with advanced controls when required. It also features a refrigerant leak detector on all indoor units. This device acts as an additional safety measure: in the event of a malfunction, the system reacts immediately to protect occupants and equipment.

In the multi-unit residential buildings we serve on the North Shore, this feature is particularly appreciated by owners concerned about safety and compliance.

R32 refrigerant: a sustainable technical choice

R32 represents a significant improvement over older refrigerants. It offers:

• a reduced environmental impact ,

• improved thermal efficiency ,

• a smaller refrigerant charge for the same capacity.

For our commercial and residential customers, this choice ensures the sustainability of the system in the face of future regulatory changes, while improving overall energy efficiency.

Concrete examples of installations carried out by AirGreen

Single-family residence – South Shore

In Saint-Lambert, we replaced an aging central heat pump with a GREE UNIX R32 – 4-tonne unit in a house of over 2,800 sq ft. The results observed from the very first winter:

• stable heating even on nights at -27°C.

• reduced use of auxiliary heating,

• noticeable reduction in interior noise,

• better air distribution thanks to a flow rate exceeding 1200 CFM.

Apartment building – Laval

In a six-unit building, compatibility with existing thermostats allowed for a quick transition. The landlord observed a decrease in service calls and increased tenant satisfaction during the following cold season.

LogisVert grant and AirGreen support

The GREE UNIX R32 – 4-tonne central heat pump is eligible for the LogisVert grant , which can reach $4,740 depending on the configuration and project. At AirGreen, we don't just install; we support our clients in:

• technical validation of eligibility,

• the preparation of the required documents,

• the submission of a complete and compliant application.

This approach significantly reduces the risk of refusals or unnecessary delays.

Why entrust your central HVAC project to AirGreen

Choosing the right equipment is essential, but the quality of the HVAC installation remains crucial for the system's actual performance. At AirGreen:

• Our certified refrigeration technicians are experts in the specifics of high-performance central systems.

• Each project begins with a rigorous thermal analysis .

• Prices are clearly communicated before work begins .

• We have $5,000,000 in liability insurance .

This rigor explains why our GREE central heat pump installations are multiplying in Montreal, Laval, Longueuil, on the North Shore and the South Shore, in residential, multi-unit and light commercial buildings.

Conclusion

The GREE UNIX R32 central heat pump – 4 tonnes – 48,000 BTU is for homeowners looking for a central system truly adapted to the Quebec climate , capable of providing heating, air conditioning and dehumidification with consistency, efficiency and reliability.

For a personalized assessment , a detailed quote , or to verify your eligibility for the LogisVert grant, contact AirGreen Air Conditioning & Heating directly. Our team will assist you every step of the way, from the initial analysis to the complete commissioning of your central HVAC system.