GREE FLEXX R32 "ADD-ON" Central Heat Pump | 5T | Cased Coil

• BROCHURE: FRENCH
• BROCHURE: ENGLISH
• DRAWINGS: FRENCH
• DRAWINGS: ENGLISH

A central solution designed for demanding Quebec buildings

At AirGreen, we work daily on central HVAC systems installed in a wide variety of settings: single-family homes in Montreal, multi-unit residential buildings in Laval, commercial buildings in Longueuil, windy residences on the North Shore , and South Shore properties subject to long periods of continuous heating. The GREE FLEXX R32 "ADD-ON" Central Heat Pump | 5 tons with a boxed coil is perfectly suited to this real-world situation.

This system wasn't designed as a generic, one-size-fits-all solution, but as a modular central platform capable of intelligently integrating with existing installations, while delivering stable heating and cooling performance , even in extreme weather conditions. This is precisely what many homeowners in Quebec are looking for: to modernize their central system without having to rebuild everything.

Add-on architecture: flexibility and continuity of the existing system

A system designed for replacement and optimization

The ADD-ON configuration means this central heat pump can be paired with an existing furnace or heat exchanger , a major advantage in many replacement projects. In practice, we frequently encounter buildings where the ductwork is still in good condition, but the heating or cooling system has become energy-inefficient, noisy, or ineffective.

With the GREE FLEXX R32 5T, it is possible to:

• Retain the existing network of conduits

• Reduce major transformation costs

• Modernizing overall energy performance

• Improving comfort without disrupting the building's structure

This type of configuration is particularly common in homes built between the 1980s and 2010s in Montreal and Laval, where central ducts are well sized, but heating technology has become outdated.

Power adapted to large volumes

With a nominal capacity of 60,000 BTU (5 tonnes) , this system is clearly aimed at large buildings or those with high heat loads. In our experience, this is an ideal output for:

• Houses of more than 2,500 to 3,500 sq ft

• Duplexes, triplexes and small multi-unit buildings

• Commercial spaces with high ceilings

• Buildings with average insulation requiring a power reserve

This reserve allows the system to operate at partial load most of the time, which improves thermal stability, reduces component wear and optimizes power consumption.

Coil in a box: thermal stability and clean integration

Why the boxed coil makes a difference

The GCAC60H/NHA box-type coil is not simply a secondary component. It plays a central role in the quality of heat exchange and the long-term reliability of the system. At AirGreen, we favor this type of coil in central installations for several concrete reasons:

• Improved airtightness in the plenum

• Compact and structured integration

• Easy access for HVAC maintenance

• Less unwanted heat loss

• Increased performance stability in intensive heating

During several installations carried out on the South Shore, we observed that systems equipped with a box coil maintain a more uniform temperature throughout the building, particularly in areas far from the main plenum.

Materials and design

The coil is constructed with copper tubing and aluminum fins , a proven standard in high-end central systems. This combination ensures:

• Excellent thermal conductivity

• Good corrosion resistance

• Durability adapted to repeated thermal cycles

Heating performance: designed for harsh winters

Reliable heating down to -30°C

One of the most key features of the GREE FLEXX R32 is its heating capacity down to -30°C , a crucial characteristic in the Greater Montreal climate. In numerous installations we have completed in Laval and on the North Shore, this system continues to produce consistent heat even during prolonged periods of intense cold.

Observed operating data:

• Power at -8°C: 40,000 BTU

• Power at -15°C: 54,000 BTU

• Maintaining interior comfort without sudden fluctuations

This capability makes it possible to limit, or even eliminate, the excessive use of auxiliary heating elements, which translates into real savings on the energy bill.

Energy efficiency in real-world conditions

With a COP of 11.83 at -8°C , the system demonstrates exceptionally high efficiency for a central heat pump of this capacity. In practical terms, this means that each kilowatt of electricity consumed generates significantly more heat than older central systems.

Central air conditioning: comfort and consistency throughout the summer

High cooling capacity

In air conditioning mode, the 60,000 BTU capacity allows for efficient management of intense heat episodes, particularly in dense urban areas like Montreal and Longueuil, where heat accumulation is significant.

Unlike some oversized, poorly tuned systems, the GREE FLEXX operates progressively, which allows:

• A stable indoor temperature

• Fewer short cycles

• Better humidity management

Seasonal efficiency indicators

The efficiency values ​​reflect a design geared towards sustainable performance:

• SEER2: 15.23

• EER2: 19.52

In practice, these figures translate into efficient air conditioning without unnecessary overconsumption, even during particularly hot summers.

R-32 refrigerant: a consistent and responsible choice

The choice of R-32 refrigerant is part of a strategy focused on efficiency and energy transition. Compared to older refrigerants, R-32 offers the following advantages:

• Improved thermodynamic efficiency

• A reduction in the total refrigerant charge

• A reduced environmental impact

For homeowners who wish to modernize their central system while taking into account new energy standards, this choice represents a relevant balance between performance and responsibility.

Airflow, static pressure and overall comfort

Air management in complex networks

With an airflow exceeding 4,000 CFM , this system is capable of efficiently supplying complex ductwork networks, including:

• Long horizontal spans

• Several floors

• Multiple elbows

• Areas distant from the main plenum

In older Montreal homes where ductwork is not always optimal, this high capacity makes it possible to achieve consistent comfort without having to completely redo the air distribution.

Controlled noise level

Despite its power, the outdoor unit has a noise level of approximately 62 dB(A) . With careful placement (base, orientation, clearances), operation remains discreet, even in close residential environments.

HVAC installation: AirGreen's expertise makes the difference

Installing a 5-tonne ADD-ON central heat pump is never simply a matter of connecting components. At AirGreen, every project begins with a thorough analysis:

• Complete thermal assessment of the building

• Analysis of the existing conduit network

• Electrical load verification (220 V, MCA 40 A, MOP 45 A)

• Precise adjustment of operating parameters

We have often been called upon to correct poorly executed installations elsewhere: poorly integrated coils, insufficient airflow, incorrect balancing. Our approach aims to deliver a system that functions correctly from day one and maintains its performance over time.

Subsidies, guarantees and long-term value

This model is eligible for the LogisVert provincial grant , with an amount of up to $4,800 , subject to applicable conditions. For many clients, this financial assistance has made the project much more accessible, while also accelerating the return on investment.

The 12-year warranty on the compressor and parts , with the option of additional protection, provides valuable peace of mind for a central system of this size.

Why choose AirGreen for your central HVAC project?

Our clients choose us for concrete and measurable reasons:

• Clear and confirmed prices before work begins

• Experienced refrigeration technicians specializing in central systems

• $5,000,000 liability insurance

• Real-world experience on GREE FLEXX installations in Montreal, Laval, Longueuil, North Shore and South Shore

We never propose a central heat pump without being certain that it truly meets the needs of the building and the expectations of the owner.

Conclusion

The GREE FLEXX R32 | 5T | Coil-in-Casing "ADD-ON" Central Heat Pump represents a robust, consistent, and durable solution for Quebec buildings subjected to demanding climatic conditions. When properly sized and installed, it offers consistent comfort , high energy efficiency , and a tangible reduction in heating and cooling costs .

For a personalized assessment , a detailed quote , or technical advice tailored to your building , contact AirGreen directly. Our team will support you at every stage of your central HVAC project.