Gree FLEXX ULTRA R32 Central Heat Pump | 4 Tons | Montreal, Laval, Longueuil, South Shore & North Shore

• Official Brochure: FRENCH
• Official Brochure: ENGLISH

A central solution designed for demanding Quebec buildings

At AirGreen, we have been installing central HVAC systems in a wide variety of settings for over 15 years: modern single-family homes, older properties undergoing renovation, duplexes, triplexes, and small apartment buildings. The Gree FLEXX ULTRA R32 – 4-tonne central heat pump is a particularly suitable solution when heating and cooling needs are high and comfort must remain consistent, regardless of weather conditions.

This model was developed to offer true flexibility , both in new construction and replacement projects. Its design allows for efficient integration with existing ductwork, while delivering performance that meets the demands of the harsh winters and humid summers typical of Montreal , Laval , Longueuil , the South Shore and the North Shore .

Unlike many central systems that show their limitations as soon as the temperature drops, the Gree FLEXX ULTRA R32 maintains stable performance down to -30°C , making it a strategic choice for homeowners who want to reduce their reliance on supplementary electric or fossil fuel heating.

In-depth technical performance and concrete impacts on comfort

The 4-tonne (48,000 BTU) version of this central heat pump is designed for large areas or buildings with a high heating load. At AirGreen, we have installed this model in several large residences on the South Shore , notably in Boucherville, Saint-Bruno-de-Montarville, and Saint-Jean-sur-Richelieu, as well as in Montreal neighborhoods where homes have high ceilings or large air volumes.

Constant heating even in extreme cold.

In real-world winter conditions, the Gree FLEXX ULTRA R32 demonstrates impressive heating capacity. At -8°C , it delivers approximately 39,500 BTUs , and it maintains a high output down to -15°C and below. This stability results in more uniform comfort throughout the building, without cold spots or sudden temperature fluctuations.

In several projects completed in Laval and on the North Shore , clients have mentioned a notable difference compared to their old central system: fewer on/off cycles, gentler heat and a feeling of continuous comfort, even during very cold nights.

The COP of 12.03 at -8°C clearly illustrates this efficiency. In practical terms, this means that each kilowatt consumed produces more useful heat, which helps to reduce energy costs over the entire season.

Controlled air conditioning and humidity management

In summer, the 48,000 BTU cooling capacity helps maintain a stable indoor temperature, even during the intense heat waves that are becoming increasingly common in Quebec. However, comfort isn't solely dependent on temperature: humidity plays a crucial role.

With a dehumidification capacity of 15.01 pints per hour , the Gree FLEXX ULTRA R32 – 4-tonne excels at managing indoor humidity. In areas like Longueuil , Montreal East , or certain waterfront areas of the South Shore , this feature significantly improves air quality and the feeling of freshness, even without excessively lowering the temperature.

Airflow, static pressure and overall comfort

With a maximum airflow of up to 1,500 CFM, it can efficiently supply a well-designed ductwork system. At AirGreen, we pay close attention to static pressure, balancing, and the condition of existing ductwork. A high-performance central heat pump cannot reach its full potential if the air distribution is inadequate.

On the acoustic side, the indoor sound level of approximately 52 dB(A) remains discreet for a system of this power, while the outdoor unit, at 62 dB(A) , meets the expectations of densely populated residential areas in Montreal and Laval.

R32 refrigerant: a future-proof choice for central HVAC systems

R32 represents a significant evolution in the field of HVAC systems. At AirGreen, we are seeing growing interest in this refrigerant, both for its performance and its reduced environmental impact.

Its tangible advantages include:

• Improved thermal efficiency

• A lower refrigerant charge for equivalent performance

• Increased compatibility with current and future standards

For owners who view their system as a long-term investment, choosing R32 helps ensure the longevity of the installation and limits the risks of premature replacement due to regulatory changes.

HVAC Installation: Our Methodology for a Lasting Result

Installing a 4-tonne central heat pump is a major project for a building. At AirGreen, we apply a rigorous methodology to avoid the common mistakes seen in the market.

Load analysis and precise dimensioning

An improperly designed system has direct consequences:

• Oversizing: short cycles, inefficient dehumidification, premature wear

• Undersizing: discomfort during peak periods, excessive strain on equipment

We perform load calculations adapted to the actual characteristics of the building, taking into account insulation, orientation, windows and occupancy habits.

Electrical checks and compliance

With a 40A MCA and a 45A MOP , this central heat pump requires a suitable electrical supply. In many older Montreal homes, electrical panel upgrades are necessary. At AirGreen, these factors are analyzed from the outset and included in the final quote, eliminating unexpected costs.

Integration with existing systems

Compatibility with dual-fuel configurations or existing electric furnaces allows for great flexibility. On the North Shore , where some properties combine heat pumps and supplemental heating for energy security reasons, this flexibility is often crucial.

LogisVert grant: significant financial support

The Gree FLEXX ULTRA R32 – 4-tonne central heat pump is eligible for a LogisVert grant of up to $4,740 , subject to meeting the applicable criteria. At AirGreen, we support our clients every step of the way: eligibility verification, equipment compliance, document preparation, and administrative follow-up.

Many clients tell us that this support makes all the difference, both for the simplicity of the process and for the speed of obtaining financial assistance.

Customer feedback, field observations, and lessons learned

The feedback we receive on this model accurately reflects our experience: stable comfort, good balance between power and noise level, consistent efficiency in both heating and cooling.

We also learned the importance of post-installation support. Some advanced features require adjustments or clear explanations. Our team remains available to provide structured and responsive HVAC after-sales service , ensuring the system operates optimally in the long term.

Why entrust your project to AirGreen

Choosing the Gree FLEXX ULTRA R32 – 4 tonnes is a technical decision. Choosing AirGreen ensures that this decision is correctly implemented.

We offer:

• Transparent pricing , confirmed before work begins

• Experienced refrigeration technicians specializing in central systems

• $5,000,000 liability insurance

• A strong local presence in Montreal and a showroom on the South Shore

Our approach is based on quality of execution, durability of installations and a long-term relationship of trust with our clients.

Conclusion and next steps

The Gree FLEXX ULTRA R32 – 4-tonne central heat pump is a complete solution for buildings requiring power, stability, and energy efficiency in Quebec's climate. When properly sized and installed, it provides consistent comfort, effective humidity control, and eligibility for current subsidy programs.

For a detailed quote , technical analysis, or in-depth discussion regarding your project in Montreal , Laval , Longueuil , on the North Shore or South Shore , we invite you to contact AirGreen directly. Our team will take the time to assess your situation and propose a truly tailored HVAC solution.