Gree FLEXX ULTRA R32 Central Heat Pump | 5 Tonnes | Montreal, South Shore, Montérégie

• Official Brochure: FRENCH
• Official Brochure: ENGLISH

A central heat pump designed for the most demanding Quebec winters

At AirGreen, we work daily with building owners and managers who face a very specific reality: in Quebec, a central HVAC system must be reliable at very low temperatures , stable in the long term, and flexible enough to adapt to existing buildings that are rarely perfect. The Gree FLEXX ULTRA R32 – 5-tonne central heat pump meets these requirements precisely.

This model was designed to offer consistent heating performance down to -30°C , without sacrificing energy efficiency or compatibility with existing central systems. In practice, this means less reliance on supplemental electric heating, better control of energy costs, and consistent thermal comfort, even during the periods of intense cold that we regularly experience in Montreal , Laval , Longueuil , and on the North and South Shores .

We have installed this central heat pump in large single-family homes, duplexes, triplexes, and multi-unit buildings, often replacing R-410A systems that had become inefficient or difficult to maintain. In each case, the objective was clear: to increase actual heating performance while preparing the building for current and future energy standards .

In-depth technical performance and concrete data

Actual heating capacity and stability

The 5-tonne version of the Gree FLEXX ULTRA R32 delivers a nominal power of 60,000 BTU , but this figure only becomes meaningful when examining the system's behavior under real-world conditions:

• 45,000 BTU at -8°C

• 54,000 BTU at -15°C

• Stable and continuous operation down to -30°C

In several installations completed by AirGreen in the Montérégie region and on the South Shore , this capability has made it possible to maintain a constant indoor temperature without significant fluctuations, even during prolonged periods of extreme cold. For occupants, this translates into a feeling of consistent comfort throughout all areas served by the ductwork.

Energy efficiency and certifications

The heat pump is ENERGY STAR® and ENERGY STAR® Cold Climate certified, confirming that it meets the efficiency criteria required for northern climates. It also displays a valid AHRI number, guaranteeing that the advertised performance is verified according to recognized protocols.

For our clients, these certifications have a dual importance:

• They ensure measurable and consistent energy performance .

• They make the system eligible for subsidy programs , notably Hydro-Québec's LogisVert .

Humidity management: an often overlooked comfort

A key aspect of the Gree FLEXX ULTRA R32 is its dehumidification capacity of 17.22 pints per hour . In many modern, highly airtight homes, excessive humidity can become a major problem, especially in summer.

During projects carried out in Brossard and Saint-Lambert , this dehumidification capacity enabled:

• to reduce the feeling of heavy air,

• to improve comfort without excessively lowering the temperature,

• to limit the risks of condensation in ducts and sensitive areas of the building.

Airflow, acoustics and everyday comfort

Air circulation adapted to large areas

With an airflow of 11,500 CFM , this central heat pump is ideally suited for large areas and multi-story buildings. When properly sized and balanced, it provides even distribution of warm or cool air, eliminating overheated or underheated areas.

At AirGreen, we pay particular attention to:

• balancing the ducts,

• the fan speed,

• the static pressure of the network.

These adjustments are essential to fully utilize the system's capabilities and ensure sustainable performance.

Controlled noise levels

• 53 dB(A) indoors

• 63 dB(A) outdoors

These noise levels are particularly appreciated in the densely populated residential areas of Montreal and Laval , where noise from outdoor units can quickly become a problem. Several customers have told us that the system operates significantly more quietly than their previous equipment, both indoors and outdoors.

Intelligent design and HVAC compatibility

A truly flexible central system

The Gree FLEXX ULTRA R32 stands out due to its compatibility with standard 24 VAC thermostats , which greatly simplifies replacement projects. In many cases, it is possible to retain:

• the existing thermostat,

• part of the wiring,

• certain components of the central system.

This flexibility reduces overall project costs and limits invasive work, an important advantage for inhabited houses or rental buildings.

Safety and adaptation to R-32 refrigerant

The R-32 refrigerant is known for its energy efficiency and low environmental impact. However, it does come with specific safety requirements. The heat pump incorporates a leak detection sensor , an essential component for complying with current standards.

At AirGreen, our certified refrigeration technicians adapt each installation taking into account:

• lengths of piping,

• required diameters ( 3/8 – 3/4 ),

• of the additional charge by refrigerating if necessary,

• site clearances and constraints.

AirGreen lessons learned and projects

Single-family home – Montérégie

In a large residence previously heated by an undersized central heat pump, the owner noticed a heavy reliance on electric backup heating as soon as the temperature dropped below -12°C. After a complete building analysis, we recommended the Gree FLEXX ULTRA R32 5-tonne unit .

Results observed after the first winter season:

• a significant decrease in the use of supplemental heating,

• stable temperature on two floors

• more predictable energy consumption.

Multi-unit residential building – East Montreal

In a multi-unit residential building, the priority was long-term reliability and ease of maintenance. The compressor's robustness and the system's design convinced the building manager to choose this model. Residents quickly noticed improved comfort and reduced noise compared to the old system.

Subsidies, costs and financial planning

The Gree FLEXX ULTRA R32 – 5-tonne central heat pump is eligible for a LogisVert grant of up to $5,400 , subject to applicable criteria. At AirGreen, we always factor this into the quote process.

Specifically, we support our clients in:

• the analysis of eligibility,

• the preparation of the required documents,

• coordination with available funding programs.

This approach avoids refusals and delays, while optimizing the return on investment of the HVAC project.

Why AirGreen Makes a Difference

Choosing a high-performance central heat pump is essential, but the quality of the installation remains crucial. At AirGreen, we distinguish ourselves by:

• over 15 years of field experience ,

• transparent pricing , confirmed before work begins,

• $5,000,000 liability insurance

• teams specializing in complex central systems.

Each project begins with a detailed analysis of the building, its insulation, its ductwork, and the occupants' consumption habits. This rigorous approach allows us to deliver reliable, durable installations tailored to local conditions, whether in Longueuil , Laval , on the North Shore , or the South Shore .

Conclusion

The Gree FLEXX ULTRA R32 | 5 Tonne Central Heat Pump represents a complete solution for buildings requiring high heating and cooling performance, without compromising energy efficiency or long-term reliability. When properly sized and installed, it is a sound investment in comfort and building value.

To obtain a detailed quote , discuss your central HVAC replacement or installation project, or to confirm your eligibility for subsidies , contact our team directly. At AirGreen, we prioritize a rigorous, transparent, and tailored approach for each situation.