GREE FLEXX R410A “ADD-ON” Central Heat Pump | 5T - Cased Coil

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A central heat pump truly designed for Quebec winters and demanding buildings

At AirGreen , we never select an HVAC system based solely on a technical specification sheet. Every central heat pump we offer is the result of real-world feedback , actual installations, and performance observed over several full seasons in Montreal , Laval , Longueuil , and on the North and South Shores. The GREE FLEXX R410A | 5T - Cased Coil "ADD-ON" Central Heat Pump is clearly one of those systems that meets the realities of Quebec, both in terms of climate and the structural requirements of existing buildings.

This model is particularly sought after by homeowners who want to convert or optimize an existing forced-air central system without completely overhauling the infrastructure. In several projects we've completed, the GREE FLEXX ADD-ON has proven to be a logical solution when the goal was to reduce energy costs , improve winter comfort, and add efficient central air conditioning, all without unnecessary major construction work.

A direct response to the limitations of the old central systems

Many buildings in Quebec are still equipped with:

• Energy-intensive electric furnaces

• Gas systems used continuously

• Aging or undersized central air conditioning systems

In these situations, the ADD-ON GREE FLEXX 5-tonne central heat pump allows for modernization of the core of the HVAC system , while retaining existing ductwork when it is adequate. This approach is particularly relevant in homes built between 1990 and 2015, a housing stock prevalent in Laval , Longueuil , and on the North Shore .

Heating and air conditioning performance: figures that translate into results on the ground

Reliable heating capacity down to -30°C

One of the key factors for us at AirGreen is stable heating during periods of intense cold . The GREE FLEXX R410A 5T is designed to operate down to -30°C , which corresponds to the actual climatic conditions we encounter every winter in Quebec.

Key data observed and validated:

• Rated power : 60,000 BTU

• Power at -8°C : 39,500 BTU

• Power at -15°C : 39,000 BTU

• Heating capacity maintained at very low temperature

In several large single-family homes on the South Shore , this stability helps limit the activation of auxiliary heating, which directly translates into more predictable electricity bills and constant comfort, even during prolonged cold spells.

Central air conditioning suitable for large spaces

With a cooling capacity of 60,000 BTU , this central heat pump is perfectly suited for open-concept homes, multi-story buildings, or properties with high summer heat loads.

The 1,130 CFM airflow ensures even distribution of conditioned air, reducing temperature differences between different areas of the building, a common problem with older, poorly balanced central systems.

Energy efficiency and actual performance

Performance indicators consistent with modern expectations

The GREE FLEXX ADD-ON 5T Central Heat Pump boasts efficiency values ​​that meet current Quebec market standards:

• SEER2 : 17.0

• HSPF2 : 9.0

• EER2 : 10.0

• COP at -8 °C : 11.83

These figures become truly meaningful when combined with a rigorous installation , including proper sizing, appropriate piping, and a compliant electrical configuration. In projects completed by AirGreen in Montreal East and Laval West , this performance has resulted in a measurable reduction in annual energy consumption compared to older central electrical systems.

Inverter technology: stable comfort and reduced wear

The variable-speed inverter compressor continuously adjusts its power according to the building's actual demand. Unlike fixed-speed systems, this allows:

• A more stable indoor temperature

• Fewer sudden changes

• A reduction in operating noise

• Improved component longevity

This type of operation is particularly appreciated in homes where occupancy varies throughout the day, a common scenario in the residential areas of Longueuil and the North Shore .

Add-on integration: a key point often misunderstood

A compatibility that requires serious analysis

The term ADD-ON is sometimes misunderstood. It's not simply about adding a heat pump without careful consideration. At AirGreen, every project includes:

• An analysis of the existing conduit network

• A static pressure check is available.

• Validation of the airflow required for 5 tonnes

• A study of electrical compatibility (220 V, MCA 35 A, MOP 45 A)

This rigor avoids common problems such as excessive noise, poorly served areas or performance below expectations.

Dimensions and installation constraints

• Indoor Unit (Cased Coil) : 24.5 x 21.25 x 57 in

• Outdoor unit : 39.375 x 14.5 x 53.625 in

• Outdoor noise level : 58 dB(A)

The side discharge design facilitates installation in confined spaces, an important advantage in several urban areas of Montreal , where space around the building is limited.

Long-term reliability and guarantees

Peace of mind appreciated by our clients

The GREE FLEXX R410A central heat pump is covered by a standard warranty of:

• 12 years on the compressor

• 12 years on parts

• 0 years on the workforce

At AirGreen, we also offer warranty extensions when relevant to the project and the type of building occupancy.

In the field, our team observes appreciable electronic stability , good tolerance to variable climatic conditions and constant availability of parts, an essential factor for after-sales service.

LogisVert subsidy: an important financial lever

This central heat pump is eligible for Hydro-Québec's LogisVert subsidy , which can reach $4,740 (updated: November 26, 2025).

In several projects carried out on the North Shore and the South Shore , this grant has enabled:

• To significantly reduce the initial cost

• To accelerate the return on investment

• To make the transition to a central heat pump more accessible

AirGreen systematically supports its clients in:

• Validation of eligibility

• The conformity of the installation

• Preparing the required documents

Why AirGreen recommends the GREE FLEXX ADD-ON 5T

We recommend this model because it corresponds to real-life situations , not idealized scenarios. It is particularly relevant when:

• The building already has a functional network of conduits

• The thermal load is high

• Winter comfort is a priority

• Long-term reliability is a key criterion

Whether in Montreal , Laval , Longueuil , on the North Shore or the South Shore , the GREE FLEXX R410A | 5T - Cased Coil "ADD-ON" Central Heat Pump stands out as a coherent, durable and technically sound solution.

Conclusion

The GREE FLEXX ADD-ON 5T R410A Central Heat Pump is a well-structured choice for homeowners looking to upgrade their central HVAC system without compromising on comfort or winter performance. When properly installed, it provides a reliable four-season solution that meets current energy requirements in Quebec.

For a personalized analysis , a detailed quote , or to verify the compatibility of your existing installation , contact AirGreen . Our team will assist you from the initial assessment to the final installation, throughout Montreal , Laval , Longueuil , and on the North and South Shores .

Contact AirGreen now to discuss your central HVAC project.