ELIOS R410A "ADD-ON" Central Heat Pump | 5T - Cased Coil

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A central heat pump designed for existing buildings and real-world projects in Quebec

At AirGreen Heat Pumps, Air Conditioning & Heating , we have been installing central systems long enough to know that an existing building is never a theoretical case. In Montreal, Laval, Longueuil, on the North Shore as well as the South Shore, every house, every building, every commercial space presents its own constraints: aging ductwork, cramped mechanical rooms, already overloaded electrical systems, or even coexistence with an electric or dual-energy furnace.

The ELIOS R410A 5-tonne "ADD-ON" central heat pump with boxed coil was specifically designed for this type of situation. It's not a system intended solely for new builds or idealized projects, but rather an adaptable , robust , and logical solution capable of seamlessly integrating into an existing installation without disrupting it.

In practice, this type of "add-on" configuration is one of the most requested by our clients. It allows a high-performance central heat pump to be added to an existing system, while maintaining energy flexibility, security during periods of intense cold, and control over installation costs.

A reliable heating capacity down to -30°C: a non-negotiable criterion

In the field of central HVAC , one of the most frequently misunderstood points by consumers is the difference between advertised capacity and actual usable capacity in winter. At AirGreen, we systematically evaluate systems based on their performance in extreme cold , because in Quebec, this is not an exceptional scenario: it's a normal condition.

The ELIOS "ADD-ON" 5T central heat pump is designed to deliver stable performance down to -30°C , making it ideal for the winters of Montreal, Laval, Longueuil, and surrounding areas. This performance is based on a proven technological combination: HEAT+ technology paired with a fine-modulation Inverter compressor , capable of continuously adjusting its power output rather than operating in abrupt cycles.

In practical terms, this translates to:

• a more constant indoor temperature , without uncomfortable variations,

• a marked reduction in frequent starts and stops,

• less frequent use of auxiliary electric heating elements,

• improved predictability of energy costs throughout the heating season.

For a 60,000 BTU system, this stability is particularly important. It allows for the efficient heating and cooling needs of large residences, multigenerational homes, duplexes, or light commercial buildings, without compromising comfort during prolonged cold periods.

A coherent technical architecture adapted to "add-on" installations

The 5-tonne version of the ELIOS central heat pump is based on a precise technical configuration, designed for integration and durability:

• Outdoor unit : CUB60HAC20DWT7A

• Indoor unit (boxed coil) : DEA60HOS20230E7

• Rated capacity : 60,000 BTU

• Refrigerant : R-410A

• Voltage : 220 V

• MCA : 40 A

• MOP : 50 A

• Piping : 3/8 – 3/4

The boxed coil plays a key role here. It allows for clean and structured integration above or below an existing furnace, which significantly simplifies installation and reduces the necessary mechanical adjustments. In several projects completed by our teams in Longueuil, Laval, and Boucherville, this approach has reduced intervention times while maintaining a professional and durable finish.

This type of configuration is particularly appreciated in buildings where mechanical space is limited, or when the client wishes to avoid invasive work.

Actual energy behavior and seasonal efficiency

Even though this model is not ENERGY STAR® certified, it remains an energy- balanced system, especially when its performance is analyzed in a real-world usage context.

Among the important indicators:

• SEER2 : 14.5

• EER2 : 8.6

• HSPF2 : 7.1

• COP in moderate winter conditions : stable and consistent for a system of this capacity

In practice, this means that the ELIOS "ADD-ON" 5T central heat pump offers realistic efficiency without compromising robustness. It is particularly suitable for projects where the priority is long-term reliability , compatibility with an existing installation, and stable comfort, rather than purely theoretical subsidy optimization.

At AirGreen, we have found that this type of system performs very well in contexts of variable load, particularly in multi-unit residential buildings or residences where occupancy fluctuates.

Acoustic comfort is often underestimated, but essential.

Noise is a factor too often overlooked when choosing a central heat pump. Yet, in dense residential areas of Montreal or Laval, the noise level of the outdoor unit can quickly become an issue for both residents and neighbors.

The ELIOS 5T central heat pump is distinguished by:

• an external noise level of approximately 62 dB(A) ,

• a side-exhaust design, more compact and better suited to confined spaces,

• a reduction of vibrations thanks to the progressive modulation of the Inverter compressor.

In several residential and multi-unit housing projects, this feature has allowed for installation without noise-related conflicts, while preserving interior comfort.

Control, compatibility and regulation options

The system is designed to operate with wired control and can be paired with the ELIOS KJR-120N thermostat , which offers a Wi-Fi option for remote control. This flexibility allows the system's management to be adapted to the occupants' actual habits, without imposing a rigid or oversized solution.

At AirGreen, we systematically analyze:

• compatibility with existing thermostats,

• the building zoning logic,

• the actual programming and control needs.

This approach helps avoid common mistakes, such as poor communication between the thermostat and an inverter system, or inadequate regulation that would harm overall efficiency.

Concrete examples of installations carried out by AirGreen

On the South Shore , we installed an ELIOS "ADD-ON" 5T central heat pump in an intergenerational home equipped with an existing electric furnace. The client wanted to improve summer air conditioning while reducing their winter electricity consumption.

After a full season of use, the observed results were clear:

• improved air distribution throughout the building,

• A significant reduction in the use of auxiliary heating.

• more consistent thermal comfort between floors.

In Laval , in a rental building, the compactness of the outdoor unit allowed for installation without major modification of the exterior layout, a determining factor for the owner.

Guarantee, durability and peace of mind

The ELIOS central heat pump comes with a 10-year warranty on the compressor and parts , with the option to add further protection depending on the project. While labor coverage is not included by default, our approach at AirGreen is based on rigorous installation , precise commissioning, and professional follow-up to minimize long-term risks.

Why entrust your core "add-on" project to AirGreen

Installing a 5-tonne "add-on" central heat pump requires much more than a simple equipment replacement. It requires:

• a detailed analysis of existing conduits,

• a rigorous electrical assessment

• a thorough understanding of inverter systems,

• commissioning adapted to the actual conditions of the building.

At AirGreen , we operate daily in Montreal, Laval, Longueuil, and on the North and South Shores. Our experienced refrigeration technicians are accustomed to this type of complex configuration and work with a methodical, transparent, and sustainability-oriented approach.

Contact AirGreen for your ELIOS central heat pump project

If you are considering installing an ELIOS R410A 5-tonne "ADD-ON" central heat pump with a boxed coil , or if you would like to confirm the compatibility of your existing system, our team is available to assist you. Contact AirGreen Heat Pumps, Air Conditioning & Heating for a complete analysis, a detailed estimate, and an HVAC solution truly tailored to your building.