ELIOS R410A "ADD-ON" Central Heat Pump | 2.5T - Cased Coil

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A central heat pump designed for existing systems and the actual climate of Quebec

At AirGreen, we have been installing, repairing, and optimizing central HVAC systems for over fifteen years in Montreal , Laval , Longueuil , and on the North and South Shores. The ELIOS R410A | 2.5T "ADD-ON" central heat pump with boxed coil is perfectly suited to the needs of many Quebec buildings: single-family homes, duplexes, triplexes, and multi-unit buildings already equipped with a functional ductwork system.

This model was designed with a logic of intelligent improvement in mind. Rather than demolishing, replacing or rebuilding a complete system, it allows for the improvement of an existing installation , increasing its energy efficiency and stabilizing its comfort, while respecting the technical and budgetary constraints of the owners.

In practice, this is a solution we often recommend when the air distribution is adequate, but the thermal performance or electrical consumption no longer meets current expectations.

Understanding the "ADD-ON" logic in a real-world HVAC project

An approach adapted to homes already equipped with ducts

In many of the projects completed by AirGreen, particularly in Anjou , Saint-Léonard , Terrebonne and Brossard , clients already have:

• from a central plenum,

• of properly sized conduits,

• of an existing electric or dual-energy heating system.

The ELIOS central heat pump's ADD-ON configuration allows for direct integration into the existing system , without altering the building's architecture or compromising air distribution. The boxed coil facilitates a clean, airtight, and durable connection, while adhering to best HVAC practices.

In practice, this approach translates into:

• fewer invasive procedures,

• a faster and cleaner construction site

• a reduction in indirect costs,

• a more predictable commissioning.

Heating performance designed for Quebec winters

Stable heating down to -30°C

The climate of Montreal , the North Shore , and the Montérégie region imposes demands that few central systems can truly meet over the long term. The ELIOS ADD-ON central heat pump is designed to maintain reliable heating performance down to -30°C , without a sudden drop in capacity.

In installations carried out by AirGreen, this stability is particularly appreciated during:

• prolonged cold spells,

• very cold nights combined with wind,

• periods when the heat pump becomes the main source of heating.

Thanks to HEAT+ technology, the system maintains high capacity at low temperatures, which limits the need for backup sources and improves energy cost control.

Inverter technology: continuous comfort and controlled energy consumption

Precise modulation, no unnecessary cycles

The inverter compressor integrated into this model adjusts its power progressively, in very fine increments. Unlike traditional systems that operate in on/off mode, this modulation allows:

• a more stable indoor temperature

• fewer sudden starts and stops,

• a reduction in mechanical wear,

• a decrease in annual electricity consumption.

In homes in Laval and Longueuil where we replaced old central systems, occupants quickly noticed the difference: less temperature variation, more homogeneous air and significantly quieter operation.

Key technical data interpreted in a concrete way

Realistic capacity and sizing

With a rated power of 30,000 BTU (2.5 tonnes) , this model is perfectly suited to medium-sized residences, often between 1,200 and 2,000 square feet depending on the insulation, orientation and airtightness of the building.

Some important technical points:

• Air conditioning capacity : 30,000 BTU

• Heating capacity at -8°C : approximately 19,600 BTU

• Heating capacity at -15°C : approximately 22,600 BTU

• SEER2 : 15.2

• HSPF2 : 8.5

• High COP in winter conditions

At AirGreen, we always insist on a precise thermal load calculation , because good performance depends as much on the product as on its sizing and installation.

Noise level and quality of life

A discreet central system, both indoors and outdoors

With an outdoor noise level of approximately 62 dB(A) , the ELIOS central heat pump offers a significant advantage over many traditional central systems. In dense residential areas such as Villeray , Ahuntsic , or Old Longueuil , this criterion is often a deciding factor.

Inside, the combination of the Inverter motor and the well-controlled airflow allows for smoother operation, without excessive whistling or vibrations in the ducts, provided that the installation is carried out correctly.

Concrete examples of AirGreen installations

1990s bungalow in Laval

In a typical Laval bungalow, the client wanted to improve their winter comfort while keeping their existing electric heating. We installed the ELIOS R410A | 2.5T "ADD-ON" central heat pump , adjusted the coil, verified the electrical capacity ( MCA 30A, MOP 50A ), and optimized the airflow.

Result observed after a full season:

• improved thermal stability

• reduction in peak consumption,

• access to the LogisVert grant of $2,352 ,

• Significant reduction in outside noise.

Intergenerational housing in Boucherville

In a multigenerational home on the South Shore , the goal was to achieve consistent comfort across two levels with different heating needs. Inverter modulation allowed for a gradual adjustment of power, avoiding the frequent temperature fluctuations associated with the old central system.

Technical points that we systematically check before installation

Each AirGreen project includes a complete analysis:

• condition and tightness of the ducts,

• compatibility of the plenum with the boxed coil ,

• pipe length and diameter (3/8 – 3/4)

• electrical capacity available at 220 V ,

• requirements for auxiliary electric resistance (5 to 25 kW depending on the building),

• optimal positioning of the outdoor unit to reduce noise and improve maintenance.

These checks help to avoid common errors: oversizing, short cycles, excessive condensation or lower than expected performance.

Long-term reliability and recommended maintenance

The ELIOS central heat pump is designed to operate stably year-round, even in demanding weather conditions. It is covered by:

• 10 years on the compressor

• 10-year warranty on parts

• 0 years on labor , with the option of an additional warranty

At AirGreen, we always explain these elements transparently and offer a suitable HVAC maintenance plan :

• annual inspection

• coil cleaning

• checking pressures and connections,

• calibration of wired or WiFi thermostat (optional).

Regular maintenance prolongs the life of the system and maintains its energy performance.

Why entrust this project to AirGreen?

We only recommend systems we know in depth. This ELIOS central heat pump is one of the models we carry:

• installed in different types of buildings,

• followed over several seasons,

• evaluated under real-world Quebec conditions.

Our approach is based on:

• clear and detailed pricing ,

• certified and experienced refrigeration technicians ,

• concrete field expertise,

• $5,000,000 liability insurance

• support before, during and after installation.

Conclusion

The ELIOS R410A | 2.5T "ADD-ON" Central Heat Pump - Box Coil represents a coherent, reliable and durable solution for homeowners wishing to optimize an existing central system , improve their winter comfort and reduce their energy consumption without unnecessary work.

For a complete technical assessment , a precise heat load calculation , or a detailed quote , contact AirGreen Heat Pumps, Air Conditioning & Heating . We serve Montreal , Laval , Longueuil , the North Shore , and the South Shore , with the same rigor and attention to detail on every project.