Elios ADD-ON Central Heat Pump | Cased Coil | 36000 BTU | -25°C

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A central ADD-ON solution specifically adapted to existing buildings in Quebec

In Quebec, a large proportion of residential and multi-unit buildings still rely on central electric or hybrid heating systems installed many years ago. Completely replacing these systems is often complex, expensive, and impractical. It is precisely in this context that the Elios ADD-ON Central Heat Pump with coil and 36,000 BTU enclosure becomes so valuable.

At AirGreen, we regularly install this type of central ADD-ON solution in Montreal , Laval , Longueuil , as well as on the North and South Shores , because it allows for the intelligent modernization of an existing system. The goal is not to redo everything, but to optimize what is already in place, while tangibly improving comfort, thermal stability, and energy efficiency.

The ADD-ON principle is simple in appearance, but technically demanding. It involves integrating a high-performance central heat pump into an existing infrastructure: electric furnace, plenum, ventilation ducts, and electrical supply. Choosing a cased coil is crucial here. It ensures cleaner mechanical integration, minimizes air loss, and reduces the need for makeshift adjustments that often negatively impact the overall system performance.

A design conceived for real cold, not for ideal conditions.

Quebec winters leave no room for error. A central heat pump must be able to deliver stable performance when the temperature drops well below zero, without constantly relying on an energy-intensive backup heating system.

The 36,000 BTU version of the ADD-ON Elios central heat pump is designed to operate efficiently down to -25°C in heating mode , reflecting the climatic conditions we encounter in the field. In several projects completed by AirGreen, particularly in Laval and on the South Shore, this operating threshold has proven crucial in reducing reliance on electric heating elements during periods of extreme cold.

Advanced inverter technology, combined with the HEAT+ architecture, allows the unit to continuously adjust its power output. Unlike older central systems with binary (on/off) operation, this constant modulation enables:

• a more stable indoor temperature, without sudden variations

• a reduction in short cycles, which are responsible for premature wear

• better humidity control during seasonal transitions

• energy consumption better distributed over time

In practice, this translates into more uniform comfort between rooms and floors, a point frequently raised by owners of multi-storey houses and plexes in Montreal and Longueuil.

The key role of the coil WITH housing in a successful ADD-ON installation

The coil with its casing is often underestimated when choosing a central heat pump. Yet, in an add-on system, it plays a fundamental role in the system's reliability and performance.

In the HVAC installations we carry out at AirGreen, this type of coil allows for:

• improved sealing between the coil and the existing plenum

• a reduction of air leaks, often responsible for efficiency losses

• a more rigid and durable mechanical integration

• a reduction in vibrations and unwanted noise

• easier access during HVAC maintenance operations

The GUHEA36RCAS1 indoor unit, with its well-controlled dimensions ( 19.65 × 22.74 × 20.4 inches ), integrates more easily into existing mechanical rooms, including older buildings where space is limited. During our site visits, we systematically verify these constraints to avoid any unnecessary structural modifications.

Technical features that have a real impact on everyday life

Beyond the numbers, it's the concrete results that count. Here's how the key technical specifications of this ADD-ON Elios central heat pump translate into the reality of the buildings we service:

Capacity and power

• 36,000 BTU (3 tonnes) in air conditioning
  Suitable for medium-sized single-family homes, large condos, and full floors of plexes.

• 25,200 BTU at -8°C in heating mode
  Allows you to maintain a high level of comfort during periods of sustained cold.

• 26,400 BTU at -15°C
  Significant reduction in the use of auxiliary electric heating in hybrid systems.

Refrigerant and safety

• R-454B (A2L)
  Next-generation refrigerant with reduced environmental impact, accompanied by an integrated leak detection system, enhancing system safety and reliability.

Acoustic comfort

• 63 dB(A) for the outdoor unit
  A controlled noise level, particularly appreciated in the dense residential areas of Montreal and the South Shore.

Compatibility and installation

• 3/8 – 3/4" Piping
  Standard dimensions facilitate replacement during ADD-ON projects, without complete reconstruction of refrigeration lines.

These elements are part of the criteria that we analyze at AirGreen before recommending this model to our clients, in order to ensure consistency between expectations, the building and the proposed solution.

Concrete examples of installations carried out by AirGreen

In Laval, a client owned a single-family home heated exclusively by electricity. Despite adequate insulation, winter energy costs remained high, and comfort levels varied between the basement and the upper floor. Installing an ADD-ON Elios 36,000 BTU central heat pump stabilized the temperature throughout the house while significantly reducing electricity consumption from the very first heating season.

On the South Shore, in a duplex, the owner was facing recurring complaints about noise and temperature fluctuations. Choosing a coil with a casing, combined with a compact horizontal discharge outdoor unit, allowed for a discreet and quiet installation without compromising the building's exterior aesthetics.

Critical points to monitor during an add-on project

Even with high-quality equipment, certain errors can limit the performance of a central ADD-ON system:

• an inadequate dimensioning in relation to the actual volume of the building

• poor integration of the coil into the existing plenum

• an unchecked or poorly balanced airflow

• the lack of adjustments after commissioning

At AirGreen, we systematically integrate these steps into our HVAC installation process, because it is precisely these details that make the difference between a merely functional system and a truly high-performing system in the long term.

Reliability, guarantees and peace of mind

The ADD-ON Elios central heat pump comes with a 10-year warranty on the compressor and parts , with additional protection options. For many residential and commercial customers in Montreal, Laval, and Longueuil, this coverage is a significant deciding factor, particularly for durability and cost predictability.

The availability of parts and technical support also constitute a concrete advantage for after-sales service, an aspect that we consider essential in all our recommendations.

Why choose AirGreen for installation

Installing an ADD-ON central heat pump is not simply a matter of connecting components. Each building presents its own constraints: existing ductwork, insulation, consumption habits, mechanical configuration.

At AirGreen, our approach is based on:

• a complete analysis of the existing system

• in-depth field expertise in central HVAC installation

• clear and transparent offers

• a detailed knowledge of the climatic realities of Montreal , Laval , Longueuil , North Shore and South Shore

It is this comprehensive approach that allows the ADD-ON Elios central heat pump to deliver its true performance, day after day, winter and summer.

Conclusion

The Elios ADD-ON Central Heat Pump | Coils WITH Enclosure | 36,000 BTU | -25°C represents a coherent and sustainable solution for modernizing an existing central system without compromising on comfort or reliability. It meets Quebec's climate requirements while integrating effectively with existing infrastructure.

To verify the compatibility of this model with your building, obtain a detailed quote, or discuss an HVAC installation project, contact AirGreen directly. Our team will support you at every stage, from technical analysis to complete commissioning.

Contact AirGreen today for a personalized assessment and an HVAC solution perfectly suited to your needs.