An energy upgrade for an administrative building undergoing transformation
At AirGreen , we recently completed the full installation of an Elios DE18HIW19230S1 wall-mounted heat pump in an office building located in the heart of Montreal . This project was part of an energy modernization and increased comfort initiative for occupants, while also aiming for a significant reduction in operating costs .
The mandate was clear: replace an old, inefficient central air conditioning system with a compact, high-performance, and sustainable HVAC solution , adapted to the requirements of the service sector and compliant with safety and energy efficiency standards.
Project context
The building in question, a three-story administrative building dating from the 1980s, suffered from several recurring problems:
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Significant temperature fluctuations between zones.
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Excessive energy consumption during the summer period.
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Existing units have high noise levels.
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Lack of individual room-by-room control.
The building manager was looking for a flexible HVAC solution that would allow for zoned temperature control , simplified maintenance , and a rapid return on investment . After an energy study and a complete thermal survey conducted by our engineering team, the choice fell on a high-efficiency Elios wall-mounted inverter heat pump , ideal for this type of configuration.
Technical constraints and site requirements
The installation took place in an occupied environment, which imposed several constraints:
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Limited intervention windows (before 8am and after 5pm) to avoid any disruption to staff.
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Restricted wall space , requiring a custom installation of the refrigeration circuit.
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Restricted access to the electrical panel requires close coordination with a partner master electrician.
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Load-bearing wall made of reinforced concrete , requiring the use of specific anchors and reinforced anti-vibration insulation.
AirGreen planned all operations in coordinated phases , ensuring the continuity of administrative activities without interruption of service.
Technical solution implemented
The chosen system is based on:
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Elios DE18HIW19230S1 wall-mounted heat pump , ETL Intertek 307293 certified.
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208/230V – 60 Hz single phase power supply , with 15A fuse protection.
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Nominal pressure : 350 PSI high pressure side / 150 PSI low pressure side.
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Optimized heating and cooling capacity for an area of 65 to 75 m².
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Inverter technology for continuous power modulation according to thermal demand.
The discreet and elegant indoor unit was installed 2.3 meters from the ground to ensure even air distribution , while the outdoor unit was mounted on galvanized anti-vibration supports , ensuring the stability and durability of the system.
Construction progress
The work was carried out over three days:
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Preparation and securing of the area (electric lockout/tagout, tarpaulin covering of workstations, protection of walls).
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Installation of insulated copper refrigeration line (length 8.5 meters), with nitrogen leak test (350 PSI for 24h).
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Complete commissioning including pressure checks, air flow calibration and validation of supply and return temperatures.
Once the system was started, our technicians configured the Elios smart remote control , allowing precise temperature control and weekly programming, while explaining its operation to the building maintenance manager.
Results and performance indicators
The results were immediately noticeable:
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Improved thermal comfort in offices: stability to ±0.3 °C.
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A measured reduction of 27% in energy consumption compared to the old system.
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Significant reduction in indoor noise level (less than 32 dB).
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Total satisfaction of the occupants , who now benefit from individual control via remote control.
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Maintenance is made easier thanks to quick access to filters and a modular design.
Maintenance and remote monitoring
To guarantee long-term performance, AirGreen has integrated this heat pump into its commercial preventative maintenance program :
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Semi-annual inspection of pressures and connections.
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Cleaning of coils and antibacterial disinfection of filters.
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Energy monitoring via an annual performance report.
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24/7 support for any service call or alert detected by the system.
Each intervention is recorded in our AirGreen Pro customer portal , allowing the manager to view the complete maintenance history, technical reports and energy optimization recommendations.
Compliance and safety
The project was executed in strict compliance with the standards:
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CSA C22.2 (electrical safety).
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ASHRAE 62.1 (Indoor Air Quality).
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Quebec Building Code – Chapter V (Electricity) .
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Environmental regulations concerning the handling of refrigerant gases (R410A).
AirGreen, holder of a valid RBQ license , ensures that each installation complies with legal requirements and that a complete compliance report is provided to the client.
Return on investment and economic benefits
The initial investment was quickly recouped thanks to:
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A reduction in annual energy costs of approximately 30% .
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A reduction in TCO (total cost of ownership) over 10 years.
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An incentive bonus from Hydro-Québec of 15% of the installation cost for improving energy efficiency.
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A full 10-year warranty on the compressor and main parts, thanks to regular maintenance carried out by AirGreen.
Conclusion
This installation perfectly demonstrates AirGreen 's ability to offer customized commercial HVAC solutions combining technology, efficiency and sustainability .
Through careful planning, execution in accordance with the highest standards and proactive after-sales service, we support Montreal businesses in their energy transition and daily comfort.
AirGreen – Your trusted partner in commercial heating, ventilation and air conditioning in Montreal, Laval, Longueuil, on the North Shore and the South Shore.
High-performance, sustainable solutions tailored to each building.