Improving the energy efficiency of a commercial building is a challenge we tackle every day with passion, precision, and expertise. At AirGreen, our experience in commercial heating systems allows us to deliver real, measurable solutions—as demonstrated by our recent project in Longueuil, where we cut the energy costs of an office building in half by completely overhauling the HVAC system.
A clear request: reduce costs without compromising comfort
Our client, a property manager responsible for a three-story office building in the heart of Longueuil, contacted us with a specific goal: dramatically lower their energy bills, which had skyrocketed in recent years, while maintaining optimal thermal comfort for both employees and visitors.
Following a detailed energy assessment of the existing setup, we quickly identified several weaknesses in the system: an aging gas boiler, poorly insulated ductwork, and unsynchronized thermostats. We proposed a comprehensive solution: replacing the central heating system with a high-performance central heat pump and upgrading the entire control system.
Our solution: a Bosch BOVA 36 central heat pump + smart control system
After evaluating the building’s heating and cooling needs, we recommended the installation of a Bosch BOVA 36 system, a central inverter heat pump with a capacity of 36,000 BTU, using the new eco-friendly R-454B refrigerant. This choice stood out for several reasons:
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Excellent energy efficiency (SEER 20 / HSPF 10)
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Optimal performance in cold temperatures, ideal for the South Shore climate
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Significant reduction in greenhouse gas emissions
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Compatible with smart control systems for remote management
We paired the system with a centralized smart thermostat, enabling precise scheduling for each building zone and remote supervision by the property manager.
Installation process: precision, efficiency, and adaptability
The installation was completed in four working days, with no disruption to office operations. We carefully coordinated the work floor by floor, adapting our schedule to off-peak hours.
Key steps of the project:
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Complete removal of the outdated natural gas system
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Redesign of the mechanical room to accommodate the new indoor unit
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Installation of insulated flexible ducting, reducing thermal losses
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Mounting of the Bosch outdoor unit on anti-vibration wall brackets
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Integration of smart sensors in each office space
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Full system testing, airflow calibration, and performance verification
Immediate results: 53% reduction in energy bills
Within the first month post-installation, the impact was clear: the building’s monthly energy bill dropped by 53% compared to the same period the previous year. In addition to the financial savings, occupants reported a significant improvement in thermal comfort, thanks to more consistent temperatures and less ambient noise.
Hydro-Québec LogisVert Grant: up to $4,800 reimbursed
Thanks to the technology used (R-454B refrigerant, high-efficiency inverter compressor), this project was eligible for the Hydro-Québec LogisVert commercial grant. We supported our client throughout the administrative process, enabling them to recover nearly $4,800 in subsidies.
Why this project is a model for other commercial buildings in Longueuil
This project is a textbook example of our strategic approach to HVAC: a precise evaluation of the building’s needs, technological choices tailored to Québec’s climate, and a carefully executed installation, coordinated and stress-free for the client.
We also used this installation as an opportunity to provide remote training to the building’s maintenance team on how to use the new connected thermostats, allowing for complete management autonomy of the system.
Tips for commercial building managers
Here are a few key takeaways from this project for any property owner or manager:
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Regularly assess your HVAC system’s performance, especially if it's over 10 years old.
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Invest in a high-efficiency central heat pump—the upfront cost pays off quickly.
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Work with a certified professional like AirGreen to confirm your eligibility for available financial assistance.
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Consider your occupants' comfort—a well-performing system improves productivity by eliminating temperature discomfort.
The AirGreen difference: your partner in energy efficiency
At AirGreen, we understand that every commercial building is unique. That’s why we provide a personalized approach, from the initial assessment to complete system installation, ongoing maintenance, and long-term optimization. With our deep knowledge of available grants, we help our clients make the right technical and financial decisions.
Our work in Longueuil is just one of many examples. Whether you're located in Montréal, Laval, the North Shore, or the South Shore, we’re ready to transform your building into a benchmark for energy efficiency.