Real savings thanks to a custom HVAC solution for a residential building in Longueuil
In Longueuil, on Montréal’s South Shore, the owner of a multi-unit building was facing a major challenge: heating costs that had become unsustainable over the winters. The aging central system, energy-hungry and inefficient, no longer met the comfort needs of the tenants or the modern energy performance standards. That’s when he reached out to AirGreen, a company specializing in turnkey HVAC solutions across Greater Montréal, to transform the situation. The result: heating bills cut in half in just the first winter.
Initial assessment: an outdated system and major energy losses
When we were called in, the building — a three-storey triplex located in a residential area of Longueuil — was equipped with an old oil-based central heating system. In addition to generating excessively high monthly bills, the system didn’t distribute heat evenly between the units.
After a full thermal inspection and a 24-month consumption analysis, we identified several aggravating factors:
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Poorly insulated ventilation ducts
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An outdated boiler with under 70% efficiency
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No individual control over heating in each unit
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No built-in air conditioning for the summer season
The solution proposed by AirGreen: High-efficiency multi-zone central heat pumps
To address the building’s specific needs while optimizing available grant programs, we recommended installing two Bosch BOVA 36-18M20M central heat pumps using inverter technology, combined with multi-zone ducted units. This solution allowed for tailored adaptation in each unit, with independent control and a significant reduction in energy consumption.
Why this model?
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Inverter Technology: Automatically adjusts output based on real-time heating or cooling demand
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Energy Efficiency: SEER rating of 18 and HSPF above 10, ensuring top performance year-round
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Grant Eligibility: Qualifies for the LogisVert rebate from Hydro-Québec, reducing the overall installation cost
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Quiet and Discreet: Perfect for residential environments
Installation process: precision, efficiency, and adapting to existing infrastructure
The installation took five business days, in close collaboration with the building owner to minimize disruptions for tenants. Here’s a breakdown of our process:
Day 1: Removal of the old oil-based system
We fully removed the existing boiler, safely evacuated the oil tank (in compliance with environmental standards), and decommissioned the obsolete ductwork.
Days 2-3: Installation of insulated ducts and the Bosch outdoor unit
We installed a new network of ducts insulated with reflective thermal fiber to minimize heat loss. The outdoor unit was installed on an elevated concrete base, frost-resistant, with a reinforced snow guard.
Day 4: Installation of indoor units and smart thermostats
Each apartment was equipped with a connected programmable thermostat, allowing tenants to control their own comfort independently. The indoor units, installed in drop ceilings, ensure even temperature distribution.
Day 5: Testing, calibration, and owner training
We ran full operational tests, measured airflow rates, checked refrigerant pressures, and trained the owner on system use and recommended maintenance.
Tangible results: savings, improved comfort, and increased property value
From the very first month after installation, the results spoke for themselves:
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Average energy bill reduction of 52% compared to the previous winter
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Notable increase in tenant satisfaction: stable temperatures, low noise levels, healthier air thanks to built-in filtration
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Increase in rental value: the owner was able to justify a small rent adjustment thanks to the addition of high-performance air conditioning
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Access to a $4,760 rebate through the LogisVert program, covering nearly 25% of the total investment
Client testimonial: a smooth partnership with AirGreen
“I compared several quotes. AirGreen immediately gave me confidence. They adapted their solution to the structure of my building and stuck to the timeline. Thanks to them, I reduced my energy expenses and increased my property’s value.”
— Mr. Lavoie, building owner in Longueuil
Why choose AirGreen for your HVAC projects in Longueuil and the South Shore?
At AirGreen, we take pride in offering custom HVAC solutions, integrating the best technologies on the market, all while respecting regulations, timelines, and customer comfort. Our expertise spans the South Shore, Longueuil, Montréal, Laval, and the North Shore, for all types of buildings: single-family homes, rental properties, commercial buildings, and condos.
Our distinct advantages:
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Expertise in central and wall-mounted heat pumps across multiple brands: Fujitsu, Gree, Bosch, Sharp, Trane, and more
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Turnkey service: evaluation, installation, commissioning, and maintenance
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Assistance with government rebates
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Fast and professional technical support post-installation
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A proven track record of successful projects across Greater Montréal
Practical tips for rental property owners
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Have your systems inspected every 5 years: an aging setup can cost you up to 30% more annually
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Consider zoning: each unit should have independent control over thermal comfort
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Choose ENERGY STAR certified heat pumps that qualify for local rebate programs
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Be mindful of outdoor noise: modern heat pumps are quiet, but proper placement is still crucial
Are you a property owner in Longueuil, on the South Shore, or anywhere in Greater Montréal and seeing your energy costs skyrocket? Contact us today for a free evaluation. At AirGreen, we turn your energy challenges into long-term savings.