Optimizing comfort and energy efficiency in a Montreal plex
At AirGreen , we recently installed a wall-mounted MultiZone heat pump in a plex in the Rosemont–La Petite-Patrie neighborhood of Montreal . The building, typical of this area with its brick facade, had specific features that required careful planning of the HVAC installation. Our goal was to provide occupants with a heating and cooling solution that combines comfort, energy savings, and reliability all year round.
Choosing a MultiZone System for a Residential Building
In Montreal plexes, each floor may have different comfort needs. Choosing a wall-mounted MultiZone heat pump allows you to connect multiple indoor units to a single outdoor condenser, which provides:
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Independent temperature management in each home or room.
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A reduction in the visual and sound footprint outside thanks to a limited number of compressors.
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Optimal energy performance, especially when the equipment is Energy Star certified.
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Better integration into energy subsidy programs offered to homeowners in Montreal, Laval, Longueuil, as well as on the North Shore and South Shore.
Technical details and flat roof configuration
This installation took place on a flat roof with ladder access, a common scenario in Montreal plexes. We installed several condensing units on metal supports adapted to roofs , which allows:
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Better air circulation around the units.
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Protection against accumulated snow in winter.
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Effective stabilization thanks to robust anchors and distribution slabs.
The refrigerant and electrical lines were carefully routed along the brick facade and then connected to the respective dwellings. To preserve aesthetics and durability, we applied a waterproofing treatment around each opening.
Challenges encountered and solutions applied
Installing a MultiZone heat pump in an older complex always involves specific challenges:
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Masonry drilling management : to protect the structure, our technicians used diamond drill bits and applied a weather-resistant sealant.
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Length of refrigerant pipes : the distance between the indoor units and the roof required precise planning in order to comply with the manufacturers' recommendations to avoid any loss of efficiency.
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Safety on adjacent sloped roof : we have implemented a secure work plan including temporary anchors and the use of specialized equipment to ensure a safe and compliant installation.
Results obtained for occupants
From the moment it was put into service, the building's occupants benefited from several advantages:
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Personalized comfort thanks to independent management of each wall unit.
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A reduction in energy consumption , particularly in heating during Montreal's cold winters.
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A significant reduction in external noise compared to installations with multiple condensers.
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An aesthetic and sustainable solution that fits well into a dense urban environment.
AirGreen expertise for multi-residential buildings
At AirGreen, we understand that every HVAC project in Greater Montreal requires a personalized approach. For plexes and multi-residential buildings in neighborhoods like Rosemont, Villeray, or the Plateau, installing a wall-mounted MultiZone heat pump is an ideal solution for combining efficiency, comfort, and respect for the existing architecture .
Our technicians are experts in the specifics of this type of project, from flat roof safety to multiple connections, guaranteeing reliable and optimized installations.
Conclusion
This installation in Rosemont–La Petite-Patrie demonstrates our expertise in implementing MultiZone systems tailored to Montreal plexes. Through meticulous planning, specialized drilling techniques, and a constant focus on performance, AirGreen continues to support homeowners in Montreal, Laval, Longueuil, as well as the North and South Shores, toward sustainable and cost-effective HVAC solutions.