A Delicate HVAC Project in a “Shoebox” House: Balancing Performance, Aesthetics, and Heritage Constraints
In one of Montréal’s residential neighborhoods known for its century-old “shoebox”-style houses, we were tasked with installing a central heat pump system in a setting that was at once compact, historically sensitive, and full of preservation requirements. At AirGreen, this kind of challenge is precisely where our expertise shines. The goal wasn’t simply to install a high-performing unit, but to hide it seamlessly while preserving the unique look of the façade and maximizing energy efficiency.
The Challenges of a Heritage Home in Montréal
Shoebox homes are typically single-story buildings, with flat roofs and brick or stone façades that are often classified or protected by municipal regulations. Installing an HVAC system in these homes means strictly adhering to urban planning and visibility rules.
In our case, absolutely no alterations could be made to the front façade—not even a single drilled hole. The outdoor space was extremely limited. We therefore had to design a fully custom integration solution, working closely with the architect hired by the homeowners and following the guidelines laid out by the City of Montréal.
Choosing the Right Equipment: Efficiency, Discretion, and Compatibility
After a complete thermal analysis of the home (approximately 1,200 square feet), our team recommended installing a Goodman R-32 2.5-ton central heat pump, known for its reliability, high seasonal efficiency (SEER 17, HSPF 10), and flexibility with existing or custom ductwork.
The choice of R-32 refrigerant, which is more environmentally friendly than previous generations, was also key—it offers lower emissions and improved performance, especially in Québec’s winter conditions.
A Custom Installation With No Demolition Required
Custom Ductwork Design
The low ceilings and load-bearing walls made it nearly impossible to run conventional ducts. Our technicians therefore designed a low-profile ducting system, hidden along the upper corners of certain rooms, with custom air vents that blend seamlessly into the interior design.
Outdoor Integration: Practically Invisible
To hide the outdoor unit, we partnered with a local carpenter to build a ventilated cedar enclosure, painted to match the house’s color palette. This structure complied fully with ventilation and service access requirements, while making the unit virtually invisible from the street.
Noise Control
In a dense neighborhood like this one in Montréal, noise from the outdoor unit is a major concern. The installed Goodman heat pump produces just 55 decibels, roughly the same as a quiet dishwasher. Additionally, the cedar enclosure was soundproofed inside, which helped minimize disturbances for nearby neighbors.
LogisVert Grant and Energy Efficiency
Thanks to its certified energy efficiency and use of R-32 refrigerant, this installation qualified for a $2,032 LogisVert grant. Our advisors guided the clients through every step of the administrative process, significantly reducing the total project cost.
Customer Testimonial
“We were sure a system like this would ruin the look of our house. But AirGreen found solutions no other company had offered. It’s beautiful, discreet, efficient… and we’ve already started noticing a drop in our electricity bills.”
What Makes This Project a Model Case
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Architectural adaptation without compromising performance.
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Complete discretion for the outdoor unit, fully compliant with city regulations.
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Custom low-profile ductwork for tight structural spaces.
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Easy maintenance, no complicated technician access.
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Noticeable energy savings from the very first month.
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Outstanding noise reduction in a densely populated urban environment.
Why Choose AirGreen for Projects Like This?
At AirGreen, we know that every HVAC installation in Montréal, especially in heritage or architecturally significant homes, requires specialized know-how, careful listening, and total technical mastery. This project proves it: a fully successful integration, no compromises, respecting both the home’s charm and modern energy standards.
Practical Tips for Owners of Older Homes
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Be aware of heritage constraints: check with your borough before any project.
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Work with an installer experienced in older, tight-space homes.
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Think insulation: even the best heat pump performs better with solid insulation.
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Prioritize R-32 or R-454B units for top performance and grant eligibility.
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Request a personalized energy analysis before purchasing your equipment.