A CVAC installation feat in a century-old home in the Plateau-Mont-Royal
Transforming a century-old house into a haven of modern thermal comfort without altering its architectural charm—that’s the challenge we proudly took on with the installation of a high-end central heat pump by Bosch in the iconic Plateau-Mont-Royal neighborhood of Montréal. In this case study, we walk you through an intervention where cutting-edge CVAC technology meets a customized approach, showcasing our expertise in complex residential projects.
Context: balancing architectural heritage with modern thermal comfort needs
The century-old homes of the Plateau-Mont-Royal are known for their distinct architecture, vintage woodwork, and stone load-bearing walls. While their charm is undeniable, they do present real technical challenges in terms of heating, ventilation, and air conditioning. The owner of this three-story residence, concerned about Montréal’s harsh winters and increasingly hot summers, reached out to us for a central comfort solution that wouldn’t compromise the home’s historical aesthetics.
Project Objective: an energy-efficient, discreet central heat pump
The mission was clear: integrate an efficient, quiet central heat pump eligible for government grants, all while preserving the building’s structural and visual integrity. We proposed the installation of the Bosch BOVA 36 Premium IDS with R-454B refrigerant, a system renowned for its outstanding performance in cold climates and its compatibility with the constraints of older homes.
Why the Bosch BOVA IDS 36 R-454B? A technical and strategic choice
-
Power: 36,000 BTU, ideal for this over 2,500 sq. ft. residence spread across three floors.
-
Inverter Technology: smart modulation for quiet operation and maximum energy efficiency.
-
R-454B Refrigerant: more eco-friendly, with a lower global warming potential (GWP).
-
Winter Performance: certified to operate efficiently at temperatures as low as -25°C.
-
Grant Eligibility: this system allows the client to receive a $5,000 LogisVert grant from Hydro-Québec for single-family homes.
Installation steps: precise coordination in a complex environment
Initial inspection and custom design
First, our team carried out a comprehensive thermal diagnosis of the home. Using thermal imaging analysis, we pinpointed areas of heat loss and confirmed the installation’s feasibility without impacting heritage features.
We then designed a custom air distribution plan, utilizing existing spaces (closets, false ceilings, unused ducts) to minimize visual disruption.
Delivery and site preparation
The worksite was carefully prepared beforehand:
-
Full protection of woodwork, moldings, and vintage flooring.
-
Coordination with a heritage architect hired by the client to validate our approach.
-
Delivery of the Bosch outdoor unit, discreetly placed in the backyard with reinforced acoustic insulation.
Technical installation
-
The indoor unit was installed in the basement, with centralized air distribution using insulated rigid ductwork.
-
Discreet air diffusers were integrated into the ornate ceilings, finished to match the existing décor.
-
A multi-floor zoning system was implemented to optimize comfort based on room use (e.g., bedrooms upstairs, kitchen on the main floor).
-
Installation of a Wi-Fi smart thermostat allowing scheduling based on the client’s lifestyle.
Challenges faced and solutions provided
Challenge: no false ceilings in the old structure
We used custom-made flat galvanized steel ducts and ran them through hollow party walls to deliver airflow without demolition.
Challenge: noise level
Thanks to Bosch anti-vibration mounts and smart placement of the outdoor unit behind a wooden fence with soundproofing treatment, noise is virtually undetectable.
Challenge: excess basement humidity
We integrated a heat recovery ventilator (HRV) system paired with the heat pump to ensure clean, dry, and tempered air, reducing the risk of mold growth.
Results: comfort, efficiency, and heritage enhancement
-
A stable and pleasant temperature throughout the house, year-round.
-
An estimated 35% reduction in annual energy costs, based on the client’s comparative records.
-
A property value boost, achieved through a major CVAC upgrade without compromising the home’s character.
Client testimonial: the owner’s perspective
“The challenge was huge: I wanted a modern solution, but I refused to let my home lose its soul. The AirGreen team was outstanding. Discreet, efficient, attentive. And most importantly, they respected the history of my house. Thank you!”
Why choose AirGreen for your CVAC installation in an older home?
At AirGreen, we excel in complex projects where respecting the original character is just as important as technical performance. Thanks to our field experience and personalized approach, we deliver central heat pump installations that meet today’s standards while honoring yesterday’s heritage.
Our similar projects across Greater Montréal
-
Laval: Bosch IDS 2.0 central heat pump installed in a 1950s cottage, with indoor unit adapted into a laundry room.
-
Longueuil: Central Goodman system installed in a bungalow with an attic converted into living space.
-
South Shore: Fujitsu central heat pump in a century-old duplex in Saint-Lambert with dual-floor zoning.
-
North Shore: Trane central unit installed in a remote Blainville residence with integration to existing propane heating system.
Practical tips for older homes
-
Avoid fully electric systems without a prior thermal assessment: older homes often have weak insulation.
-
Choose an Inverter system that adapts to indoor temperature fluctuations.
-
Go with experienced installers who understand heritage constraints and know how to work with vintage materials.