Near-silent efficiency in the field: a look at our multizone installations in Montréal
At AirGreen, we’re often asked the same recurring question when installing multizone heat pump systems: can a multizone heat pump truly be quiet—especially in an urban environment like Montréal? Thanks to evolving HVAC technologies and our years of experience in the field, we’ve had the opportunity to test and compare several models in real-life conditions. Today, we’re sharing concrete results from our installations to answer this question with precision.
Understanding what a multizone heat pump is
A multizone heat pump allows you to heat or cool multiple rooms independently using a single outdoor unit connected to several indoor wall units. This type of system is especially suitable for multi-storey homes, condos, or dwellings where comfort needs vary from room to room.
Brands we frequently install — Fujitsu, Gree, Haxxair, Bosch, Goodman, Tosot, and Lennox — offer a wide range of multizone systems. The challenge, however, lies in combining energy performance, sound discretion, and long-term reliability.
Strict technical criteria for evaluating noise levels
At AirGreen, we assess several elements before determining a system’s sound quality:
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Indoor unit decibels (dB(A))
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Outdoor unit noise level at full power
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Wall/ceiling resonance (in complex installation cases)
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Perceived sound in a quiet residential setting (at night, in bedrooms, etc.)
We conducted field tests across several boroughs of Montréal, including Rosemont–La Petite-Patrie, Villeray–Saint-Michel–Parc-Extension, and Le Sud-Ouest, to assess real-world performance of the latest generation multizone heat pumps.
Case Study #1: Installation of a Gree Free Match multizone heat pump in Villeray
We recently installed a Gree Free Match (GMV Multi-Zone 24,000 BTU model) in a duplex located in Villeray. The setup included:
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One outdoor unit mounted on a wall bracket at the rear of the building
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Three indoor wall-mounted units (2 x 9,000 BTU + 1 x 12,000 BTU)
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A vibration kit and exhaust silencer
Results:
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Measured noise level in night mode: 22 dB(A) in bedrooms
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No perceptible noise within 3 meters of the outdoor unit
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Residents highly satisfied with the silence, even during summer heatwaves
This model also qualifies for the $1,704 LogisVert grant from Hydro-Québec, making it both a cost-effective and comfortable solution.
Case Study #2: Fujitsu KWL multizone heat pump in Côte-des-Neiges
A family wanted to improve comfort in their two-storey single-family home while keeping things quiet—especially in the bedrooms. We opted for a Fujitsu KWL multizone heat pump (36,000 BTU) with four wall-mounted indoor units.
Challenges:
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Poor acoustic insulation between rooms
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Complex installation with corner wall penetrations
Solutions we implemented:
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Added acoustic sleeves on refrigerant lines
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Wall-mounted bracket with anti-vibration isolation for the outdoor unit
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Night mode calibration for gentle modulation
Final result:
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No noise complaints after 3 months of use
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Noticeable reduction in electricity bills
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Outdoor noise level at full speed: 52 dB(A), barely noticeable
What makes a multizone heat pump truly quiet?
Our installations have helped us identify the essential criteria for ensuring optimal quietness:
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Model selection: some brands offer variable-speed (inverter) compressors that are significantly quieter
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Installation quality: poor anchoring or poorly planned line routing can cause vibration and resonance
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Noise-reducing accessories: anti-vibration mounts, air silencers, line dampeners
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Smart programming: night, eco, and low-frequency modes reduce perceptible sound
Multizone installation on the South Shore: Bosch BOVA 36k BTU heat pump in Longueuil
Another real-life example: a Bosch BOVA multizone installation in a home in Longueuil. Three zones were configured (living room, basement, master bedroom) using a single outdoor compressor.
We noted that the Bosch compressor, with its R-454B refrigerant, was not only energy-efficient but also remarkably quiet, even at full load.
Key aspects of the job:
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Proper spacing between units for acoustic efficiency
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Slab-mounted outdoor unit with vibration-damping pads
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Smart scheduling to avoid noisy cycles
The client reported: “Even at night, with the windows open, you hear nothing.”
Our recommendations for thermal comfort without noise pollution
To enjoy maximum acoustic comfort, here are our practical tips:
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Stick with reputable brands known for quiet technology (Fujitsu, Gree, Bosch)
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Work with a certified installer like AirGreen: expertise makes all the difference
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Avoid noisy locations (like directly under a bedroom window)
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Ask about customization options (night mode, acoustic filters, dampeners)
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Evaluate available grants (Hydro-Québec, LogisVert, RénoClimat)
Why trust AirGreen with your multizone heat pump?
At AirGreen, we don’t just sell and install HVAC systems — we deliver tailored solutions, adapted to your comfort, constraints, and expectations. Our teams serve Montréal, Laval, Longueuil, the North Shore, and the South Shore, with a constant focus on quality, quiet operation, and efficiency.
Every installation begins with an acoustic analysis, a personalized setup plan, and a post-installation evaluation to ensure your system runs at peak performance.
Conclusion: yes, a quiet multizone heat pump is absolutely possible
Thanks to technological advances and our expertise in HVAC installation, we can confidently say that a quiet multizone heat pump is entirely possible in Montréal and surrounding areas. The choice of model, installation quality, and technical adjustments make all the difference.
At AirGreen, we’ve made this promise a reality for dozens of satisfied customers. Why not for you?