Comparing Multizone Heat Pumps in Montréal: Performance, Reliability, and AirGreen's Expertise at Your Service
In an urban setting like Montréal, Laval, or Longueuil, where extreme weather conditions require precise heating and cooling solutions, choosing a multizone heat pump cannot be left to chance. At AirGreen, we understand that every building—whether residential, commercial, or multi-unit—has its own specific needs. That’s why we’ve put the three most popular brands to the test: Bosch, Fujitsu, and LG, to determine which one stands out as the best choice based on your specific needs.
Understanding the Concept of a Multizone Heat Pump
Before diving into the comparison, let’s clarify what a multizone heat pump is. This HVAC system allows you to connect multiple indoor units to a single outdoor unit, offering personalized comfort room by room. It’s the perfect solution for multi-story homes, duplexes, or office spaces in Montréal and the North Shore or South Shore.
Bosch BOVA Multizone: German Technology and Energy Efficiency
Bosch’s BOVA Multizone system with R-454B refrigerant stands out for its industrial reliability and its strong heating performance, even during harsh Quebec winters.
Advantages:
-
High energy efficiency (up to 20 SEER / 10.5 HSPF).
-
Compatible with the new R-454B refrigerant, which is more environmentally friendly.
-
Extremely quiet operation (sound levels as low as 56 dB for the outdoor unit).
-
Ideal for high-end residential or commercial projects.
In Practice with AirGreen:
In a recent project in Boisbriand, we installed a Bosch BOVA system for a triplex. The challenge was to heat the three units evenly without multiplying outdoor units. Thanks to its smart modulation capability, the Bosch system adapted to the varying needs of each indoor unit. The result: a 34% reduction in energy consumption compared to their old forced air system.
Fujitsu Airstage KX: Proven Reliability for Extreme Climates
The Fujitsu Airstage KX multizone system is known for its longevity and consistent performance in extreme cold, down to -26°C. It is often recommended for older homes in Laval, where buildings require more robust solutions.
Key Features:
-
Inverter compressor technology for outstanding performance.
-
Compatible with up to 8 zones connected to a single outdoor unit.
-
Uses R-32 refrigerant for a smaller environmental footprint.
-
A great choice for historic buildings and century-old homes.
A Typical Installation Case:
In a historic home in Vieux-Longueuil, our team replaced an old oil heating system with a Fujitsu Airstage multizone heat pump. Thanks to its discreet integration and compact indoor units, we were able to preserve the property’s historic aesthetic while improving energy efficiency. The homeowner also qualified for a $2,480 subsidy through Hydro-Québec’s LogisVert program.
LG Multi F MAX: Intelligent Performance and Discreet Design
The LG Multi F MAX multizone heat pump stands out for its multiple design options for indoor units (wall-mounted, cassette, ducted, ceiling-mounted). It has become a popular system choice for modern condos in Griffintown or Brossard.
Advantages:
-
Compatible with up to 9 zones.
-
Standard Wi-Fi control via the LG ThinQ app.
-
Excellent performance-to-price ratio.
-
R-410A refrigerant (soon to be available in R-32 for newer models).
Installation Example:
In a penthouse located in Ville-Marie, we opted for an LG Multi F MAX system with ceiling cassettes to free up wall space. The installation was particularly challenging due to the concrete ceilings, but our installers were able to discreetly route the piping, ensuring compliance with stringent anti-vibration standards. The result was high-end comfort with no compromise on aesthetics.
Overall Comparison of the Three Multizone Brands
| Criterion | Bosch BOVA | Fujitsu Airstage KX | LG Multi F MAX |
|---|---|---|---|
| Refrigerant | R-454B | R-32 | R-410A |
| HSPF Efficiency | Up to 10.5 | Up to 11.5 | Up to 10 |
| Max Zones | 5 | 8 | 9 |
| Heating Performance | Excellent | Excellent (down to -26°C) | Very good |
| Outdoor Noise Level | Very quiet | Moderate | Quiet |
| Eligible for Subsidies | Yes | Yes | Yes |
| Maintenance Ease | Easy | Moderate | Very easy |
| Design Integration | Good | Moderate | Excellent |
AirGreen's Verdict: Which Multizone Heat Pump Should You Choose?
The best choice always depends on your specific project. Here are our general recommendations:
-
For demanding residential clients in Laval or the North Shore, Bosch stands out for its quiet reliability.
-
For older properties in Montréal or Longueuil, Fujitsu is the logical choice for its performance in extreme cold.
-
For modern projects, condos, or offices with high aesthetic requirements, LG impresses with its design and connectivity.
Why Choose AirGreen for Your Multizone Project?
We’re not just installers. At AirGreen, we are HVAC engineering specialists with hundreds of successful installations in Montréal, Laval, South Shore, and North Shore. Our team considers your specific needs, the building's architecture, existing insulation, and eligibility for government subsidies to recommend the best multizone system.
We manage the entire process: from thermal analysis to installation, to final commissioning, all with custom solutions and flawless finishing. You also benefit from our comprehensive after-sales service, including annual maintenance options and extended warranties.
Practical Tips for a Successful Multizone Project
-
Avoid undersizing your outdoor unit: a multizone system should be sized based on the total number of connected zones.
-
Opt for indoor units with a quiet mode if the rooms served are bedrooms.
-
Check accessibility for maintenance (especially for ducted or ceiling cassette units).
-
Request your free assessment at AirGreen to learn about the best combinations based on your needs and subsidy eligibility.