The Most Surprising Innovations in Multi-Zone Heat Pumps for 2025 in Montréal

Technological breakthroughs transforming residential and commercial HVAC multi-zone systems

In 2025, the multi-zone heat pump market is undergoing a true technological revolution. At AirGreen, we’ve closely observed the rise of new smart features, more eco-friendly refrigerants, and energy performance levels never before achieved. Whether you're a homeowner in Montréal, a property manager in Laval, or a renovation contractor on the South Shore, these innovations are transforming how we approach thermal comfort while meeting the strictest environmental standards.

A necessary evolution in the face of climate and energy challenges

Quebec faces harsher winters and hotter summers. To respond, multi-zone heat pump manufacturers have doubled their efforts to develop systems that are more efficient, more durable, and more flexible. AirGreen has quickly adapted to these changes by integrating these innovations into our multi-zone HVAC installations throughout the Greater Montréal region.

A closer look at the 5 major innovations in multi-zone heat pumps in 2025

1. The rise of the R-454B refrigerant: performance and sustainability

More and more brands—like Bosch, Gree, and Fujitsu—are adopting the R-454B refrigerant, gradually replacing R-410A. This new refrigerant significantly reduces environmental impact, with a Global Warming Potential (GWP) up to 78% lower, while maintaining optimal energy efficiency even at -25°C.

At AirGreen, we recently installed a Bosch multi-zone system using R-454B in a triplex in Petite-Patrie, Montréal. The result: a 20% drop in energy consumption and a more stable system during winter.

2. Ultra-precise modulation inverter compressors

The new ultra-fine modulation inverter compressors now allow continuous power adjustments, ranging from 5% to 100% depending on the needs of each zone. This enables better temperature control in every room, with no sudden fluctuations.

In Laval, a family contacted us to replace an outdated, inefficient bi-zone system. We installed a Gree Multi+ Extreme model, equipped with a variable-speed inverter compressor. The outcome: optimal comfort in every room, even during deep cold spells.

3. Smart connectivity powered by embedded artificial intelligence

In 2025, multi-zone heat pumps are fully connected smart devices. Thanks to embedded AI algorithms, the systems learn user habits and automatically adjust settings to optimize consumption.

Our clients in Longueuil benefit from a Fujitsu KZ Multi-Zone R-32 system connected to their home automation hub. The system learns the habits of each resident and adjusts the temperature in each corresponding zone, reducing electricity bills by up to 25%.

4. Simplified integration thanks to ultra-compact indoor units

The new wall-mounted or floor console indoor units now offer reduced depth and enhanced aesthetic discretion. This makes integration into tight spaces easier while maintaining strong airflow performance.

We carried out an installation in a high-end condo in Brossard, where wall space was limited. Thanks to the slim indoor units from Mitsubishi Multi-Zone SLZ Series, installation was done without any structural modifications—an immense advantage for compact urban spaces.

5. Hybrid air-to-water multi-zone systems

A still little-known but promising innovation is the integration of air-to-water modules into multi-zone heat pumps. Some models can now heat not only the air but also domestic hot water or radiant floor systems.

On the North Shore, we recently installed a Daikin Altherma Multi-Zone system with air-to-water capability in a multi-generational home. The result: a single system ensures thermal comfort across six zones and also powers the basement radiant floor heating.

Why choose a multi-zone heat pump in 2025?

The advantages are many:

• Custom zoning: every room or floor can have its ideal temperature.

• Lower energy costs: up to 30% savings compared to a traditional central system.

• Flexible installation: ideal for renovations or multi-unit buildings.

• Grant eligibility: several models installed by AirGreen are eligible for Hydro-Québec’s LogisVert grant: $120 per 1,000 BTU/h at -8 °C for an ENERGY STAR cold-climate model, calculated on the capacity of the whole multi-zone system.

2025 Grants: more generous financial support

Since November 26, 2025, LogisVert has been based on ENERGY STAR certification: a multi-zone installation can get $120 per 1,000 BTU/h at -8 °C for an ENERGY STAR cold-climate heat pump, calculated on the whole system (not per indoor head), if the installation is done by an RBQ-licensed company such as AirGreen.

For instance, a client in Saint-Bruno-de-Montarville received $5,112 in grants for a tri-zone (3 indoor units) installation using a Gree Multi-Zone Sapphire system.

Mistakes to avoid when choosing your multi-zone heat pump

Even with top-tier technologies, some mistakes can compromise system performance:

• Incorrectly sizing indoor units: poor BTU capacity will affect the overall performance.

• Ignoring the building layout: every project is unique, and only an on-site evaluation can determine the right system.

• Hiring uncertified installers: this may void the manufacturer warranty and government grants.

At AirGreen, we always conduct a complete thermal evaluation of the property and verify the system’s eligibility for grant programs.

Our expertise serving homeowners and building managers

With hundreds of successful multi-zone HVAC installations across Montréal, Laval, Longueuil, the North Shore, and the South Shore, AirGreen has established itself as a leading player in the installation and maintenance of multi-zone heat pumps. Our team is trained on the latest technologies, and we work exclusively with trusted, certified, high-performance brands.

Multi-zone installation in Montréal: a case study

A notable example: in February 2025, we completed a Fujitsu KZ R-32 multi-zone installation in a duplex in Outremont. The challenge? Replacing an old forced-air system without altering interior walls. Thanks to short duct runs and compact wall units, we provided heating and cooling to the six main rooms without invasive work.

The client noted:

• An immediate improvement in thermal comfort in every room.

• A 28% reduction in their Hydro-Québec bill.

• Easy control access through a mobile app.

Maintenance, reliability, and longevity

The 2025 models require regular but simplified maintenance: filter cleaning, pressure checks, and an annual inspection. AirGreen offers custom maintenance contracts to ensure your system’s long life and consistent performance.

Conclusion

The year 2025 marks a new era for multi-zone heat pumps. Thanks to cutting-edge technology, unmatched efficiency, and flexible integration options, these systems are becoming the new standard for anyone seeking efficiency, personalized comfort, and energy savings. At AirGreen, we’re proud to support you in this transition with tailored solutions, expert guidance, and a professional edge recognized throughout Montréal, Laval, Longueuil, the North Shore, and the South Shore.