Installation of a Fujitsu MultiZone system in Rosemont–La Petite-Patrie

A careful installation for tailor-made comfort in a Montreal triplex

At AirGreen , we are regularly called upon for complex HVAC installation projects in typical Montreal residential buildings. This time, our team traveled to the Rosemont–La Petite-Patrie neighborhood to install a Fujitsu MultiZone system , perfectly suited to a recently renovated triplex.

Project background

The owner wanted to modernize the thermal comfort of the three dwellings while minimizing energy consumption.
His goals were clear:

• Provide independent temperature control on each floor.

• Reduce exterior and interior noise.

• Optimize space by avoiding bulky ducts.

Our solution: a highly energy-efficient Fujitsu MultiZone system , consisting of three indoor wall units connected to a single outdoor compressor.

Site survey and preparation

Before any installation, we carried out a complete analysis of the building configuration :

• Checking load-bearing walls and brick structure.

• Evaluation of the distance between the indoor units and the outdoor compressor.

• Selecting the optimal route for passing copper pipes and electrical wiring .

This preliminary phase ensured an installation that was both aesthetic and durable , complying with municipal standards and the guidelines of the manufacturer Fujitsu.

Installing the Fujitsu MultiZone System

The installation took place in three main stages:

1. Fixing the external supports

The compressors were mounted on galvanized wall brackets , carefully anchored into the building's masonry.
Each unit is positioned to ensure good air circulation and easy access for maintenance . The refrigerant pipes have been grouped together in a white technical duct , ensuring both protection and a clean finish, in harmony with the facade.

2. Installation of indoor units

Inside each home, our technicians installed a strategically positioned Fujitsu wall unit :

• Main living room on the ground floor.

• Second floor master bedroom.

• Open area on the third floor.

Each unit has been individually tested to ensure a perfect balance between airflow, noise level and set temperature.

3. Refrigeration connections and calibration

Once the copper pipes and communication cables were secured, our team proceeded to:

• A complete vacuum of the circuit to eliminate all moisture.

• A nitrogen leak test under pressure.

• Injection of R410A refrigerant according to the exact charge recommended by Fujitsu.

• A final calibration via the electronic parameters of the compressor main board.

Result: personalized comfort and energy efficiency

From the moment it was switched on, each tenant was able to feel the immediate comfort of the system:

• A stable and uniform temperature in all rooms.

• Near-silent operation , even in high-performance mode.

• 30% lower energy consumption compared to their old window system.

The owner particularly appreciated the careful finishing of the wiring and exterior pipes, perfectly aligned and protected.

Why choose a Fujitsu MultiZone system?

The Fujitsu MultiZone is ideal for multi-story buildings and multi-unit residences:

• It allows multiple zones to be controlled from a single compressor.

• It significantly reduces the number of exterior units visible on the facade.

• It offers unparalleled configuration flexibility (up to 5 indoor units).

• Its high energy efficiency makes it a sustainable energy-efficient solution, perfectly adapted to the Quebec climate.

AirGreen expertise in Montreal

At AirGreen , every installation is carefully planned and executed to the highest standards in the HVAC industry.
Our Fujitsu certified technicians provide:

• Compliance with electrical and refrigeration safety standards .

• Discreet and aesthetic integration of the pipes.

• A complete after-sales service , including seasonal maintenance and manufacturer's warranty.

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AirGreen is the assurance of a durable, quiet and efficient HVAC installation .
Whether it's for a Fujitsu MultiZone system , a Gree wall-mounted air conditioner , a Midea heat pump or a Trane central solution , we operate throughout Greater Montreal , in Laval , on the North Shore and the South Shore , to offer the best in modern comfort.