Commercial VRF system

As part of modernising the heating and air conditioning systems at the Ibis Grand Place hotel, a major energy renovation project was carried out to replace the ageing variable refrigerant flow (VRF) systems.

The project aimed to improve energy performance, reduce electricity consumption, increase system reliability, ensure occupant comfort and modernise regulation and supervision.

The existing installation was replaced with a new generation of Mitsubishi Electric VRF systems using PUHY / PUHZ / PUHD outdoor units according to the capacities and configurations required.

The system was kept in a two-pipe configuration, particularly suited to hotel operation.

The two-pipe VRF system uses a liquid line and a gas line. The amount of refrigerant is continuously adjusted by the outdoor units according to the actual needs of guest rooms and common areas.

Each indoor unit can modulate its output independently to maintain the desired temperature precisely.

All 69 indoor units were replaced or reconnected depending on their condition and compatibility with the new equipment.

Each room now benefits from more precise temperature control.

The six rooftop VRF groups were removed and replaced with new Mitsubishi units.

The new units deliver better seasonal efficiency while maintaining low noise levels.

The entire refrigerant network was inspected, adapted or replaced as required.

Particular attention was paid to connection quality to ensure long system life.

The installation now benefits from modern control providing:

Technical teams now have better visibility over system operation.

Commissioning was carried out in accordance with manufacturer procedures.

The old system featured older technology, less efficient compressors, degraded seasonal efficiency and high partial-load consumption.

The new Mitsubishi generation generally delivers lower electricity consumption, improved seasonal efficiency, better mid-season capacity recovery and optimised room-by-room operation.

In hotels, where occupancy varies significantly throughout the day and year, gains are particularly noticeable thanks to continuous power modulation.

Depending on the condition and age of the replaced installation, savings on this type of renovation are generally between 20% and 40% of heating and cooling consumption.

Replacing the 6 rooftop VRF systems supplying 69 indoor units at the Ibis Grand Place hotel with a new generation of Mitsubishi Electric two-pipe systems has fully modernised the building's HVAC installation.

Thanks to latest-generation inverter technology, high-performance centralised control and full commissioning including all refrigeration and electrical checks, the hotel now has a more reliable, more economical and more comfortable system for its occupants, while significantly reducing operating costs and energy footprint.