Mitsubishi City Multi VRF for Large Buildings

The Mitsubishi Electric City Multi series represents one of the most sophisticated and energy-efficient VRF systems available for large commercial properties.

Designed for offices, hotels, hospitals, and multi-storey buildings, City Multi systems deliver high capacity, exceptional flexibility, and intelligent energy management.

Scalable Capacity

The City Multi R2 and YNW series offer outdoor unit capacities from 8 HP to 60 HP, with modular configurations up to 150 HP.
One VRF network can connect to up to 50 indoor units, allowing independent temperature control across multiple floors or departments.
Refrigerant piping runs up to 1 000 m total length and 90 m height difference, making the system ideal for tall buildings and complex layouts.

Energy Efficiency and Heat Recovery

Mitsubishi’s two-pipe heat recovery system (R2 series) simultaneously provides heating and cooling in different zones using only two refrigerant lines.
This patented design reduces copper usage, simplifies installation, and achieves up to 30 % lower energy consumption compared with traditional three-pipe systems.
Typical performance ratings:

• SEER: 8.4

• SCOP: 5.1

• Energy class: A+++

Inverter Compressor Technology

Twin DC scroll compressors with variable frequency drive (VFD) continuously modulate speed between 10 % and 100 %, matching load precisely.
This ensures smooth operation, no temperature swings, and reduced power peaks.

Noise and Reliability

Outdoor sound levels are as low as 50 dB(A) in standard mode and 44 dB(A) in Silent Mode.
Indoor units range from 23 – 30 dB(A), ensuring quiet performance suitable for premium offices and hotels.
Advanced oil management and automatic refrigerant charge balancing extend compressor life beyond 20 years.

Controls and Integration

City Multi integrates with MELCloud, PAR-WT50R-E wired controllers, and building management protocols (BACnet, Modbus, LonWorks).
Centralised control via AE-200E BMS interface enables scheduling, fault monitoring, and remote adjustment from a PC or mobile device.

Environmental Responsibility

The system complies with EU EcoDesign standards and uses R410A refrigerant, with next-generation R32 models under development for reduced GWP.
All components undergo a 1 000-hour corrosion test to ensure long-term reliability in demanding environments.

Case Study

A 12-storey office in Birmingham replaced its chiller-fan coil system with City Multi R2 VRF, achieving 39 % energy savings and improved comfort across 5 000 m².

Conclusion

Mitsubishi City Multi VRF offers powerful, scalable, and intelligent HVAC for large buildings.
With heat recovery, quiet operation, and precise control, it provides long-term efficiency and comfort for commercial projects across the UK.