Mitsubishi Mr. Slim Range — Commercial Classic

The Mitsubishi Electric Mr. Slim series is one of the longest-established and most trusted commercial HVAC ranges in the world.
It is engineered for reliability, flexibility, and energy efficiency — essential qualities for UK businesses requiring consistent performance in offices, shops, or industrial premises.

System Overview

Mr. Slim systems are available in split and multi-split configurations, with outdoor units ranging from 3.5 kW to 14 kW.
They can connect to multiple indoor unit styles — wall, ceiling, ducted, and cassette — providing flexible climate solutions for open or partitioned spaces.

Energy Performance

Equipped with DC inverter scroll compressors, Mr. Slim achieves up to A++ energy ratings and seasonal efficiency ratios of SEER 7.5 and SCOP 4.6 (EN14825).
Compared with older non-inverter systems, power consumption can be reduced by 35–40 %, which translates into lower energy bills and reduced environmental impact.

Reliability and Construction

The outdoor units are built with Blue Fin anti-corrosion coating and heavy-gauge steel frames, tested for 1 000-hour salt spray resistance.
Copper piping, enlarged heat exchangers, and advanced oil-return systems ensure long-term reliability, especially in high-load environments.

Quiet and Comfortable Operation

The series is known for low sound levels:

• Indoor unit: 26–34 dB(A)

• Outdoor unit: 46–51 dB(A)

This makes Mr. Slim suitable even for customer-facing areas such as retail stores or reception zones.

Smart Control Options

Mr. Slim integrates with MELCloud, Mitsubishi’s Wi-Fi control platform, as well as PAR-WT50R-E wired controllers.
Building managers can schedule operation, monitor temperature trends, and review energy consumption remotely.
Compatibility with BMS protocols (BACnet, Modbus, LonWorks) allows integration into smart-building systems.

Installation Flexibility

Pipe runs can extend up to 75 m total with 30 m height difference, simplifying installation in multi-storey offices.
Refrigerant charge adjustment and auto-test modes speed up commissioning.

Example Application

A three-storey office in Birmingham using four Mr. Slim PUHZ-ZRP71VHA2 outdoor units achieved a 42 % reduction in electricity use and improved comfort consistency after upgrading from fixed-speed systems.

Conclusion

The Mitsubishi Electric Mr. Slim range continues to set the commercial standard for efficiency and reliability.

Its inverter technology, smart control, and proven durability make it an excellent investment for offices, shops, and commercial facilities seeking dependable year-round comfort.