VRF performance seals square deal


27 August 2019
The regeneration scheme in the heart of Leicester city centre
Toshiba VRF air conditioning is delivering high-efficiency cooling and heating for part of a £50million regeneration scheme in Leicester.

The development, being built by Morgan Sindall Construction, includes two new hotels, premium commercial offices and a new public area – Great Central Square – in Leicester city centre.

No.1 Great Central Square comprises 35,000 square feet of open-plan office space over five floors, air conditioned by a high performance, heat-pump-based Toshiba SMMS-e system, installed by Ambivent.
Toshiba SMMS-e VRF outdoor units
Ten Toshiba outdoor units supply cooling and heating via 40 indoor cassettes installed across the building, with a heat recovery ventilation system in each wing further boosting efficiency and reducing end user running costs. A 12kW Toshiba split system running on R-32 refrigerant installed in the reception area completes the total building system. High level control and monitoring is provided by a Black Pear system.

“The project was originally specified with ducted equipment from another manufacturer, however this was outside the budget,” said Joshua Medhurst, who carried out the mechanical services design under the supervision of Ambivent’s design manager Steve Thornton. “We proposed an alternative system using Toshiba’s SMMS-e two-pipe VRF with cassettes, as it met the requirements for high quality, reliability and delivery of both heating and cooling with excellent energy efficiency. It won the day.

“We received outstanding support from Toshiba sales manager James Selfridge throughout the detailed design and after-sales stages.”

Toshiba’s SMMSe system has European Seasonal Energy Efficiency Rating (ESEER) values of over seven for all units in the range. It also claims excellent resilience, with two inverter-controlled Toshiba twin-rotary compressors in each outdoor unit, providing back-up in the unlikely event of a failure.

For the contractor, the system is equipped with a wireless wave-tool, which simplifies commissioning, servicing and system monitoring with Android smartphones.

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