The 165m tall Broadgate Tower skyscraper is being built in conjunction with it's neighbour - the 63m high 201 Bishopsgate - and the two buildings will be connected by a glass canopy.

When completed, the 35-storey Broadgate Tower will be the seventh highest building in London and the third tallest in the City. Along with the adjoining 201 Bishopsgate, it will contain more than 78,968 sqm.

Within the fan coil system, energy saving was of paramount importance and investigations into power consumption for EC variable speed motors would have to be undertaken.

The fan coil units incorporate EC motors which have the advantage of infinitely variable speed. These variable air volume fan coil units (VAV/FCU) can provide significant energy savings compared to the standard constant speed units which have been around for the last 40 years. For example if the air volume was reduced to, say 80% of maximum (i.e. a 20% reduction in air volume) the electrical power consumed by the motor would be halved. If the air volume was reduced to, say, 60% of maximum the electrical power consumption would be reduced to less than a quarter.

Where there is a variable air volume fan coil as opposed to a fixed volume, the grilles and diffuser selection also has to be taken into account so that the grilles will still perform their distribution function even when the air is turned down.

TROX conducted energy efficiency testing and a full control mock up test on site with extensive test reports to the design team.