A refurbishment had been completed on the first and second floors in 2008 and involved the installation of a Hiross/AET Flexible Space system with conditioned air modules (CAM units) to provide heating, cooling and fresh air. The refurbishment in 2016 involved extending the space heating / cooling and ventilation system to the third, fourth and fifth floors. In addition, some of the windows were upgraded with secondary glazing units which met approval from the conservation officer and the lighting was upgraded to LED lamps with occupancy/absence controls.

The material changes to the space heating, lighting and ventilation as well as configuration of the floors required a new EPC to be produced to satisfy Building Regulations Part L2B. The client also asked us to advise on compliance with the Minimum Energy Efficiency Regulations due to be effective from 1 April 2018.

An EPC had been registered for the five floors in 2009 with a rating in band C (65), immediately after the first and second floors had been refurbished. This therefore set expectations for the client that the new EPC rating will be similar.

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