Voluntary Display Energy Certificates (VolDECs) are a new and innovative voluntary operational energy rating scheme designed for commercial office buildings. They have been developed by a partnership between the National Energy Foundation and Phil Jones of Building Energy Solutions. This not-for-profit scheme has been funded and piloted by Legal & General. VolDECs are based on relatively simple data, making them inexpensive and quick to produce.

Many commercial office buildings do not have an appropriate means of measuring and highlighting energy performance in a relatively simple and consistent way.

In particular, there are issues associated with the landlord and tenant energy split and the lack of relevant benchmarks to enable performance to be measured and compared sensibly and consistently.

The new approach pioneered by VolDECs can separate tenant energy use from that of the landlord, thereby helping to provide property owners and operators with cost-effective, user-friendly energy ratings for areas of a building that are within their control to manage and improve.

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