To ask the Secretary of State for Work and Pensions what (a) voltage optimisers and (b) equivalent technologies are used within buildings occupied by her Department. [324966]

DWP occupies the vast majority of its properties under the terms of a PFI contract with Telereal Trillium. Telereal Trillium, on behalf of the Department, is currently evaluating two suppliers of voltage optimisation equipment to determine suitability for the DWP estate. The installation of voltage optimisation specifically for lighting circuits is also being considered.

With regard to similar technologies, Telereal Trillium has recently completed a national project on behalf of the Department to install over 5,300 energy saving electronic control devices, on small to medium refrigeration machines—domestic refrigerators and air conditioning units.