<p>Since 2011-12 DECC's estate has increased in order to accommodate the growth in staff numbers and this has had an effect on gas and electricity spend. However DECC continually aims to increase energy efficiency by taking steps to decrease our energy consumption and reduce our carbon impact.</p><p>Previous work which has contributed to energy efficiency and cost savings has included:</p><p>(1) Installation of a dedicated chiller for our IT systems which enables the main chillers which support the building to be switched off.</p><p>(2) Development and enforcement of a heating and cooling policy.</p><p>(3) Installation of a heat recovery system in the Whitehall Place canteen to keep it warm in winter thereby reducing the need for heating.</p><p>(4) Installation of solar film to reduce solar heat gain, thereby reducing the need for air conditioning in summer.</p><p>(5) Installation of radiator insulation panels in 55 Whitehall, reducing the need for increased heating in the winter.</p><p>Current work on energy efficiency and cost savings includes:</p><p>(1) The adoption of energy management system ISO50001.</p><p>(2) Using the Mayor of London's RE:FIT programme. This scheme is designed to help public sector organisations achieve substantial financial savings, improve the energy performance of their buildings and reduce their CO<Sub>2</Sub>footprint.</p><p>(3) Undertaking a LED lighting trial with the ambition of rolling out energy efficient lighting.</p><p>(4) Allowing opening of windows, where feasible, in Whitehall Place thereby reducing the need for air conditioning.</p>