45. Conservation of fuel and power.

Where there is a change to a building's energy status1, such work, if any, must be carried out as is necessary to ensure that the building complies with the applicable requirements of the building regulations which relate to the conservation of fuel and power2.

Where the renovation of an individual thermal element3constitutes a major renovation or amounts to the renovation of more than 50% of the element's surface area, such work must be carried out as is necessary to ensure that the whole thermal element complies with the requirement to limit heat gains and losses in so far as that