Conservation of fuel and power: Approved Document L, Volume 2 — Buildings other than dwellings

AA O N L I N E V E R S I O N • Building work involves changes to the façade a. in the case of a certificate entered on the and glazing that require planning consent, and register before 9th January 2013 complied planning requirements mean that a greater with the requirements of regulation 11(1) of the height of glazing is necessary, e.g. to fit with Energy Performance of Buildings (Certificates surrounding buildings or to match the character and Inspections) (England and Wales) of the existing façade. Regulations 2007; District heat networks Supply heat from a b. in the case of a certificate entered on the central source to consumers, via a network of register on or after 9th January 2013 complies underground pipes carrying hot water. Heat with the requirements of regulation 9(1) of networks can cover a large area or even an entire these Regulations; or city, or can be relatively local, supplying a small c. complies with the requirements of regulation cluster of buildings. 29 of the Building Regulations 2010. Dwelling A self-contained unit designed to Envelope area (the measured part of the building) accommodate a single household, including a The total area of all floors, walls and ceilings dwellinghouse and a flat. bordering the internal volume that is the subject Economically feasible The capital cost of a of a pressure test. This includes walls and floors measure will be recouped in energy savings below external ground level. Overall internal within a reasonable time. For the purposes of this dimensions are used to calculate this envelope document, economically feasible means that the area, and no subtractions are made for the area of measure would achieve a simple payback after one the junctions of internal walls, floors and ceilings of the following. with exterior walls, floors and ceilings. • 7 years, for the installation of thermostatic Existing district heat network A district heat controls. network that is either in operation or is under construction on 15 June 2022. For these purposes, • 7 years, for the extension of on-site low and under construction means any of the following. zero carbon energy-generating systems which are required as consequential improvements (see • The building to house the energy centre has Appendix D, Table D1). been constructed. • 15 years, for any other measure. • There is a heat offtake agreement signed between the heat network and a third party. Emergency escape lighting The emergency lighting that illuminates an area for the safety of people • Excavation for pipework has been completed. leaving that area or for people attempting to stop Fit-out work The work to complete the a dangerous process before leaving that area. partitioning and building services within the Energy efficiency ratio (EER) In chillers, this is external fabric of the building (the shell) to meet calculated by dividing the cooling energy delivered the specific needs of incoming occupiers. Fit-out into the cooling system by the energy input to the work can be carried out either: chiller. • during the same project and time frame as the *Energy efficiency requirements Defined in construction of the building shell regulation 2(1) as the requirements of regulations • at a later date, after the shell has been completed. 23, 25A, 25B, 26, 26A, 26C, 28, 40 and 43 and Part L of Schedule 1. *Fixed building services Defined in regulation 2(1) as any part of, or any controls associated with: Energy performance certificate Defined in the Energy Performance of Buildings (England and a. fixed internal or external lighting systems (but Wales) Regulation 2012 as a certificate which: not including emergency escape lighting or specialist process lighting); b. fixed systems for heating, hot water, air conditioning or mechanical ventilation; or 8866 AApppprroovveedd DDooccuummeenntt LL VVoolluummee 22,, 22002211 eeddiittiioonn BBuuiillddiinngg RReegguullaattiioonnss 22001100 O N L I N E V E R S I O N