Conservation of fuel and power: Approved Document L, Volume 1 — Dwellings

O N L I N E V E R S I O N AA For each system, commissioning includes all of the Dwelling fabric energy efficiency rate Expressed as following. kWh/(m2·year) and determined using the Standard Assessment Procedure. • Setting to work. Dwelling primary energy rate Expressed as kWh / • Regulation (that is, testing and adjusting PE (m2·year) and determined using the Standard repetitively) to achieve the specified Assessment Procedure. performance. Economically feasible The capital cost of a • Calibration. measure will be recouped in energy savings within a • Setting up and testing the associated automatic reasonable time. For the purposes of this document, control systems. economically feasible means that the measure • Recording the system settings and the would achieve a simple payback after one of the performance test results that have been following. accepted as satisfactory. • 7 years, for the installation of thermostatic Community heating system A system that supplies room controls. heat from a central source to more than one • 15 years, for any other measure. dwelling or premises within a single building. Emergency escape lighting The emergency lighting Consequential improvements Those energy that illuminates an area for the safety of people efficiency improvements required by regulation 28. leaving that area or for people attempting to stop a *Controlled service or fitting Defined in regulation dangerous process before leaving that area. 2(1) as a service or fitting in relation to which *Energy efficiency requirements Defined in Part G [sanitation, hot water safety and water regulation 2(1) as the requirements of regulations 23, efficiency], H [drainage and waste disposal], J 25A, 25B, 26, 26A, 26C, 28, 40 and 43 and Part L of [combustion appliances and fuel storage systems], Schedule 1. L [conservation of fuel and power] or P [electrical Energy performance certificate Defined in the safety] of Schedule 1 imposes a requirement. Energy Performance of Buildings (England and Cooling load The rate at which heat is removed Wales) Regulations 2012 as a certificate which: from the space to maintain a desired air a. in the case of a certificate entered on the temperature. register before 9th January 2013 complied District heat networks Supply heat from a central with the requirements of regulation 11(1) of the source to consumers, via a network of underground Energy Performance of Buildings (Certificates pipes carrying hot water. Heat networks can cover a and Inspections) (England and Wales) large area or even an entire city, or can be relatively Regulations 2007; local, supplying a small cluster of buildings. b. in the case of a certificate entered on the Dwelling A self-contained unit designed to register on or after 9th January 2013 complies accommodate a single household. with the requirements of regulation 9(1) of these Regulations; or NOTE: Buildings exclusively containing rooms for residential purposes, such as nursing homes, c. complies with the requirements of regulation student accommodation and similar, are not 29 of the Building Regulations 2010. dwellings. In such cases, Approved Document L, Volume 2: Buildings other than dwellings applies. Dwelling emission rate The dwelling CO emission 2 rate expressed as kgCO /(m2·year) and determined 2 using the Standard Assessment Procedure. BBuuiillddiinngg RReegguullaattiioonnss 22001100 AApppprroovveedd DDooccuummeenntt LL VVoolluummee 11,, 22002211 eeddiittiioonn 7733 O N L I N E V E R S I O N