Tough measures for energy conservation came into force in 2002 under the Building Regulations for England and Wales. Architects; contractors and building operators are now required not only to conserve energy but to be aware of the implications of their actions for carbon emissions.
Unlike previous versions, Part L now covers virtually all buildings and almost all potential causes of building energy consumption, and it includes many new features. This book provides an essential companion to Approved Documents L1 and L2, describing, explaining and expanding on the information they contain. It contains numerous worked examples and extensive tabular material, and includes a chapter on air tightness of buildings a new feature of the regulations and the procedures for air leakage testing, together with a chapter on thermal bridging.
J.R.Waters BSc, MPhil, PhD, MCIBSE, CEng is Honorary Research Fellow at Coventry University, where he was formerly Head of Building Services Engineering. He has specialised throughout his career in the thermal and ventilation performance of buildings, and in the thermal characteristics of building materials. He continues to be a consultant to designers and materials suppliers on environmental aspects of building design.
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Cover design by Garth Stewart
The conservation of fuel and power in dwellings; The legal requirement for the conservation of fuel and power in dwellings; General guidance; Design and construction; Work on existing dwellings;
The conservation of fuel and power in
buildings other than dwellings; The legal requirement; General guidance; Design; Construction; Providing information; Work on existing buildings;
Tables of U–values; Windows, doors and rooflights; Roofs, walls and floors; Thermal conductivity and density of building materials;
The calculation of U–values for walls; Background theory; Example calculations;
The calculation of U–values for ground
floors; Introduction; Solid ground floors; Suspended floors;
calculations for glazing; Introduction; Example calculations;
SAP ratings and the carbon index; SAP; Carbon factor and carbonindex
; Relationship between SAP and CI; Calculation of trade–off examples;
Methods of meeting the lighting standard; Lamp and luminaire efficiency; Lighting controls; Example calculations;
CPR calculations – methods for office buildings; Origins of the CPR method for office buildings; The carbon performance rating for mechanical ventilation; The carbon performance rating for air conditioning and mechanical ventilation; The carbon performance rating and the whole building method; Example calculations;
Solar overheating calculations; Definitions; Sources of data for the parameters; Example calculation;
Air tightness and air leakage testing; The importance of air tightness; The mechanisms of air infiltration; The measurement of air leakage; The air leakage criterion; Air leakage paths; Alternative test methods; References