Energy Conservation in Buildings - A Guide to Part L of the Building Regulations

Introduction; Use of guidance; General definitions applicable to L1 and L2; Testing; 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; Compensation calculations for glazing; Introduction; Example calculations; Target U-value examples; 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