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

by J. R. Waters (Coventry University)

• ISBN13: 9781405151870
• ISBN10: 1405151870
• Format: eBook
• Copyright: 2008-04-01
• Publisher: Wiley-Blackwell

Summary

The conservation of fuel and power in buildings is an important part of the UK government's strategy to reduce national energy conservation. The revision to Part L of the Building Regulations, which came into force on 1 April 2002, lays down detailed and extensive requirements for conserving energy in almost all buildings and it covers most potential causes of building energy consumption.This guide explains these detailed requirements and shows how they apply to particular cases, with the use of numerous worked examples. It includes a chapter on air tightness and leakage testing, a topic with which many building professionals are unfamiliar.

Table of Contents

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

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