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AS 4508-1999

Current
Current

The latest, up-to-date edition.

Thermal resistance of insulation for ductwork used in building airconditioning (Reconfirmed 2018)
Available format(s)

Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Published date

05-02-1999

Preview

1 - AS 4508-1999 THERMAL RESISTANCE OF INSULATION FOR DUCTWORK USED IN BUILDING AIRCONDITIONING
4 - PREFACE
6 - CONTENTS
7 - SECTION 1 SCOPE AND GENERAL
7 - 1.1 SCOPE
7 - 1.2 APPLICATION
7 - 1.3 REFERENCED DOCUMENTS
7 - 1.4 DEFINITIONS
8 - 1.5 THERMAL PERFORMANCE
8 - 1.6 THERMAL RESISTANCE
8 - 1.7 CLASSIFICATION
8 - 1.8 EVALUATION
8 - 1.8.1 Thermal analysis
8 - 1.8.2 Economic evaluation
9 - SECTION 2 REQUIREMENTS FOR BULK INSULATION THERMAL RESISTANCE
9 - 2.1 SCOPE OF SECTION
9 - 2.2 INSULATION THERMAL RESISTANCE
9 - 2.3 TEST METHODS
9 - 2.4 CIRCULAR INSULATION
10 - SECTION 3 EQUATIONS
10 - 3.1 SCOPE OF SECTION
10 - 3.2 THERMAL PERFORMANCE
10 - 3.2.1 Insulation thermal resistance (RI)
10 - 3.2.2 Effective composite duct thermal resistance (REFF)
10 - 3.2.3 Radial heat transfer systems
12 - APPENDIX A - THERMAL ANALYSIS OF DUCT INSULATION
12 - A1 SCOPE
12 - A2 ANALYSIS OF BUILDINGS- CASES 1 AND 2
12 - A2.1 Building assumptions
12 - A2.2 System operation assumptions
13 - A2.3 Calculation of Case 1 duct heat losses and gains
15 - A2.4 Calculation of Case 2 duct heat losses and gains
16 - A3 BOUNDARY CONDITIONS
16 - A4 ANALYSIS OF RESULTS
17 - APPENDIX B - ECONOMIC EVALUATION AND RESULTS
17 - B1 SCOPE
17 - B2 METHODOLOGY
17 - B3 CALCULATION OF COSTS AND BENEFITS
17 - B3.1 Residential buildings
17 - B3.2 Commercial buildings
17 - B3.3 Analysis
18 - B4 CONCLUSIONS AND RECOMMENDATIONS
19 - APPENDIX C - COMPARISON OF ROUND AND PLANAR INSULATION
19 - C1 INTRODUCTION
19 - C2 METHODOLOGY
19 - C2.1 General
19 - C2.2 Duct diameters
19 - C2.3 Equations and relationships used
20 - C2.4 Iterative analysis methodology

Specifies requirements relating to the optimum thermal resistance of insulation for rigid and flexible ductwork and associated fittings used in heating, airconditioning and evaporative cooling systems of buildings and dwellings.

This Standard sets out requirements relating to the optimum thermal resistance of insulation for rigid and flexible ductwork and fittings used in heating, ventilating and airconditioning (HVAC) systems of buildings and dwellings.

Committee
ME/77
DocumentType
Standard
ISBN
0 7337 2540 7
Pages
14
ProductNote
Reconfirmed 14/09/2018.
This standard has been reconfirmed in Australia in 2018 and remains current in New Zealand. Reconfirmation Notice 14/09/2018
PublisherName
Standards Australia
Status
Current
Supersedes

First published as AS 4508-1999.
Reconfirmed 2018.
First published as AS 4508-1999. Reissued incorporating Amendment No. 1 (November 2000).

AS 3595-1990 Energy management programs - Guidelines for financial evaluation of a project
AS 2352-1980 Glossary of terms for thermal insulation of buildings
AS 2464.7-1990 Methods of testing thermal insulation Determination of the average thermal resistance of low-density mineral wool thermal insulation - Batt and blanket type
AS 2464.5-1985 Methods of testing thermal insulation Steady-state thermal transmission properties by means of the heat flow meter
AS 2464.6-1983 Methods of testing thermal insulation - Steady-state thermal transmission properties by means of the guarded hot plate
AS 1668.2-1991 The use of mechanical ventilation and air-conditioning in buildings Mechanical ventilation for acceptable indoor-air quality

AS 4254.2-2012 Ductwork for air-handling systems in buildings Rigid duct
AS 4254-2002 Ductwork for air-handling systems in buildings

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