HVAC AIR DUCT LEAKAGE TEST MANUAL




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Description
SMACNA has published a procedure for leakage testing of so-called medium and high pressure ductwork since January 1965. It appeared in Chapter 10 of the high velocity (later high pressure) construction standards and in Chapter 8 of the Balancing and Adjustment of Air Distribution Systems Manual of 1967 vintage. In the 1970’s energy conservation measures led to a decline in the use of truly high pressure commercial HVAC systems. Now, greater concern with the amount of leakage in systems of less pressure has evolved.

New research in the leakage rates of sealed and unsealed ductwork has disclosed a need for a better method of evaluating duct leakage. European countries introduced an evaluation approach using the surface area of the duct and the pressure in the duct as the basic parameters. SMACNA has concluded that this approach is far superior to the arbitrary assignment of a percentage of fan flow rate as a leakage criteria. The surface area basis highlights the effect of system size and is now the keynote of new SMACNA duct leakage classifications. It is expected that in the future industry will have correlated leakage classes with performance of particular sealant methods used on individual joint systems.

Content:-
FOREWORD
FORMER TASK FORCE MEMBERS AND OTHER CONTRIBUTORS
NOTICE TO USERS OF THIS PUBLlCATION
TABLE OF CONTENTS
SECTION 1: INTRODUCTION
SECTION 2: RESPONSIBILlTIES
SECTION 3: GENERAL PROCEDURES
SECTION 4: LEAKAGE CLASSIFICATION
SECTION 5: TEST APPARATUS
SECTION 6: TEST REPORTS
APPENDIX A
APPENDIX B
APPENDIX C
APPENDlX D
APPENDIX E through H
APPENDlX I
APPENDIX J
APPENDIX K through M
APPENDIX N




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