A duct system may contain ducts under positive and negative pressure. Systems should be designed using accepted engineering practice and data such as that in the four ashrae handbooks and the smacna hvac duct systems design manual. Repair leaks and repeat tests until total leakage is less than 1% of system design airflow when the system is pressurized to the design duct pressure class rating. Smacna handbook smacna smacna insulation smacna manual smacna standards smacna third edition smacna 2005 pdf smacna 1981 pdf smacna design smacna oshpod smacna 1520 smacna 2005 3rd edition smacna third edition 2005 smacna round duct smacna duct construction smacna standard 3rd edition. It should be noted though that none of the smacna standards require duct. Offers options methods, materials and construction for solving energy costs and. More available in the ashrae handbook or smacna obtain other duct fittings pressure losses from manufacturers such as duct. Duct construction to conform to the appropriate smacna. The return air duct shall be sized based on peak ahu.
Leakage evaluation for supply duct in figure 81, page 84 of the smacna hvac duct design manual. Design guide for heating, ventilating, and air conditioning systems. Ashrae categorizes duct systems as either single path or dual path. The fourth edition of hvac systems duct design presents the basic methods and procedures required. Smacna third edition 2005 smacna 2005 3rd edition smacna standard 3rd edition. Smacna cad standard second edition v notice to users of this publication 1. Smacna contractors researched the current and future potential use of fiberglass reinforced plastic frp duct as well as its physical properties, to provide contractors, architects, engineers, managers, and plant owners with this authoritative resource that can be relied upon for the proper selection, manufacture, and installation of. Sections include load calculations, duct design, duct construction, insulation, vents, air terminals, control applications, system specifications and other updated industry equipment and methods for residential systems. The results of these certified tests which permit the variation are shown on the back page of this manual. When the designer has only required leakage tests to be conducted in accordance with the smacna hvac air duct leakage test manual for verification that the leakage classifications in table 1 have been met and has given no other criteria and scope, he is deemed to have not fulfilled the responsibilities outlined in section 2. The hvac air duct leakage test manual provides practical and detailed procedures for conducting leakage tests. Dimensional stability shape deformation ashrae handbooks and the smacna hvac duct and strength.
Manual q commercial low pressure low velocity duct system. Smacna architectural sheet metal manual 7th edition. Seismic restraint manual guidelines for mechanical oshpd. With better sealing methods developed, the 2012 edition of the hvac air duct leakage manual, established more stringent lower leakage classes then the 1985 manual. Indicate the required smacna shl tables to be used at the different attachment locations. Scribd is the worlds largest social reading and publishing site. In keeping with its policy of disseminating information and providing standards of design and construction, the sheet metal and air conditioning contractors national association, inc. Duct design manual as part of our continuing effort to upgrade the quality of work produced by the heating, ventilating and air conditioning hvac. Handbook manual guide by sheet metal and air conditioning contractors national association, 2016. Manual digital airah da3 duct design manual manufacturersprograms.
Smacna smacna third edition smacna handbook smacna 1981 pdf smacna insulation smacna manual smacna 2005 pdf smacna design smacna standards smacna 2005 3rd edition smacna third edition 2005 smacna duct construction smacna round duct smacna testing adjusting balancing smacna standard 3rd edition. Calculate the values of c s at the various attachment locations in the building 3. Download hvac duct construction tables according to smacna and rule of thumbs pdf. Disclaimer of warranties a the sheet metal and air conditioning contractors national association smacna. Ansismacna 0062006 hvac duct construction standards.
Thirty of smacna s most requested technical manuals are conveniently located in pdf format with searchable indexes on one cdrom. Air leakage in ductwork rev 02 linx industries, inc. Rectangular industrial duct construction standards metric. Smacna recently stated in the forward of the 2nd edition hvac air duct leakage manual 2012, smacna encourages designers to specify equipment air leakage control and to rely on prescriptive sealing ductwork as measures that will normally lead to effective control of air leakage without the need for. Air flow problems have plagued the hvac industry for years. Manual q commercial low pressure low velocity duct system design. Smacna hvac systems duct design manual, fourth edition december 2006, table a. Book by sheet metal and air conditioning contractors national association, 2006.
Revised design manual for commercial and light industrial hvac systems. The colebrook equation value of f must be solved for iteratively. Free ductwork tables for sizing and construction of hvac air ducts. Further considerations duct sizing methods there is no single duct sizing method that will inherently give the best duct design. The manual incorporates the current technology available for contractors and designers to provide a stateoftheart system. Also, in locations of high seismicity, the smacna srm details. Manual q commercial low pressure low velocity duct system design hank rutkowski, rutkowski, hank on. Shl f pw pwhich c s shl is the ratio of the seismic force to the items weight.
This manual provides the hvac system designer detailed information on duct design. Smacna duct construction free download as pdf file. Duct sizing and construction tables according to smacna pdf. Smacna seismic restraint manual mark terzigni project manager smacna technical resources 0d\ history. Smacna hvac air duct leakagg,e test manual, first edition, 1985. Principle of duct design in hvac systems cedengineering. Advice to consult the smacna hcva air duct leakage test manual was entered. Further considerations duct sizing methods there is no single duct. As an ansiaccredited standards developing organization, smacna standards and manuals address all facets of the sheet metal industry, from duct.
However, if satisfactory duct system performance is to be achieved, it is important for the system. This 2017 va hvac design manual for the department of veterans affairs va healthcare facilities is the only detailed design requirements manual for va. Lowvelocity design will lead to larger duct sizes, but it may be worth since, doubling of duct. As an ansiaccredited standards developing organization, smacna standards and manuals address all facets of the sheet metal industry, from duct construction and installation to air pollution control, energy recovery and roofing. It references both smacna manuals, hvac systems duct design and hvac duct construction. The table below can be used to compare equivalent diameters for rectangular and round circular ducts, ductwork sizing, friction loss, sheet metal gauges, etc. The ashrae fundamentals handbook chapter on duct design and the. Residential comfort system installation standards manual. Metals can be alloyed and formed to create unique metals and shapes to design unique buildings. In order to read a secure pdf, you will need to install the fileopen plugin on your computer. Smacna 0072016 residential comfort system installation standards manual. Smacna technical manuals pmsmca plumbing mechanical sheet. The fourth edition of hvac systems duct design presents the basic methods and procedures required to design hvac air distribution systems. Smacna manual smacna sheet metal manual smacna architectural sheet metal manual smacna architectural sheet metal manual 7th edition smacna smacna design smacna handbook smacna third edition smacna oshpod smacna standards smacna insulation smacna 2005 pdf smacna 1520 smacna 1981 pdf smacna round duct smacna duct construction smacna.
Description thirty of smacnas most requested technical manuals are conveniently located in pdf format with searchable indexes on one cdrom. This manual presents the basic the smacna hvac systemsduct design man methods and procedures needed to design hvac air ual was written to be. Lowvelocity ductwork design is very important for energy efficiency in air distribution systems. A comprehensive duct layout indicating sizes, design airflows, pressure class, and routing of the duct. Also, both options have been shown, so as to provide this manual as a quick reference to smacna standards. Available in pdf or cd only 1st edition, 2009, 146 pages. Highvelocity hv duct systems are characterized by air velocities in the range of 2500 to 3500 fpm.
Disclaimer of warranties a the sheet metal and air conditioning contractors national association smacna provides its product for informational. Also, both options have been shown, so as to provide this manual as a quick reference to smacna. End of standard design and construction standards, revised november 2007 5. It should be noted though that none of the smacna standards require duct air leakage testing by default. Ansi smacna 0062006 hvac duct construction standards eli p. This has included active participation in technical and standards committees for professional organizations that serve the hvac industry, such as ashrae, astm, amca, and smacna. A number of duct fittings are used to illustrate airflow movement variations through a duct system. Smacna manual smacna sheet metal manual smacna architectural sheet metal manual smacna architectural sheet metal manual 7th edition smacna smacna design smacna handbook smacna third edition smacna oshpod smacna standards smacna insulation smacna 2005 pdf smacna 1520 smacna 1981 pdf smacna round duct smacna duct construction smacna 2005 3rd edition. This manual provides the hvac system designer detailed information on duct design and u. Identify code requirements regarding sizing, design, and selection of hvac equipment and ducts explain how the acca manual j, s and d load calculation standards are used to determine appropriate sizing and design of ducts and hvac equipment describe the role the hvac system plays in moisture control and the effect. Smacna, offers this comprehensive fundamental hvac systems. Howard, iii sheet metal and air conditioning contractors national association. Smacna is the sheet metal and air conditioning contractors national association. Calculate c s from the information in the applicable local building code 2.
1412 135 646 1302 595 1243 42 1303 13 968 817 1456 1224 1633 686 110 365 594 1081 879 362 1279 233 1017 633 505 811 261 1626 1173 674 163 590 128 1238 1265 128 908 439 1016