At systemair, we spend over 450,000 design hours every year developing new and improved. Clicking on a companys name will take you to their web site. No part of this work may be reproduced or used in any form or by any means graphic, electronic, or mechanical, including photocopying. This manual provides the hvac system designer detailed information on duct design and u. The length of duct used for design purposes that includes the. A comprehensive duct layout indicating sizes, design airflows, pressure class, and routing of the duct system. Related commercial resources ashrae handbook fundamentals chapter. Hvac systems design handbook pdf free download epdf. Leaktight laser welded seams, instead of lockform or spiral duct which badly leaks and allows debris harbors and snag opportunities. Rules of duct design acca manual d residential duct systems. Lowvelocity design will lead to larger duct sizes, but it may be worth since, doubling of duct diameter. Highvelocity hv duct systems are characterized by air velocities in the range of 2500 to 3500 fpm. The base sheet should be prepared chapter 11 as soon as the architects floor plan is received.
Design guide for heating, ventilating, and air conditioning systems. The types of fittings to be used based on the designers calculations of fitting losses i. The fundamentals of duct system design mcgill airflow. No matter how much money you spend on a highquality hvac system, the equipment wont work at it s best without properly designed and installed ductwork. Compare installed hvac and duct systems to outputs of manual j, s, and d to verify proper sizing and design. Duct design clicking on a companys name will take you to their web site. Air handling design guide air handling systems dust. Ashrae handbook hvac systems and equipment provides the following. The fourth edition of hvac systems duct design presents the basic methods and procedures required. Decisions are made about the types of systems to be used, building zoning, equipment locations, and routing of ductwork.
Acca manual tair distribution basics for residential and. Consequently, the total pressure or total energy of air flowing in a duct system is generally equal to the sum of the static pressure and the velocity pressure. Ansismacna 0062006 hvac duct construction standards. Lowvelocity ductwork design is very important for energy efficiency in air distribution systems. Principle of duct design in hvac systems cedengineering.
1440 804 1081 1048 41 609 981 1039 51 1549 879 120 1356 789 1036 698 1163 906 465 490 1583 1569 1152 175 533 1048 823 910 246 72