Table of contents hvac systems duct design fourth edition vii foreword. Ductwork sizing, calculation and design for efficiency. The purpose of residential ductwork design is to properly distribute the airflow, produced by your heatingcooling system, to your house. The rectangular duct therefore requires more metal for its construction, this adds more weight and costs to the design. Air leaks could occur where the ductwork isnt sealed. The hvac duct construction standards is a smacna publication which deals with all aspects of metal and flexible duct construction.
Zoning duct design guide for mechanical system designers. Exposed architectural duct has both interior and exterior applications. Test one representative low pressure supply air duct section on each floor consisting of ductwork between the terminal reheat coil, or vav terminal and the outlets. Duct system design guide first edition 2003 mcgill airflow corporation mcgill airflow corporation one mission park groveport, ohio 43125 duct system design i notice. Smacna technical manuals and standards book price list. Includes a spiral duct chapter for classes 1 and 2, covers design pressures ranging from 30 wg negative to 50 wg positive, plus carbon and galvanized steel tables.
Youre ready to replace an old hvac system or perhaps youre building your dream home. Flexible duct flexible coupling hoods transitions 18 note. Fundamentals distribution systems 2 space availability the sizing criteria will often be defined by the space available to run the ductwork figure 1. Understanding basic residential ductwork design please note. No part of this work may be reproduced or used in any form or by any means graphic, electronic, or mechanical, including photocopying. Click the links above to see additional information, case histories, and. Our stateoftheart equipment and proprietary machinery offers us the capability to produce high quality, high volumes of various ducting in over 500,000 square feet of manufacturing space. Smacna hvac duct construction standards metal and flexible, 3rd ed. Rightsizing of a heating, ventilation, and airconditioning hvac system is the selection of. Why is a residential manual d duct design important. As a fullservice design, build and install contractor, ivi, inc. The importance of sizing ductwork for dust collection. Highvelocity hv duct systems are characterized by air velocities in the range of 2500 to 3500 fpm. At us duct, ductwork design is a key part of operation.
Our staff is committed to assisting you in every phase of your project. Generally at the time of designing an air conditioning duct system, the required airflow rates are known from load calculations. On the fabrication floor at zen industries, we have experience fabricating efficient airflow systems that act as an integral part of a buildings architectural design. The third edition of the hvac duct construction standards metal and flexible is intended primarily for commercial and institutional duct construction. All information provided in this document is to be used as a guideline only. Ductwork is used to carry the dirt and air from the collection point to the collector.
Lowvelocity design will lead to larger duct sizes, but it may be worth since, doubling of duct diameter. The procedures of residential hvac design see figure 1 are covered in detail by a series of publications produced by the air conditioning contractors of america acca, which in turn. This american national standard ansismacna 0062006 contains tables and details for constructing ductwork for. It is designed for use by design ers of industrial ventilation and air pollution control systems. Friction in a system means the fan needs to work harder and this results in higher operating costs. Smacna round industrial duct construction standards updated. Hvac duct construction standards metal and flexible. Deficiencies in duct design can result in systems that operate incorrectly. Source book for efficient air duct systems in europe inive. Paul guyer is a registered civil engineer, mechanical engineer, fire protection engineer, and architect with over 35 years experience in the design of buildings and.
Hvac duct construction standards metal and flexible, 3rd. Book by sheet metal and air conditioning contractors national association, 2005 view all product details. Book by sheet metal and air conditioning contractors national association, 2006. Manual q commercial low pressure low velocity duct system design. Providing superior flex duct for temporary portable heating, air conditioning, ecu, pca, ventilation industries, and more. Total pressure, velocity pressure, and static pressure.
The duct goes through an assembly line setup where insulation and insulation covering. At first glance there seems to be great similarity in the design goals of these different types of duct systems making one job as easy as the other. Duct design quick introduction duct sizing tools and methods recommended duct velocities and noise effects duct fitting pressure losses do and donts of duct design duct applications as 4254. The length of duct used for design purposes that includes the. When diffusers, registers, and grilles are mounted to supply, return, and exhaust ducts, velocities should not exceed 1500 fpm or noise will result. Acca manual d residential duct designs the 3rd step in the quality hvac design process. Us duct, an american manufacturer of industrial ducts and industrial ductwork solutions, focuses on delivering quality products quickly and at the best price. The 660 pagebook includes expanded tables for stainless steel and aluminum, expanded tables for duct sizes up to 96 inches in diameter, plus class 5 systems handling corrosives and spiral lockseam pipe. This 1999 edition of the rounded industrial duct construction standards expands the scope of the 1977 version, and updates the original text to incorporate a revised theory of design, new materials and more user friendly tables. Smacna round industrial duct construction standards. Provide balancing dampers at supply, return, and general exhaust branches when connected to larger ducts, as required, for air balancing.
Manual q commercial low pressure low velocity duct system. Hvac and industrial ventilation duct design by bill smith, president of elite software sizing ductwork for standard hvac applications is daunting enough, but doing it for industrial ventilation and exhaust systems can be hair raising. Hvac domestic and industrial ventilation systems ventilation can simply be described as the process of changing air in the enclosed space. Established in 1983, nti global has been in business for over 30 years. Need a unique solution to solve a space or design problem that traditional duct plus insulation may not be able to address. 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. Ductwork taps shall be conical or clinch collar with 45 degree or boot connections. The round industrial duct construction standards, 3rd edition, 20, is available in both book and pdf. It can be used in most dust extraction and exhaust air systems almost anywhere there is a dust filter collector, baghouse, or cyclone installed. Seal and insulate ductwork even if you follow best practices for ductwork design, if the duct system isnt properly sealed and insulated, it will not be able to deliver the conditioned air you need. Manual q commercial low pressure low velocity duct system design hank rutkowski, rutkowski, hank on. This edition improves upon the second edition with expanded pressure class tables. Kb duct literature library ceco environmental corp.
Fresh air is introduced and circulated throughout the building and the vitiated or stale air is removed or diluted. Ceiling plenums, duct chases, and obstructions such as walls and beams often dictate that a certain size duct be used, regardless of whether or not it is the best size from a. All hose and duct manufactured by novaflex are warranted to be free from all defects in material and workmanship. The dust collector is the main ingredient in getting cleaner air for your shop, but if you cant get the dirty air into the collector efficiently, you risk high energy usage, degraded collector performance, and unsafe conditions in the plant. This information presents the basic methods and procedures needed to design hvac air distribution systems. Smacna 1987 2006 hvac duct systems inspection guide, 3rd edition section 23 31. North, north ryde, nsw 21, australia abstract this paper focuses on a design modification to a number of industrial ducts using computational fluid dynamics. Why should you take this smacna hvac systems duct design part 2 training course. The air duct distribution network is an important component of hvac installations, helping to significantly reduce energy costs and reduce noise nuisance generated by the systems equipment. How to size ductwork for industrial ventilation systems. The larger perimeter also means more air will come into contact wit the material and this adds friction to the system. We make selling industrial ductwork easy for you, with our free 3d ductwork design and quoting software, ontime delivery, personalized service and all of this at a great price. Crimped joint connection length changed from 1 to 2 rectangular branch taps into round added for straight or 45 degree leadinentry 15.
How to size ductwork for industrial dust collection systems. Design optimisation of industrial ducts using computational fluid dynamics dr. Fashion design for dummies interior design for dummies books dummies for sale web design for dummies book 1 2 ad related to duct design for dummies expert ductwork design. Offers a standardized, engineered basis for design and construction of industrial ducts of classes 1 to 5. Decisions are made about the types of systems to be used, building zoning, equipment locations, and routing of ductwork. Quick introduction a good duct design is a balance between.
Our goal is to please our customers, so we understand how important it is for us to supply everything you need for your custom duct design. Calculating the size of the duct segments can be done using a series of calculations known as the velocity pressure method consisting of two primary variables. A properly insulated system saves money by reducing energy consumption and emissions output. Introduction to design of industrial ventilation systems.
The dimensions shown on the following pages of this catalog are essentially shown as center to end dimensions, which apply to both belled end as well as plain end fittings. Baghouse duct design dot com dust collection baghouse. Customized industrial ductwork for better airflow from ivi. Lowvelocity ductwork design is very important for energy efficiency in air distribution systems. Ivi can assist in the design of a new system or the redesign of an existing system. Hvac duct construction standards, metal and flexible. This design solution reduces the total exposure to falls from heights by a factor of greater than 70% when installing the large duct and attachments typical to coal plant air quality projects by prefabricating and assembling the duct sections on the ground. Nordfab ducting is used in a wide variety of industries and commercial settings. Pdf smacna commercial duct design vuong le academia.
Round industrial duct construction standards the program is designed to automate the round industrial duct construction standards published by the sheet metal and air conditioning contractors national association. Major changes from first editionround, flexible and oval duct revisions duct pressure classes revised to be positive and negative at 2, 4 and 10 w. Keeping the proper design temperature is critical in an industrial facility. Uninsulated or underinsulated systems can be costing you money. Coupled with our complete line of extruded thermoplastic ducts, novaflex offers the widest selection of individual products in the industry. Baghouse duct design dot com is a subsidiary business formed during the economic downturn to assist cliental with the design, retrofit, optimization and operator training on air pollution control systems for.
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