Disclaimer of warranties a the sheet metal and air conditioning contractors national association smacna provides its product for informational. The following duct sizes are based on a fraction drop of. A properly designed duct system is critical to the success of a hvac system. If ducts are not sized large enough to permit adequate airflow, system efficiency can be adversely affected. Hvac ductwork vector stencils library flex duct diagram. Hvac training how to read hvac and pakage unit ducting layout. Our hydraulic analysis software allows piping engineers to design, analyze, and solve complex pipe networks to find flow rates, pressure losses and pump head requirements. Kothe sheet metal publication company, 1937 pipe 270 pages. Slide duct calculator used for sizing round and rectangle sheet metal duct work manufacturer. Pipe flow software for pipe pressure drop and flow rate calculations. Offers the hvac system designer and installer detailed information on duct design, materials and construction methods. Hanger spacing, hanger rod diameter and angle support size. Inside the back cover of this book youll find a software download certificate. Duct sizing and construction tables according to smacna pdf.
Pdf optimal duct layout for hvac using topology optimization. Heating, ventilation and air conditioning drafting samples. Chapter 8 duct design and sealing 143 chapter 8 duct design and sealing duct materials the three most common types of duct material used in home construction are metal, rigid fiberglass duct board, and flex duct. Key lessons learned keep the duct layout short, straight, and simple for best performance.
Round duct calculator for duct design, sizing sheet metal. Hvac ducting principles and fundamentals a pdh online. Sheet metal and air conditioning contractors national association u. Rectangular duct is widely used in the northeastern and northwestern parts of the united states. Highvelocity hv duct systems are characterized by air velocities in the range of 2500 to 3500 fpm. From here you will begin to notice obstructions that your ductwork must get around, and different ideas for duct routing, which will work better for firdowns and final finish. Download hvac duct construction tables according to smacna. Nov 09, 2012 duct designing in air conditioning system and its impact on system performance article pdf available november 2012 with 3,148 reads how we measure reads.
Air flow problems have plagued the hvac industry for years. Royal metal products was founded in douglasville, ga in 1989. Nov, 2017 hvac training how to read hvac and pakage unit ducting layout package unit hvac package unit installation online hvac training course hvac layout design autocad drawing afreenali. In 2005, royal metal products built a new stateoftheart manufacturing facility in temple, ga and in 2007 expanded with. Hvac duct drawings hvac estimating shop drawings duct design zen mep is a service of zen industries inc. Take the velocity of air in the main duct a as 8 ms for both the methods. Layout for duct fittings indoor environment technicians library leo a. High rise healthcare office building hvac renovation and new construction drawings. Use it for drawing hvac ductwork system diagrams, heating, ventilation, air conditioning, refrigeration, automated building control, and environmental control design in the conceptdraw pro diagramming and vector drawing software extended with the. Insulation can also be installed on the inner wall of the duct duct liners, as glass wool duct wraps or duct slabs faced with a glass matting or mesh providing acoustic insulation and strengthening the inner face of the duct. Explain why and how to use mastic and fiberglass membrane. Flexible hose, ducting and accessories 20152016 product.
Illustrated step by step methods show you how to lay out. Pdf duct designing in air conditioning system and its. The online store for wholesale hvac contractors webreps is a divison of webreps, llc. Smacna cad standard second edition v notice to users of this publication 1. Hvac design software duct, piping and system layout programs. Lowvelocity ductwork design is very important for energy efficiency in air distribution systems. Va standard details div 23 hvac steam all details 1 of 2.
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. Material thickness astm type duct end treatment galvanized 26 18 gauge a653 g60g90 48, 60, 72 paint grip 24 18 gauge a653 a60 60 pvs 24 18 gauge a653 4 x 1, 4 x 4 60 raw both ends aluminum. Layout for duct fittings indoor environment technicians. Explain how the acca manual j, s and d load calculation. A final framing plan for each floor must be obtained as soon as possible in. Hvac training how to read hvac and pakage unit ducting layout package unit hvac package unit installation online hvac training. Planning ductwork installation for an hvac heating, venting, air conditioning system starts with a house plan, showing locations of ceiling and floor joists, wall spaces capable of containing ducts and obstacles to be avoided, such as water heaters and pipes and electrical boxes. Larger volumes or higher static pressures should be dealt with on an individual job basis. Make the layout as symmetrical as possible with branch ducts spaced evenly along the trunk duct and each branch of similar length. This equalfriction method of duct sizing should be adequate for normal residential furnace heating and air conditioning applications. Installation of ductwork should comply with smacna hvac duct construction. Lowvelocity design will lead to larger duct sizes, but it may be worth since, doubling of duct diameter.
January 1, 2005 layout for duct fittings teaches practical, easytofollow shop methods for laying out duct fittings. Air distribution basics and duct design hvac design hvac model design hvac proccess design hvac control design hvac controls design hvac piping system design technical notes for hvac design carrier pockethandbook for hvac design hvac design manual for hospitals and clinics. Pdf automated design procedure for duct layout has potential for further improving system efficiency. Effective length the length of duct used for design purposes that includes the straight length of duct added to all the fitting equivalent lengths. Duct calculator can be used on both round and rectangle duct work. Duct layout indicating sizes, configuration, liner material, and staticpressure classes.
The layout and installation of the duct system will incorporate these basic principles of good ductwork design. Both metal and fiberglass duct board are rigid and installed in pieces, while flex duct comes in long sections. It is used as a spacesaver and can be easily routed in overhead space between floor joists, or in an attic. Explain operation of the supply and return air duct systems. Corporate headquarters sheet metal connectors, inc. Increased friction rate in compressed flexible duct. A handbook on the fabrication and installation of heating, ventilating, and air conditioning ducts, round pipes, stacks, fittings, heater, coil, and washer housings otto w. Principle of duct design in hvac systems cedengineering. Both metal and fiberglass duct board are rigid and installed in pieces, while flexduct comes in long sections.
Round duct calculator for duct design, sizing sheet metal duct work manufacturer. But if you want to just save some money and replace an old furnace the furnace book is just for you. Jan 01, 2005 layout for duct fittings indoor environment technicians library leo a. Easytounderstand, stepbystep instructions from an experienced layout man. Although each installation may vary, the toolssupplies listed below provide a good foundation to work from. With rightdraw, you can draw your duct design, or simply place the registers and let rightd design your layout to eliminate the confusing spreadsheets. Fabrication, assembly, and installation, including plans, elevations, sections, components, and attachments to other work. The furnace book a guide for replacing your old furnace. Integration of hvac system design with simplified duct. Va standards are the culmination of a partnership among the department of veterans affairs va, the va administrations, program officials, clinicians, industry, academic and research organizations, expert consultants, and the office of construction and facilities management. Chapter 8 duct design and sealing state of louisiana. Book by sheet metal and air conditioning contractors national association, 2006. Handbook of heating, ventilation and air conditioning. Students or novice designers should read and study this material thoroughly before proceeding with the design sections.
Ordinary heating, ventilating, and air conditioning duct systems read air pressures at 0. Lj assemble, join, install, and repair all types of duct. Residential hvac duct drawings initially for your hvac duct drawing you should start with a simple sketch. How to quickly evaluate a residential hvac duct layout. Hvac duct design hvac systems duct design smacna hvac duct construction duct design residential duct design duct design methods 20 ashrae duct design ashrae handbook fundamentals duct design advanced strategy guideline.
The chart assumes the blower motor and total effective length of the duct system to be adequate for a. The online hvac wholesale store for hvac contractors only. The air duct distribution network is an important component of hvac installations, helping to significantly reduce energy costs and reduce noise nuisance generated by. Design guide for heating, ventilating, and air conditioning systems. However, these decisions cannot wait until field installation. Chapter 8 duct design and sealing 143 chapter 8 duct design and sealing duct materials the three most common types of duct material used in home construction are metal, rigid fiberglass duct board, and flexduct. Situate the air handler close to the center of the layout to minimize the length of ductwork spans. This book or parts thereof may not be reproduced, stored in a retrieval system.
Sheet metal and air conditioning contractors national association, 1981. Duct drawings shop drawings duct design efficient hvac. Apr 23, 2014 the layout and installation of the duct system will incorporate these basic principles of good ductwork design. Residential duct system, manual d, 1995 edition or later. The ductwork installation guide ebook is designed for the people who are planning to become hvac installers or already working in this field. Ducts convey the conditioned air from your heating and cooling plant out through the building and return it back to be conditioned again. Ductwork after studying this chapter, you will be able to. Master any situation with principles and shortcuts few techs know for laying out the patterns for all the common rectangular and round duct fittings and transitions. Rightd is the fast, easytouse residential duct design software that takes full advantage of accas streamlined manual d method.
Poor or no duct design results in rooms and floor that are too hot and too cold. Wraps incorporate an aluminium foil facing that acts as a vapour barrier. Hvac drawings high rise healthcare office building hvac renovation and new construction drawings. How much ductwork will be needed to complete the installation. Residential duct sizing guide key points to remember when using this guide the sizing chart is designed for estimating the airflow in an average system. Identify code requirements regarding sizing, design, and selection of hvac equipment and ducts. Starting with the original authors suggested thought process for analyzing typical problems, the reader is then exposed to a buzzword of our time. Duct designing in air conditioning system and its impact on system performance article pdf available november 2012 with 3,148 reads how we measure reads. Trunk duct board return air branch flex rvalue of insulation supply r6 return r6 room design cfm supply duct sizes supply grilles size, and velocity return duct sizes return grille size and velocity bedroom 1 150 1 8 1 14x6, 600fpm 9 12 14x14, 300fpm walkincloset 15 1 4 1 8x4, 450fpm.
Often the equivalent length of a fitting can be equal to or longer than the straight duct lengths due to the additional. Equivalent length the amount of duct length added to a duct run by fittings. Duct material calculation gi sheet, total sheet required in kgs. Layout for duct fittings indoor environment technicians library. Raw duct is fabricated for proprietary duct connection systems. Design the duct system using a velocity method, and b equal friction method.
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