Larger volumes or higher static pressures should be dealt with on an individual. Using the equal friction design method, this hvac duct calculator can be used to calculate the equivalent round duct. A simple duct calculator, pocket size, forsizing air distribution systems by the equal friction method. Front of calculator includes scales for friction, velocity, round duct size, weight per linear foot of round duct, surface area in square feet per lineal foot of round duct, rectangular equivalents of round duct sizes, weight per linear foot of rectangular duct and surface area in square feet per linear foot of rectangular duct. Friction per 100 feet of duct velocity fpmair volume cfm round duct size rectangular equivalent dimensions inches. You know you have ls and you want a velocity of 5ms in the duct. Choose the units youre most comfortable with m3h or ls or cfm.
Insert ducts to your sketchup model with the engineering toolbox sketchup extension. Online ducting calculator to find the diameter of duct size. It calculates both rectangular and round duct dimensions. Front of calculator includes scales for friction, velocity, round duct size, weight per linear foot of round duct, surface area in square feet per lineal foot of round duct. Download ductulator software for hvac duct sizing for free. Duct sizes can be obtained based on either maximum friction or velocity. While the calculator resembles a wheel similar to those used during the days of slide rules, it incorporates three new fields for equivalent duct sizing, says the developer of the calculator, chris van rite. The user can choose from three different types of duct construction, and rectangular or round. Calculations are for 60f dry air at sea level, from 5 to 3000 cfm approximately standard air which is 0. The velocity reduction method can be used when sizing air ducts. This handy device is the ultimate tool for sizing supply and return duct systems. This equalfriction method of duct sizing should be adequate for normal residential furnace heating and air conditioning applications.
Acca duct calculation slide rule builders book, inc. These new fields help demonstrate the significant loss of. The duct size calculator is intended for use as a quick reference tool for approximating duct sizes and equivalent sizes of sheet metal duct versus flexible duct. Generally, the velocity should be no more than 700 fpm. Online ductulator duct size calculator ductcalc online duct. Do not try any of what you see in this video at home. Select the duct material from the dropdown list most duct sizing tools are typically based on galvanised steel ducting by default enter the air flowrate in litressecond can change to cubic metressecond by use of dropdown to the right of the input. On the other hand, for the hot air ducts, one admits 50% to 75% of the cold air flow according to thermal loads. Includes sizing for metal ducts, and for flexible duct when compressed at 4%, 15%, and 30% straight line compression. A compact metric and imperial duct sizer aka ductulator. This shopping feature will continue to load items when the enter key is. In the next article, well see how friction rate translates to duct sizes and how a duct sizing calculator works. And it shows the velocity andor static pressure loss of air for both types of duct. It is designed for calculating and sizing duct dimensions according to air volume cfm, roughness, velocity, etc.
Velocity duct sizing chart residential main supply trunk ducts, nonzoned systems target velocity of 800fpm used listed by air quantity, round duct size and nearest square duct size 500cfm 11o or 10 x 10 1,300cfm 16o or 14 x 16 600cfm 12o or 10 x 12 1,400cfm 18o or 16 x 16. For example, most techs will tell you that a 6 duct will provide about 100 cfm. Cfm and sizing calculations design master software. Trane ductulator with sleeve, duct sizing calculator customers also shopped for. Type ne a 50% maximum wire fill is specified by nfpa792007, sec. For your comfort, calculator is able to calculate both in metric and imperial units. This ductulator uses the colebrook equation to calculate the smallest duct size acceptable for the selected friction rate and duct type that stays within the selected acca manual d recommended velocities.
How to use a ductulator with the unico system youtube. Way more information than you ever wanted on how to fell a tree. Duct sizer software calculates the friction loss in a section of duct. Duct design 4 calculating friction rate energy vanguard. Enter air flow and its velocity in air duct sizing calculator to find the diameter of duct size. May 25, 2017 other articles in the duct design series. The ductulator is a simple program for air duct sizing. It works with ip units united states, united kingdom and metric units canada, europe, russia, middle east, asia. Just thought sharing this easy to use online ductulator duct size calculator called ductcalc. Whether using a friction chart or duct calculator, always check the velocity on the friction chart or duct calculator. Marinsoft makes it easy for you to test drive marinsoft duct calculator at your leisure with the fully functional evaluation version. Instructions anddesign data are imprinted on calculator. Then you can compare them by choosing different duct shapes to find the best solution for you. The index of roughness k will be modified directly according to the type of duct employed in the calculation of the pressure loss with visualization by procedure placed on the customized command bar.
Enter duct airflow cfm, duct velocity fpm, duct length and the number of bends. Equivalent diameter is the diameter of a circular duct with similar. The duct calculator app for iphoneipad is a modern take on a the classic duct sizing wheel, allowing hvac engineers, designers and contractors quickly and accurately size a new duct or calculate the performance of an existing duct on your ios devices. About us online ductulator duct size calculator ductcalc. This online air duct calculator is used to calculate the velocity of air flow feet per minute fpm, and feet per second fps through any shaped. Purchase ductulator request a ductulator steel duct. If the velocity in the duct is too high, the negative consequences can be excessive noise, duct movement from turbulent air rapid pressure fluctuations and ultimately, reduced longevity. The ductulator duct sizing calculator is a hand held rotating calculator used for sizing supply and return duct systems using the equal friction design method. Duct crosssectional area, air flow rate and air speed are used in calculating the duct size. Duct calculator aladdin metal products curb adapters. Select the duct material from the dropdown list most duct sizing tools are typically based on galvanised steel ducting by default enter the air flowrate in litressecond can change to cubic metressecond by. This online air duct calculator is used to calculate the velocity of air flow feet per minute fpm, and feet per second fps through any shaped circle, square or rectangle ductulator.
Online ductulator duct size calculator ductcalc online. New ductsizing calculator available from ashrae and adi. Enter friction loss per 100 of duct inches of water, duct airflow cfm, duct length and the number of bends. The velocity reduction method can be used for sizing air ducts. Duct sizing calculator software free download duct sizing. Duct size how to size a duct system for a house duration. This accurate, easytouse duct size calculator includes scales for friction loss per unit length, air volume, air velocity, round duct diameter and rectangular duct diameters. Determine the cubic feet per minute and duct sizes for all the rooms. Online ductulator ocean hvac, manualj load calculator. To make the duct work effective, the heating duct size should be calculated correctly. Type mc, nnc metric wiring duct wiring duct size selector. The adi air distribution institute, was formed in 1947 to promote the use of fabricated steel duct pipe and fittings for air distribution products.
The duct sizing calculator is a hand held sliding calculator used for sizing supply and return duct systems using the equal friction, or velocity reduction design method. Using a predefined air velocity, this online ductulator duct size calculator calculates the diameter of round duct and the other dimension of a rectangular duct. Duct sizing in revit, air density, air dynamic viscosity, and air flow are used to calculate duct sizing. It calculates the right airflow volumes and duct sizes for your system. This simple resistance calculator helps you work through what you need for your own shop.
Select suitable velocities for main and branch ducts from the table below. Turn to design master hvac for your complete hvac design and drafting solution. Trane ductulator with sleeve, duct sizing calculator by. Duct designer streamlines duct design and improves calculation precision, letting you optimize your designs. One of the most important numbers to have in trying to figure out the sizing for your duct work is the square footage for each room you will be heating. Calculate the duct size by using a duct calculator. A pdf book for design electrical systems in building such as low current and lighting. Residential main supply trunk ducts, nonzoned systems. It will also determine round duct equivalents for rectangle, flat oval, and elliptical flattened round duct. Useful online ductulator duct sizer duct sizing calculator. Includes residential load calculator, plus duct sizing, equipment selection and cost analysis software for one low price this software includes all the features and capabilities of the permanent versions, however it will expire on your computer 60 days after purchase. And it shows the velocity andor static pressure loss of air for both types of duct shape. Size both round and rectangular ductwork with the ease of a traditional ductulator.
Note that unlike conventional ductulators, this ductulator. You can also do this by checking for them online or by using a manual that is sold by distributors. An inclusive air duct calculator for diameter, velocity, cfm, and pressure drop of various types of duct. Heat conduction and thermal resistance for steady state conditions and one dimensional heat transfer, the heat q conducted through a plane wall is given by. Please watch at highest resolution possible for clarity. Duct sizing needs a ductulator or software but this excel calculator performs the same calculations. Read round duct diameter inches and friction loss per 100 of duct inches of water. Trane td1 ductulator with sleeve, duct sizing calculator. A new duct sizing calculator from ashrae and the air distribution institute adi allows hvac air distribution system designers to more accurately size ducts, especially flex ducts under varying amounts of compression, based on research results. While this may be true, in most cases, for a metal supply air duct, it is not for a metal return, nor a 6 flexible duct on supply or return.
You chose the design method and enter the input data air flow cfm, friction loss or velocity, duct depth and on the right hand side you get the output data duct. This tutorial explains how you can get the calculated duct size value based on pressure drop and air volume using prolisps ductulator. The basic principles of duct design, part 1 energy vanguard. Use either an online calculator see resources or a manual one that you can purchase from an hvac distributor. Tap on the values for velocity or friction to switch between calculation methods. We recommend sizing fabric ducts and diffusers by velocity or the air speed in the duct.
Dual duct vav systems average or high pressure the circuit of the cold air ducts is calculated for 100% of the necessary flow. Enter friction loss per 100 of duct inches of water, duct airflow cfm, duct. Combines the ease of a visual wheel for rough sizing and a numeral calculator. Duct roughness and air properties are adjustable and includes a metric option. The calculator uses information from ashrae research project.
This rectangular air duct calculator is the technicians favorite. Residential duct sizing guide the following duct sizes are based on a fraction drop of. While a duct sizing calculator built for a specific type of ductwork is the best possible method for. By placing our cyclone right at the end of this duct run we only need a single 45 degree elbow and 1. Read on for more information on doing this properly. Duct calculator is a powerful tool that provides access to duct calculation and sizing capabilities either. When it comes to sizing ductwork, you probably rely on a ductulator or its digital equivalent to determine the dimensions for your ducts. Includes scales for friction loss per unit length, air volume, air velocity, round duct diameter, and rectangular duct diameters.
Use a duct calculator to find the correct duct size. Jun 09, 2017 to this point in our little series on duct design, weve been calculating intermediate quantitites. Ductulator calculator air duct velocity calculator. Acca duct calculation slide rule paperback january 1, 2009 by acca author 4. It calculates based on both static pressure loss or velocity and it generates the dimensions for both duct shapes round and rectangular. Rectangular duct is rounded up to the nearest 14 inch. Sizing of air duct can be done using velocity method, constant pressure loss method and static pressure recovery method. Range can be changed, mouse move point calculation, calculate once recycle and twice recycle air flow, summer and winter state, process line shown in chart, press updown button to see process changing, export wmf format file, can. Ductulator calculator air duct also termed as ductulator is a passage that is used to provide fresh air into rooms, buildings etc. Provides the following information with one setting. Duct calculator elite is an industry leading tool designed to simplify the job of duct sizing for hvac professionals. Duct sizing and calculation methods revit products. Superheat and we have produced many different hvac calculators.
The duct size calculator is a quick reference tool for approximating duct size and equivalent sizes of sheetmetal duct and flexible duct. When it comes to sizing ductwork, you probably rely on a ductulator. Ductulator calculats duct dimensions using equal friction method or velocity method. If a room is 250 square feet, the result will be a duct size of 8inch round. This accurate, easytouse duct size calculator includes scales for friction loss per unit length, air volume, air velocity, round duct diameter and rectangular duct. Duct calculator is a powerful tool that provides access to duct calculation and sizing capabilities either as a standalone windows program or from within the autodesk building mechanical design environment. Calculator of different ventilation parameters, with which will be able to obtain the diameter, the air speed, the airflow and the dynamic pressure of your. Diameter converter, which allows converting circular to equivalent rectangular ducts. Excel, calculation, sizing, duct, pressure, loss, drop, local. It is used for sizing supply and return duct systems using the equal friction or equal velocity design methods. Pressure drop calculation revit computes pressure losses in ductwork based on the geometry and roughness of the ductwork, air density, and air dynamic viscosity. Today the alliance of adi member companies produce steel duct.
Find the sizes of main and branch ducts from the air flow rates and the velocities by using. Equivalent diameter is the diameter of a circular duct with similar pressure loss as an equivalent rectangular duct. The program allows the user to input multiple sections and view the overall results. 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. For sizing either the trunks or branches simply align the friction rate with the cfm and the duct size will be displayed note. Ductsize lets you create a complete duct system from start to finish, and gives you control over every aspect of the design. Unless within 2%, the diameter is rounded up to the nearest inch. Were following the manual d protocol for duct design, a standard developed by the air conditioning contractors of america acca. Based on the calculated dimensions, the static pressure loss will be calculated for both duct shapes and dimensions. This app allows users to calculate duct size, velocity, pressure drop, and flow rate for ductwork. Sizing, duct, ducts, ductwork, air, flow, sizing, friction. Dont kill your air flow with this flex duct disease. Today we use all that to find out how big the ducts need to be.