The main and secondary ducts are generally calculated on a basis of 0. Fastduct is readytogo hvac estimating software designed to meet the needs of commercial and industrial sheet metal contractors who need a fast and accurate tool to estimate construction costs. Choose the units youre most comfortable with m3h or ls or cfm. Ductsize hvac duct sizing and analysis duct sizing with full control. And it shows the velocity andor static pressure loss of air for both types of duct shape. The duct calculator app for iphoneipad is a modern take on a the classic duct sizing wheel, allowing you to to quickly and accurately size a new duct or. Ductuputer for windows is a duct sizing calculator that can find air volume, velocity, friction loss and duct size only by entering any two factors. 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. This app allows users to calculate duct size, velocity, pressure drop, and. Variable specification of maximum air speed, maximum duct height, etc. Enter airflows, and click the calculate button for results. Online ductulator duct size calculator ductcalc online duct. Enter duct airflow cfm, duct velocity fpm, duct length and the number of bends. Online calculator to calculate the area of a rectangular duct.
One end will have an end cap and the other end will be raw, notched at 12 for easy field modification. Ductwork sizing, calculation and design for efficiency. Scroll down for a diagnosis with causes andor remedies. Sizing of air duct can be done using velocity method, constant pressure loss method and static pressure recovery method.
Simply enter the values into the fields, choose the shape of ducting and units of measurement and see the results. Elite software 30 hvac software programs for all aspects of hvac, plumbing. The velocity in a 12 inch duct with air flow cfm can be calculated as. You can use ductsizer when you need quick, accurate answers to straight. 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. We wont take your credit card details, and you dont sign a contract. Air duct calculator duct velocity duct airflow fpm cfm duct diameter round inches of water inches friction loss per 100 of duct flexible duct friction loss calculator sheet. Simscale is not just limited to ductwork design, its also used for data centers, aec applications, electronics design, as well as thermal and structural analysis. Choose how you want to select your duct then grab the sliders and move them until you have the information you need. It works with ip units united states, united kingdom and metric units canada, europe, russia, middle east, asia. Excel, calculation, sizing, duct, pressure, loss, drop. Duct calculator elite is an industry leading tool designed to simplify the job of duct sizing for hvac professionals. Enter round duct diameter inches, duct airflow cfm, duct length and the number of bends.
Properly ventilated homes use 1 cfm per square foot of space. Simple calculator for calculating the area of a rectangular duct online. A windows application for sizing new heating and air conditioning ducts. When you price a tender document, one way or the other you will have to calculate the installed price of the ducting. Duct crosssectional area, air flow rate and air speed are used in calculating the duct size. Heat conduction and thermal resistance for steady state conditions and one dimensional heat. Whether using a friction chart or duct calculator, always check the velocity on the friction chart or duct calculator. Hvac duct calculator software psychrometric and duct calculator v. If the velocity in the duct is too high, the negative consequences can be. 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. Hvac estimating software free demos from the rapidbid website dont need any payment.
From our awardwinning ductmaster thermal for unheated spaces to our selfseal range that ensures minimum air leakage and speedy installation, we have the most innovative ducting solutions for your needs. Equivalent diameter is the diameter of a circular duct with similar. You can let the program size all the ducts for you using three different sizing methods, or enter your own sizes to analyze an existing design. Its just a straightforward calculation that gives us the design friction rate from the two quantities i. Duct design 4 calculating friction rate energy vanguard. Thousands of users have downloaded this useful application for. Rightcommduct is a fast, easytouse commercial duct sizing and calculation software that takes full advantage of ashraes precision measurements and. No matter if you start from airflow values, size a parameter or velocity values, you will get the results immediately. Sizing of air duct can be done using velocity method, constant pressure loss method and static pressure. Rectangular duct is rounded up to the nearest 14 inch. These pdf files are easily printable, so you can take a copy on the roof with you if you need one. Diameter converter, which allows converting circular to equivalent rectangular ducts.
No matter if you start from airflow values, size a parameter. 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. Online ductulator duct size calculator ductulator is an engineering tool to calculate air duct dimensions based on given inputs including airflow, duct material roughness and either air pressure static loss friction method or air velocity velocity method. Duct calculator elite ducting size calc for hvac for ios. We offer a comprehensive range of ducting systems and grilles for all ducted applications, from pvc ducting of all types and sizes, to attenuation to reduce noise.
Duct designer streamlines duct design and improves calculation precision, letting you optimize your designs. We recommend sizing fabric ducts and diffusers by velocity or the air speed in the duct. Some people may use average rates based on costkg or cost per area but. Excel, calculation, sizing, duct, pressure, loss, drop, local. We support takeoff and reporting of rectangular, round, and oval ductwork as well as sheet metal and hvac equipment. Enter friction loss per 100 of duct inches of water, duct airflow cfm, duct length and the number of bends.
Hvac estimating software free demos ductwork calculator. Sizing, duct, ducts, ductwork, air, flow, sizing, friction. The hvac ducting module really makes hvac layout easy. Speedy calcs llc determines from the calculation, the best equipment to meet the systems, or homes, requirements. Hvac duct calculator software free download hvac duct. Ducting supplies and ancillaries the complete ventilation. Duct calculator free software psychrometric and duct calculator v. Ductulator calculator air duct also termed as ductulator is a passage that is used to provide fresh air into rooms, buildings etc. Generally, the velocity should be no more than 700 fpm. For sizing either the trunks or branches simply align the friction rate with the cfm and the duct size will be displayed note. 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. Online ducting calculator to find the diameter of duct size.
Sheet metal estimating software for hvac industry can be used to estimate the cost of sheet metal hvac installing. The velocity reduction method can be used for sizing air ducts. Ductulator calculats duct dimensions using equal friction method or velocity method. Todays installment in the duct design series is a simple one. Air duct calculator duct velocity duct airflow fpm cfm duct diameter round inches of water inches friction loss per 100 of duct flexible duct friction loss calculator sheet metal duct friction loss calculator duct diameter approximate dynamic loss coefficients duct length feet friction loss 2. Online ductulator duct size calculator ductcalc online. Air velocity can be calculated with the calculator below. For example, a 10by10 room will be 100 square feet. For full functionality of all software programs, it is recommended that your system have at least the following configuration. 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. Ductulator calculator air duct velocity calculator. Engineering software for hvac designers and energy calculations.
Cfm and sizing calculations design master software. Is the question asked for measuring a duct or designing a duct. Select suitable velocities for main and branch ducts from the table below. Ductpro sheet metal estimating software is an easy to use yet accurate computer program for calculating cost of material and labor for hvac sheet metal contractors. A calculator that troubleshoots refrigerant and air flow issues of an air conditioner. When it comes to sizing ductwork, you probably rely on a ductulator or its digital equivalent to determine the dimensions for your ducts. Airborne matter must be extracted without leakage of air or product, and to do so, organisations need to invest in highquality, longlasting modular ducting. Custom produced with your company information and in your colors. It is also available within our cad standalone called avicad. The user can choose from three different types of duct construction, and rectangular or round. It calculates both rectangular and round duct dimensions. Mechq ducting module easytouse cad engineering software. Ductsize quickly calculates optimal duct sizes using either the static regain, equal friction, or constant velocity method. Data entry can be accomplished manually or taken graphically from either drawing board or 32bit versions of autodesk building systems 2006 or 2007, or 32bit autocad mep 2008 to 2012.
Figure out the amount of cfm that is required for the room. Duct calculator is a powerful tool that provides access to duct calculation and sizing capabilities either. Use the airflow and size sliders for quick calculations. The program allows the user to input multiple sections and view the overall results. 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. It is recommended to leave in the main ducts at a speed of 3940 to 4300 ftmin 20 to 22ms. Rapid hvac duct sizing is a free trial software application from. Calculator simply enter the values into the fields, choose the shape of ducting and units of measurement and see the results. Select the systems configuration and enter the operating temperatures and pressures. Ductsize lets you create a complete duct system from start to finish, and gives you control over every aspect of the design. Duct sizer software calculates the friction loss in a section of duct. The velocity reduction method can be used when sizing air ducts. This determines the specific blower performance, which then becomes critical in the duct design sizing process.
Air velocity in a ventilation duct can be calculated in imperial units as. Unless within 2%, the diameter is rounded up to the nearest inch. It calculates the right airflow volumes and duct sizes for your system. The mechq hvac duct software module 2d and 3d ducting made easy. A m area of duct m 2 d m diameter of duct m a m width of duct m b m width of duct m example air flow velocity in a duct. Calculation results have been triple checked against the ashrae handbook. Use either an online calculator see resources or a manual one that you can purchase from an hvac distributor. Hvac air duct slide calculators custom duct calculator. Turn to design master hvac for your complete hvac design and drafting solution. Just a quick look on their site and you can find thousands of simulations for everything from buildings, hvac systems, heat exchangers. Use a duct calculator to find the correct duct size. Duct calculator app for iphone and ipad pheinex, llc. Measure the length and width of the room where the flex duct will be supplying the air.
Read round duct diameter inches and friction loss per 100 of duct inches of water. Read round duct diameter inches and friction loss per. Ductpro sheet metal estimating software is an easy to use yet. Mechq hvac ducting module mhvac rectangular, round and flat. Units converter, with which you will be able to transform speed. 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. Here you will find installation instructions for cdis products. Mechq ducting is an addon for autocad, bricscad and intellicad. Pressure drop calculation tool for installations with straight sections and duct system elements. Find the sizes of main and branch ducts from the air flow rates and the velocities by using. Multiply the length and width together to get the square footage of the room.