The inputs can be adjusted by touch, and installation is automatic. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files. From autodesk comes the free duct fitting table viewer addin. Ashrae duct fitting database this database, available on cd, includes loss coefficient tables for more than 200 round, rectangular, and flat oval duct fittings. Duct design fundamentals pressure losses how loss coefficients are determined c, u u c c u a u n a, a e every fitting has associated loss coefficients, which can be determined experimentally by measuring the total pressure loss through the fitting for varying flow conditions. Smacna cad standard second edition v notice to users of this publication 1. Our own studies united mcgills s how that loss coefficients in branch fittings are more a function of velocity pressure than size, but sizes still have to be known to properly determine the dynamic loss coefficient from the ashrae duct fitting database, so a one size fits all. It includes all of the latest updates that have been incorporated into the desktop version over. The types of fittings to be used based on the designers calculations of fitting losses i. The ashrae duct fitting database application was designed by carmel software corporation exclusively for ashrae. Opening the lost method settings dialog box, no ashrea. Air owwasprovidedbyacentrifugalfan driven by a variable speed motor. When the ashrae table settings dialog box which can be opened by selecting a duct fitting and clicking the edit button beside loss method settings in the properties palette is opened, none appears in its leftmost panel.
This means that it works on both the iphone and ipad and adjusts its screen accordingly. Disclaimer of warranties a the sheet metal and air conditioning contractors national association smacna provides its product for informational. The accurate prediction of pressure losses across induct fittings is of. A takeoff as a fitting either connects a runout duct to a branch or trunk duct in order to distribute air to a terminal, or connects as a duct the header duct to the room air distribution devices diffusers, registers or grilles. Ashrae duct fitting database american society of heating, refrigerating and airconditioning engineers this menudriven databases includes loss coefficient tables for more than 200 round, rectangular, and flat oval duct fittings. Angle of the radius calculate the pressure loss of the duct fitting in a 600mm w x 200mm h duct with a radius of 600mm and a 90 bend angle. About file types supported by ashrae duct fitting database aims to be the goto resource for file type and related software information. This app is also compatible with the latest versions of iphone and ipad and ios. Rectangular elbows see ashraes duct fitting database program. Dfdb maintenance is by ashrae technical committee tc 5.
Ashrae duct fitting database relates to education tools. Click here or call 80087020 or 5416844665 to request information or a live demo. This addin provides a way to view the illustrations and the data table of available duct fittings from the. In over 50 years of serving the mechanical system marketplace, mcgill airflow has gained a technical expertise, which is unmatched in the industry. Revit mep utilizes the ashrae american society of heating refrigeration and air conditioning engineers duct fitting database to lookup coefficients that are used for determining pressure losses through duct fittings. Calculate the thermal gravity effect for the twostack system shown in figure 2, where the air is 120 c and the stack heights are 15. The program displays the coefficient table, by clicking on the show table button, the user can see the lookup table that revit utilizes for the selected fitting. Featuring pictorial outlines of each fitting, this cd is useful to design engineers dealing with a. Trusted windows pc download ashrae duct fitting database 5. Rightcommduct is a fast, easytouse commercial duct sizing and calculation software that takes full advantage of ashraes precision measurements and duct fitting database. Use this mobile app in the field for quick duct pressure loss calculations. Hvac ashrae duct fitting database for ios free download.
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. With rightcommduct, compute duct and fitting size based on air flow with appropriate velocity limits, and let the software. This addin provides a way to view the illustrations and the data table of available duct fittings from the database. Duct designer streamlines duct design and improves calculation precision, letting you optimize your designs.
Highvelocity hv duct systems are characterized by air velocities in the range of 2500 to 3500 fpm. Jan 29, 2014 revit mep utilizes the ashrae american society of heating refrigeration and air conditioning engineers duct fitting database to lookup coefficients that are used for determining pressure losses through duct fittings. Opening the lost method settings dialog box, no ashrea table. The hvac ashrae duct fitting database dfdb for the iphone and ipad is now a universal app. Fan system effect coefficients are only an approximation. A given fitting may be assessed to obtain loss coefficient data and. Featuring pictorial outlines of each fitting, this cd is useful to design engineers dealing with a variety of duct fittings. The advantages of this mobile app are that you can easily use it out in the field to do quick duct pressure loss calculations, the inputs can be adjusted by touch, and installation is automatic. Hvac ashrae dfdb help the hvac ashrae duct fitting database dfdb universal app for the iphone and ipad was developed for ashrae by carmel software corporation. The database interface features fully available input, output, calculations, and table data properties. Duct calculator is a powerful tool that provides access to duct calculation and sizing capabilities either. Raw duct is fabricated for proprietary duct connection systems.
In over 50 years of serving the mechanical system marketplace, mcgill airflow has gained a. Ductsize lets you create a complete duct system from start to finish, and gives you control over every aspect of the design. 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. Purchasers receive a oneyear subscription for cloudbased access to the duct fitting database ver. Hvac ashrae duct fitting database for ios free download and. Research article pressure losses across multiple fittings. Hoods vc velocity at common section, ms subscripts. Contact us to find out why more contractors switch to quotesoft pipe and duct cost estimating programs, and who uses quotesoft in your area. Users reported that some of the duct fitting families that are included with the revit software have these unexpected properties. A comprehensive duct layout indicating sizes, design airflows, pressure class, and routing of the duct system. Hvac systems duct design fourth edition xi tables page 2.
A procedure for predicting pressure loss coefficients of. Ashrae duct fitting database free version download for pc. Get ashrae duct fitting database alternative downloads. Chapter 21, duct design, was reorganized for ease of use, and updated for data from the latest version of the ashrae duct fitting database. Pressure losses across multiple fittings in ventilation ducts. Smc tdc, slipdrive and raw sheet metal connectors, inc. Ashrae duct fitting database download this database. The primary objectives of the contest were 1 to gain confidence in the use of cfd to determine the loss coefficients for duct fittings and 2 to eliminate laboratory fitting tests in compliance with ashrae standard 120. The application was developed for the iphone, ipod touch and ipad, and allows users to perform pressure loss calculations for more than 200 hvac. Example of duct fitting loss v u upstream velocity of fitting h height of the duct w width of the duct r radius of the bend.
Ashraes duct fitting database dfdb desktop application has become more flexible as a smart phone app, allowing for engineers to make calculations in the field and get results they need quickly. Research project 1493, cfd shootout contest prediction of duct fitting losses. This database, available on cd, includes loss coefficient tables for more than 200 round, rectangular, and flat oval duct fittings. Ashrae 2012 ashrae duct fitting database v 60001 also. For any given fitting, the user may enter the flow rate and fitting information and obtain loss coefficient data and associated pressure loss. Search for library items search for lists search for contacts search for a library. A procedure for predicting pressure loss coefficients of duct. Apr 18, 2020 ashrae duct fitting database ashraeduct. This app is based upon the popular ashrae duct fitting database desktop application. See the elbow charts in the ashrae duct fitting database. Find, download, and install ios apps safely from the app store publishers description. Fitting loss coefficients fittings to support examples 6 and 7 and some of the more common fittings are reprinted here. Chapter 22, pipe design, has a new title and now incorporates the content of its sister chapter, pipes, tubes, and fittings, from hvac systems and equipment.
Research article pressure losses across multiple fittings in. A practical approach to design, implementation, connolly, t. This addin provides a way to view the illustrations and the data table of available duct fittings from a database. This database, with cloudbased access by annual subscription, includes loss coefficient tables for more than 200 round, rectangular, and flat oval duct fittings. Lowvelocity design will lead to larger duct sizes, but it may be worth since, doubling of duct diameter. This is the biggest update to the ashrae duct fitting database app in years. Featuring pictorial outlines of each fitting, this database is useful to design engineers dealing with a variety of duct fittings.
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