DALC vs ASHRAE DFDB Lite

This simple to use but effective application is provided by the Sheet Metal and Air Conditioning Contractors’ National Association (SMACNA). This tool allows engineers, architects, designers, and contractors to easily and accurately estimate the leakage of air from ductwork. It also allows a quick and easy way to determine the pass/fail mark for properly specified Duct Air Leakage Tests (DALT). Users can combine multiple sections of ductwork that vary by size and shape to calculate a total allowable leakage. The application uses the method outlined in SMACNA’s HVAC Air Duct Leakage Manual, and provides suggested leakage classes from SMACNA’s latest edition of the manual. The method used is compliant with ASHRAE 90.1, IECC, IGCC Version 2, IMC and the UMC.

The ASHRAE Duct Fitting Database Lite app is a free app that allows you to perform pressure loss calculations for a subset of the 240+ supply, common, and return/exhaust ASHRAE fittings listed in the 2021 ASHRAE Handbook—Fundamentals. These include the following: SD2-1 SD5-9 SR2-1 SR5-5 SF4-1 CD3-1 CD11-1 CR6-1 CR9-1 CR11-1 ED1-1 ED4-1 ER1-1 ER4-1 The following is a partial list of features of this app: 1. You can create individual projects, each with unique input values and results. 2. Each fitting has its own custom set of input parameters and results. 3. You can easily change the minimum and maximum allowable values for all input parameters. 4. The app includes a search feature that allows you to type in a partial or full fitting code name to quickly retrieve it. 5. You can display and email two types of reports. 6. The reports include a spreadsheet attachment that you can open on your desktop computer to conduct further analysis. 7. Inputs and results are displayed in both I-P and SI units. 8. The app works on both the iPhone and iPad and adjusts its user interface according to the device screen size. The ASHRAE Duct Fitting Database Lite application was designed exclusively for ASHRAE by Carmel Software Corporation.