ASHRAE Duct Fitting DB Lite

The new HVAC ASHRAE Duct Fitting Database (DFDB) Lite 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 of Fundamentals. It includes 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 mobile app that works on both the iPhone and iPad:

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. It includes a useful search feature that allows you to type in a partial or full fitting code name to quickly retrieve it.

5. It allows you to display and email two types of reports. The app reports also include a spreadsheet attachment that you can open on your desktop computer to do further analysis.

6. The app displays inputs and results in both IP and SI units.

7. Works on both the iPhone and iPad and adjusts its user interface according to the proper size screen.

The ASHRAE Duct Fitting Database application was designed by Carmel Software Corporation exclusively for ASHRAE.