What is .IN file extension?
File used by the Consolidated Model of Fire and Smoke Transport (CFAST), a program used to model fire and smoke impact on buildings; contains input data, like room specifications, accessed by the program to model fire and smoke effects.
NOTE: IN files are generic, they can be used by other programs for data input.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.