IC is a file extension which is associated with software tools such as ASwin, ICwin and SRwin. These are applications developed by the Spanish company Procedimientos-Uno, SL. These are extensive tools that allow you to carry out projects related to central heating and perform related calculations.

IC are files used to store the completed project. They contain all the information that pertains to them, e.g. applied solutions and elements, calculation results. etc. Currently, the IC format is rarely used and is considered obsolete.