.EIO File

The eio file extension is used for a configuration output file created in DesignBuilder. Contains model summary configuration output.

Typically found as Eplusout.eio, within the EnergyPlus folder.

Files with eio file extension might be found as configuration output files from DesignBuilder software.

How to open:

There is a free utility called xESOView that can be used to quickly view EnergyPlus eso output files.

How to convert:

Probably can be converted to anything else.