EWI may refer to:
- EWI (musical instrument), an electronic wind instrument
- EastWest Institute, an American think tank
- Edison Welding Institute, in Ohio, United States
- Enarotali Airport, in Indonesia
- Energiewirtschaftliches Institut, an economics research institute at the University of Cologne
- Expert Witness Institute
- External wall insulation
This disambiguation page lists articles associated with the title EWI.
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