This dataset contains the results from the tank testing in the Lir Ocean basin of a  30th scale fixed OWC scale wave energy device. The results include the pressure and water column oscillations for a series of regular and irregular wave tests. The recorded incident waves are also provided. This dataset forms part of a larger round robin campaign whereby this device was tested in 2 other facilities namely Ecole Central Nantes and the University of Plymouth. The paper available at https://doi.org/10.1115/1.4051164 uses some of, and explains further, the data.