Box flue

Roman box flue tile from Foscott Roman villaA brick consisting in effect of four tiles joined at their edges, open top and bottom, to conduct the hot air of a Roman hypocaust system up the walls to escape at the eaves. The exposed faces of the box flue tiles were often decorated in relief to provide a key for the wall plaster which normally covered them. Box flue tiles have been found in many places in Buckinghamshire, including Church Farm, Saunderton.