relief opening

relief damper, relief opening

A damper in an air-conditioning system which opens automatically, relieving the buildup of air pressure within the building or air-conditioned space.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
The 22-year-old Commonwealth champion and world medallist admits to little more than a sense of relief opening the email that told him officially on Thursday morning he'd made the team, the disappointment of his failure to get there in his preferred event of the 200m breaststroke still outweighed by the pride.
Assuming the DoL was in a position, from a legal and policy standpoint, to provide regulatory relief opening the door to the creation of open MEPs, it is not clear the DoL would do so.
Willamette River Relief Opening at milepost 2.5: Watch for construction vehicles entering and exiting the highway.
Willamette River relief opening: Watch for construction vehicles entering and exiting the highway.
Willamette River Relief Opening a: Watch for construction vehicles entering and exiting the highway.
Coast Fork Willamette River Relief Opening at milepost 1.5: Watch for roadside construction equipment and crews.
Willamette River Relief Opening: Traffic is in a temporary detour on the highway's south side.
Willamette River Relief Opening at Milepost 2.7: Traffic is in a temporary detour on the north side of the highway.