Flue lining
Flue lining
Fire clay or terra-cotta pipe, either round or square, usually in 2-foot lengths of varying size, used for the inner lining of chimneys.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
flue lining, chimney lining

flue lining
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.