recuperative air heater

recuperative air heater

[rē′küp·rəd·iv ′er ‚hēd·ər]
(engineering)
An air heater in which the heat-transferring metal parts are stationary and form a separating boundary between the heating and cooling fluids.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.