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Chapter Ten
posed on the installation. Electric heating cable may be used. Ceiling
and wall panels use
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⁄
2
- to
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⁄
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-in copper tube or electric cable. Air vent-
ing is a serious problem, especially with floor panels.
Control systems are conventional, since radiant-heat-sensitive de-
vices are not readily available. Floor panels are very difficult to con-
trol, since the relatively large mass provides a slow response. The
supply water temperature is sometimes reset on the outside air tem-
perature.
For a detailed discussion of panel heating, see the ASHRAE Hand-
book.
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