Air-Handling Systems, Energy, and IAQ - Trane
Air-Handling Systems, Energy, and IAQ - Trane
Air-Handling Systems, Energy, and IAQ - Trane
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lower supply-air temperature<br />
Minimizing Comfort Problems (Dumping)<br />
…or use fan-powered VAV terminals as “air blenders”<br />
primary air<br />
(45°F)<br />
57<br />
parallel fan-powered<br />
VAV terminal<br />
© 2009 <strong>Trane</strong><br />
plenum air<br />
(80°F)<br />
supply air<br />
(55°F)<br />
lower supply-air temperature<br />
Avoiding Condensation<br />
58<br />
© 2009 <strong>Trane</strong><br />
primary air<br />
(45°F)<br />
plenum air<br />
(80°F)<br />
supply air<br />
(55°F)<br />
series fan-powered<br />
VAV terminal<br />
� Properly insulate <strong>and</strong> vapor-seal<br />
ductwork, VAV terminals, <strong>and</strong> supply-air diffusers<br />
� Use an open ceiling plenum return, if possible<br />
� Maintain positive building pressure to minimize<br />
infiltration of humid outdoor air<br />
� Monitor indoor humidity during unoccupied periods<br />
<strong>and</strong> prevent it from rising too high<br />
� During startup, slowly ramp down the supply-air<br />
temperature to pull down indoor humidity<br />
� Use linear slot diffusers to increase air motion<br />
© <strong>Trane</strong>, a business of Ingersoll R<strong>and</strong> 31
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