Regenerative Dual Duct: A Case Study

Lentz, Mark S.
January 2009
Heating/Piping/Air Conditioning Engineering;Jan2009, Vol. 81 Issue 1, p20
Case Study
The article presents a case study on how a Wisconsin school district saves energy with 100% outside air. At the Wausau School District, two of three boilers were not working and classrooms would not heat or cool properly. Under facilities director Dennis Wald, the causes of the problems were investigated and his first challenge was repairing the chilled-water system. To lessen noise levels, new plenum fans were selected and to save energy, the main systems were converted to variable volume.


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