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ERIC Number: EJ919656
Record Type: Journal
Publication Date: 2010-Apr
Pages: 3
Abstractor: ERIC
Reference Count: 0
ISSN: ISSN-0003-0945
Out with the Old
Rydeen, James E.; Stofferahn, Terry; Lange, Jim
American School & University, v82 n9 p33-35 Apr 2010
Displacement ventilation (DV) units use the natural buoyancy of warm air to improve ventilation and comfort. Although relatively new to the United States, DV has been used in Scandinavian countries since the 1970s. Two types of DV can be used in a classroom: (1) Conventional displacement ventilation (CDV) units which are situated on an interior wall and reuse the existing fin-tube radiation on the exterior wall; and (2) Induction displacement ventilation (IDV) which is situated on the exterior wall of the classroom with a heating/cooling coil integral with the IDV. IDV is an excellent choice when renovating an existing school. An IDV unit is situated in each classroom on the exterior wall with ducted minimum outside air to the IDV unit and exhaust high from each classroom. DV systems have occupancy load sensors, which automatically reduce temperature and fresh-air intake when the room is unoccupied, resulting in energy savings. The ductwork is more compact than conventional ventilation systems and other types of DV systems, which is important when retrofitting low-profile buildings with limited space above the ceilings. This article describes the advantages of DV and discusses additional considerations.
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: Elementary Secondary Education; Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A