A Metal frame window system for high indoor humidities

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ConferenceProceedings of the 2nd CSCE Conference on Building Science and Technology: 10 November 1983, Waterloo, Ont. Canada
Pages127147; # of pages: 21
Subjectwindows; condensation; surface temperature; relative humidity; glazings; energy conservation; Moisture performance
AbstractTo increase the surface temperature of a metal window system for a portion of a new building (less than 5% of the windows) in order to permit 50% relative humidity at 22 degrees C without condensation, the following techniques were investigated: triple glazing by use of a double-sealed unit in an exterior frame and single-glazed interior frame; pressurization of the air space between the inner and outer frames, with dry air at room temperature; and provision of supplementry heat to the sill of the inner single-glazed frame. The total energy consumption for the pressurizing air and sill heater for the winter period October 1981 to April 1982 was 166 MJ per meter of window width. It is suggested that such an approach might prove economical in situations where a small portion of a building has unique occupancy requirements, or where an occupancy change requires retrofitting of a window system.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number23094
NPARC number20378438
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Record identifier24d5a472-635d-42c4-b6d0-899db6eee3c9
Record created2012-07-24
Record modified2016-05-09
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