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Proceedings Paper

Frame as an integral part of the window total-energy efficiency
Author(s): J. Antero Punttila; Kari A. Hemmila
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Paper Abstract

Improvement in energy efficiency in the glass part of the window has been remarkable during the last few years. Introduction of low-emissivity glasses, argon and krypton gas filling and the chromogenic glass materials among others, have brought the U-values of the glazing down to 0.7 W/m2 degree(s)C. Even 0.55 W/m2 degree(s)C is possible with the quadruple glazing. However, these super glazings combined with the ordinary frames and sashes are not so effective anymore, because the U-values of the frames are much higher than those of the new glazing. Thus, developing of the thermal performance of the frames and wall connections should be carried out as well parallel to the more fascinating and hi-tech categorized glass research.

Paper Details

Date Published: 25 November 1992
PDF: 5 pages
Proc. SPIE 1727, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Selective Materials, Concentrators and Reflectors, Transparent Insulation and Superwindows, (25 November 1992); doi: 10.1117/12.130524
Show Author Affiliations
J. Antero Punttila, Ekono Building Engineering Ltd. (Finland)
Kari A. Hemmila, Technical Research Ctr. of Finland (Finland)


Published in SPIE Proceedings Vol. 1727:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Selective Materials, Concentrators and Reflectors, Transparent Insulation and Superwindows

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