Olsson A.
Bibliographic info:
In 2nd International C.I.B. Symposium on Energy Conservation in the Built Environment. Copenhagen May 28-June 1 1979 preprints session 1. p133-139

Reports measurements made on windows in old blocks of flats in Sweden. Measurements were taken of air-leakage through 21 windows under different air pressures before and after the renewal of draught excluders between window frame and casement. Concludes that draught proofing of old windows is extremely effective. Heat flow through 18 double-glazed windows is also measured and two systems of converting double to triple glazing are studied. Conversion was found to improve u values by approximately 35%.