The field performance of partially open dual glazing

Constraints Associated With Pan 56 and Natural Ventilation

“…Studies have been undertaken by others to identify the ventilation performances of this arrangement of glazing [2]. The findings of this exercise are as follows: It can be seen that the ventilation rate is similar to that achieved with a partially open single glazed window (see Table 1).…”

“…• The noise spectrum was taken from free field measurements of road traffic noise in an inner city location The A-weighted level difference provided by the open window is calculated to be 14 dB which is consistent with the guidance contained within the current PPG 24 and previous work conducted by others. [2] For comparative purposes the sound reduction provided by the facade was calculated with the window shut. It can be seen that by partially opening the window a significant reduction in performance results especially at mid to high frequency.…”

Research Into the Acoustic Transmission of Open and Closed Windows

“…Watt University (1972 -73) [9], [10] A vertical sliding sash window open 0.027 m 2 (summer night-time ventilation) and 0.36 m 2 (daytime summer ventilation) provided a sound level reduction of 16 and 11 dB(A) respectively. (Lab Study) Kerry and Ford (1973 -74) [11], [12] A horizontal sliding sash window open 25 mm and 200 mm provided averaged sound reduction indices, R av of 14 and 9 dB respectively. (Field Study) Lawrence and Burgess (1982 -83) [13] [14] A vertical sliding sash open 9% of the total façade provided a sound reduction index R w 10 dB.…”