Double Hung Counter balanced window
Evalock’s patented double roller counter balanced system was developed to meet the needs of double glazing. The ease of operation of these windows is similar to that of the box frame window. One sash counter balances the other so the hot air escapes over the top sash and the cool air enters under the bottom sash. Size and therefore weight, are not factors in double glazing as the sash cord is replaced with steel cord for windows weighing over 45kg.
Evalock’s counter balanced windows have been tested and found suitable for
N4 housing rating
1500 Pascal design rating
450 Pascal water penetration rating
Air conditioned application
Evalock’s double hung windows are manufactured to Australian Standard 1288 and 2047