Water Resistance (Factor B)
Watertightness is measured by projecting the equivalent of 20 liters of water per hour per square foot of window surface, the equivalent of 8 in. (200 mm) of rain in 1 hour. Air pressure is increased to simulate winds varying between 35 and 76 mph (57 to 123 kph). Ratings indicate the pressure attained without any interior water leakage, Using High Quality EPDM content sealing Gaskets.
|WIND PRESSURE||WINDOW TYPE|
|300 pascals-6.3psf||B3||High-end DIMEX system
sliding and hung windows
|700 pascals-14.6psf||B7|| DIMEX uPVC Windows & Doors System
fixed, casement and awning windows