The hinge side of the aluminium windows philippines can increase the hidden hinge to achieve sealing effect, on suspension window hinge side on the middle lock, in the previous design, window generally choose among monolock point lock, but some distance from the upper lock rocker arm hinges, far cannot guarantee the sealing effect, especially in high-rise building is more serious, so in the design in the future.

If the fan height is less than 1400mm, a 500mm single-lock point intermediate lock can be used; if the fan height is greater than 1400mm, a two-lock point intermediate lock can be used to ensure good sealing effect.