Series 25 Mid-Range

A mid-range vertical sliding system with higher capacity spring balances that allow treatment of larger windows and also support thicker glass when higher levels of noise insulation are needed. With secure locking it achieves Secured by Design accreditation. The sliding sashes contra-slide to assist with cleaning and a minimum frame to frame gap of 75mm is recommended.


Warmer

The Series 25 window has not yet been assessed for thermal insulation but it should compare well with the heavier Series 90 system which, will reduce heat loss by up to 50% using standard glass and up to 65% with a thermally efficient glass (low-e). The system is also fitted with high performance brush seals that will almost eliminate drafts and ensure much greater comfort near the window.

Quieter

The Series 25 window has not yet been laboratory sound tested but it should compare well with the Series 20 system which, set 100mm apart from the existing window, will reduce noise levels by more than 40dB (decibels). In most circumstances this will achieve World Health Organisation guidelines for quiet living and working environments. The Series 25 system also accepts thicker glass and this will improve insulation levels over and above the Series 20 levels.