For the product specs and technical data – see below
https://alukhome.com/gb/en-gb/optio-58bw-flush-window
Main points
- Better weather performance, with friction stay on the windows, reduces damage during windy weather
- U values between 1.2 and 1.4
- High performance with triple glazing it offers a u value of 1.2, giving it a Window Energy Rating (WER) from B-C making this energy-efficient window the ideal partner for refurbishment projects where warmth and comfort are as important as style.
- Impressive air, water and wind resistance test figures (air is class 4 – 600Pa, water is class 9A – 600Pa and wind is E2400 – 2400Pa). This window system can withstand extreme weather conditions, keeping your home warm and dry