Optio 58BW Flush HI Window


Why Choose Our AluK 58BW Flush HI Windows?

The latest addition to our industry-favourite window series, the 58BW Flush offers uncompromised style and performance. This innovative aluminium flush window is a perfect choice for contemporary new-builds and refurbishment projects, with its minimal sightlines, advanced performance, incredible versatility and complete security.

Greater Weather Performance

The 58BW Flush HI achieves more excellent weather performance with friction stays on the side-hung windows, whereas alternatives in the market offer peg stays that are vulnerable to damage in windy conditions. Keep your home warm and comfortable with impressive U-values of 1.2-1.4 W/m2K and class-leading air, water and wind resistance.

High Performance

Low U-values of 1.2 for triple glazing and Window Energy Ratings (WER) from B-C make this energy-efficient window the ideal partner for refurbishment projects where warmth and comfort are as important as style.

With impressive air (Class 4 - 600Pa), water (Class 9A - 600Pa) and wind (Class E2400 - 2400Pa) resistance test figures, this system can withstand extreme weather conditions, keeping your home warm and dry.

Technical performances

  Standard technical data HI technical data
U value W/m²K 1.5 W/m²K 1.2 W/m²K - 1.4 W/m²K
Window energy rating B-C  B-C
Air Permeability (Pa) Class 4 (600 Pa) Class 4 (600 Pa)
Water tightness (Pa) Class 9A (600 Pa) Class 9A (600 Pa)
Wind Resistance Class E2400 (2400 Pa) Class E2400 (2400 Pa)


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