R9 hero shotResidence 9 Flush sash windows has unquestionable market leading design features and performance. It achieves a certified window energy A+ rating and accommodates the most thermally and acoustically efficient 44mm triple glazing and 28mm double glazing, attaining U-values of 0.8 with triple glazing, PassivHaus Standard and 1.2 with double glazing, far surpassing the British Building Regulation requirements. All of this contributes to lower energy bills, keeping you cosy in the winter and cool in the summer.

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Sponsors - NEC