Energy-saving door PREMIUM

Cold outside, warm inside and unique around the world

The Optiwin wooden door PREMIUM, Frostkorken model, is the world’s first front door to have been certified as passive house compliant by the renowned Passive House Institute in Darmstadt (Germany).

Its material composition and ecological insulation ensure a high surface temperature inside and the lowest possible radiation heat loss outside. Even in the entrance area there is no cold air drop so it stays cosy and warm. Choose your own design; we would be happy to advise you.

Advantages

• Frostkorken passive house front door
• 3-pane insulating glazing
• Solid wood frame 93 x 93 mm
• Hinges 3D-adjustable in stainless steel
• Solid-core flush door panel, 100 mm thick double rabbet
• GU Secury Automatic, permanent multi-point lock, automatic opening for access control systems
• Available in all types of wood suitable for front doors
• Up to UD = 0.72 W/m²K
• Q 100Pa = 1.2 m²/(hm)
• Sound insulation Rw`P 37 dB
• Climate class c, d, e
• Intrusion prevention WK II available
• All surfaces possible
• Passive house compliant (certified by PHI in Darmstadt)

Construction

Double rabbet with special plastic door sill, wall connection rebated in cork or plastered in, available with panic devices EN 179 and EN 1125, fire protection EI 2 30 C, inner width 1-sash max. WxH: 1200 x 2400 mm, inner width 2-sash max. WxH: 2400 x 2440 mm.