B-FOLD

Window Uw

from 1.13 W/m²K*

Thermal transmittance Uf

1.33 W/m²K

Wind resistance

Class C1

Air permeability

Class 2

Watertightness

Class E1050

Acoustic insulation

Rw ≤ 31 dB

Glazing up to

50 mm

Installation depth

74.5 mm

Uw — thermal transmittance of the whole window (frame + glass unit), for a 1.23 × 1.48 m window with the best glass unit for the system. The exact value depends on size and glazing — we state it in the quote. * calculated by us to EN ISO 10077-1.

Uf is the thermal transmittance of the frame only. The Uw value for the whole window depends on the glazing and dimensions.