The passive windows not only provide for low heating bills, but also a warm and cosy home in the cold winter evenings. Being close to the windows you’ll notice that there is no cold blowing from them any longer.
The only thing you will be deprived of is the frost patterns on the window pane as due to excellent heat resistance they will appear no more.
The distinguishing feature of the passive windows design is a thicker frame, double SG and an additional insulation pad on the frame and sash.
Heat transfer coefficient of a
standard double-SG window
U W = 1,5−1,6 ( W / m 2 ×K )
Overall heat transfer coefficient
for PASSIVE WINDOWS
is in the range of
U W = 0,74−0,8 ( W / m 2 ×K )