Murkka Fenix is an inwardly pivoting or pivoting and angled single frame triple glazing assemblyt wood-aluminium window with the external sash and frame being aluminium clad.

Heat retention:
U-value with standard glass is 0.83
U-value with special glass is 0.79 (VTT estimated, measurement 1230×1480)

Sound insulation: 
Standard glass Rw = 33 dB
Special glass up to Rw = 41 dB