The TERMOPAC is a prefabricated, high density, expanded polystyrene box.

The upper side of the box has longitudinal slots and a mounting profile with a metal sheet for a a perfect fit to the header or lintel, respectively.

The TERMOPAC box base has an outer aluminium profile to support the render and an inner wooden profile to fit the window frame. A profile for fitting the blind can be found in the box's housing.

The TERMOPAC box exhibits great thermal and acoustic insulation.