- box shape: rectangular
- PVC box (optional external aluminum front plate)
- curtain type: aluminum filled with polyurethane foam or PVC
- aluminum and PVC guides
- maximum construction depth of the window frame for a inspection flap at the bottom: 80 mm
- inspection flap from the front and from the bottom from the inside, from the bottom from the outside
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A convenient system that, due to its design, provides better acoustic and thermal insulation, what directly translates into significant saving of thermal energy, especially in the colder seasons of the year. An additional benefit is the possibility of installing a mosquito net.