Heavy gauge galvanized plate paneling. Perimeter panels with non-cutting edges; alternatively the structure may be made of polyurethane foam panels.
Centrifugal electric extractors with non-spark nozzle and inspection hatch.
Air filtration is guaranteed: for the DRY-A model by a double filtering stage (cardboard filter and fiberglass filter) for the DRY-C model by a paper filter with seven layers (with decreasing section), with a post-filter of polyester felt.
For further improvement of filtration, fiberglass filter are also installed.
Clogged filter signalling system.
Ceiling light with a high light yield coefficient. Electric command and control panel, with low voltage pushbutton panel.