Roof-top system designed to produce warm air, cold air and air treatment. Cabinet robustly constructed formed by galvanized painted steel pannels fitted with radiant sheet insulation, all set on a very thick galvanized plate. Cooling section with reciprocating hermetic compressor with indipendent circuits, condensing coils made of copper tubes, low sound pressure level axial fans. Heating section with patented high efficiency stainless steel combustion chamber, centrifugal smokes extractor, atmospheric gas burner with electronic ignition. Air treatment section with air mixing plenum, high efficiency filter, centrifugal fans with variable gear, large access door to semplify maintenance. An uptodate electronic microprocessor manage the all unit's operations. The particular U way of the air, enable the inlet and outlet air throw to be on the same side of the unit which makes easy the installation of it.

Box fans with centrifugal fan, casing made of galvanized or plastic-coated galvanized steel self-supporting panels, thermal and acoustic isolation, galvanized steel double inlet three-phase centrifugal fan with variable gear or monophase with three speeds, self-lubrificating bearing.