Complies to the requests of the norm NF S 90-351 : Health organizations, hygienic areas - Relative demands for the control of airborne contamination . - Unit "Clean Concept". - Third filtration range with very high efficiency to obtain hygiene standards according to NF EN ISO 14644-1. Very large variety of choice for functions depending on applications. • Flow : from 2 500 to 60 000 m3/h. •Static pressure up to 2 500 Pa. • Functions : - Supply, extract, mixing. - Filtration : first row (prefiltration, protection of high efficiency filter) : Medium Efficiency, in unit entrance. Second row (protection of units elements) : High Efficiency, with pockets, upstream with coils. Third row (contribution to the obtaining of standard hygiene ) : High to Very High Efficiency, downstream fan. - Heating and cooling by water coils. •Air conditioning of dust controlled premises (operating rooms…).