The HEPA-"High Efficiency Particulate Air" filter is tested for efficiency and certified to be 99.99% efficient in 0.3 micron particles in size.

The ULPA-"Ultra Low Penetration Air" filter is tested for efficiency and certified to be 99.9995% efficient in .12 micron particles in size.

Rolls of borosilicate micro fiber filter medium are pleated with continuous narrow beads of hot melt compound to create the filter media pack. The mini pleat type media pack provides for a lighter, more compact, more efficient filter. Each filter is factory tested and certified for efficiency and airflow resistance at the test flow rate.

Various types of framing are including extruded anodized aluminum, wood (particleboard), poly-pro, galvanneal steel and stainless steel. Frames are available with a closed-cell neoprene gasketing, gel or a knife-edge seal. Face grills are available to protect the filter media from damage.

Atmos-Tech AT-2000 fan filter units are designed to be used in a standard or cleanroom ceiling system. The motorized impeller provides a lower profile than units with larger centrifugal blowers, but can still handle an additional .125" external static pressure. The filter element is individually scan tested to ensure leak free operation. The AT-2000 is available in 95%, 99.99% and 99.9995% efficiencies and varying filter pack depths.