Filters & Laminar Flow

Laminar Downflow CAT Units

Atmos-Tech Industries laminar flow workstations have always been one step ahead of the competition. Also referred to as the "CAT" series this system features expandability, mobility, reduced floor space, low maintenance and superb workmanship.

  • Stainless Steel
  • Epoxy Painted Steel
  • Polypropylene
  • Laminated Particleboard
  • Piped Sinks and Faucets
  • Vertical Sliding Shields
  • Airflow Sensors
  • HEPA/ULPA Filters
  • Nitrogen/Gas Guns
  • Custom Sizes
Laminar Downflow CAT Unit
Style Description Size Pack Qty
CAT4302 Downflow CAT Unit 48 in. w x 30 in. d x 30 in. h Each
CAT5302 Downflow CAT Unit 60 in. w x 30 in. d x 30 in. h Each
CAT6302 Downflow CAT Unit 72 in. w x 30 in. d x 30 in. h Each
CAT8302 Downflow CAT Unit 96 in. w x 30 in. d x 30 in. h Each


Ambient air enters the pre-filter area and is forced through a HEPA filter, affording downward laminar flow through the clean zone. The air is then exhausted out the front of the unit. If necessary, the work deck can be perforated to allow air to pass directly through the unit and then out below the work deck.

The operation of the recirculating system is similar to that of a single pass unit. With this system the air is recirculated through a perforated work deck to a rear mounted return duct. This returns the air to the blower intake where it is forced through the HEPA filter again and returned to the clean zone.

Ambient air enters the system at the top, pressurizes the blower plenum, then the air is forced through the HEPA filter. The air travels in a laminar flow across the clean zone and down through the work surface into the plenum area below then exhausts through the rear mounted exhaust duct connected to a remote mounted exhaust blower.

The variable exhaust unit affords the flexibility of exhausting a portion of the returned air (0% to 100%) resulting in a savings of ambient air conditioning and extending the life of the HEPA filter. The variable exhaust may be appropriate where a negligible fume situation exists.


ModelNominal Work Area Unit WidthNominal Work Area Unit DepthNominal Work Area Unit HeightPower
CAT430248 in.30 In.30 in.115V Single Phase
CAT530260 in.30 In.30 in.115V Single Phase
CAT630272 in.30 In.30 in.115V Single Phase
CAT830296 in.30 In.30 in.115V Single Phase