Thu Sep 16, 2021

Hepa Fan Filter unit for clean room

Hepa Fan Filter unit for clean room

Hepa Fan filter unit (FFU) is a type of motorized air filtering equipment. It is used to supply purified air to cleanrooms, medical facilities or microenvironments by removing harmful airborne particles from recirculating air.[1] The units are installed within the system's ceiling or floor grid. Large cleanrooms require a proportionally large number of FFUs, which in some cases may range from several hundred to several thousand.[1][2] Units often contain their own pre-filter, HEPA filter and internally controllable fan air distribution.

Application of Fan Filter Unit

Accumax India ceiling mounted hepa Fan Filter Units are designed to be placed in ceiling grid bays with similar dimensions.[3] Ceiling grids with standard size bays that match FFU dimensions are used to construct cleanrooms. Depending on the cleanliness requirements of the controlled space, more fan filter units can be added to the grid in order to meet ISO standards for airflow velocity and air changes per hour.[4] FFUs can be used in place of a more conventional recirculating air unit such as a ducted or plenum air system.[1][2] As Portable HEPA fan filter unit require space above the ceiling grid (13" for the FFU module plus another 1–2 feet of "empty" air-filled space), plenums are commonly used for clean rooms with height restrictions; they are the only air systems that work in layouts with smaller internal floor dimensions.[2] Additionally, when less than 20 filters are installed in a room, a fan- powered HEPA, FFU is generally considered to be less expensive than a more conventional ducted supply system.[5] When a microenvironment of clean air is required, FFUs can be used to construct enclosed work spaces, or Laminar Flow Cabinets. Applying the same principle as the larger cleanroom grid, FFUs can be placed directly in a free- standing grid above the space that requires clean air. In fact, this approach is also used for silicon wafer etching in the semiconductor industry.

Technical Specifications

External size

WxDxH 600x600x350mm



Air flow(m3/h)


Air Velocity (m/s)



97 (10mm Aq)

Control system

Power on/off

Hepa Filter

99.978% @ 0.3um


<220pa @ 0.45m/s

Electric Supply

220/230V AC, 50/60Hz



  • Contamination Control: By removing particulates from the air, FFUs help maintain the stringent cleanliness levels required in cleanrooms.
  • Modularity: FFUs can be easily added or repositioned within a cleanroom ceiling grid to meet specific airflow requirements.
  • Energy Efficiency: Advances in fan and motor technology have made modern FFUs more energy-efficient, reducing operational costs.


  • Pharmaceutical Manufacturing: Ensuring that the production environment is free from contaminants.
  • Semiconductor Fabrication: Maintaining particle-free air to prevent defects in microelectronics.
  • Biotechnology and Research Labs: Protecting sensitive experiments and processes from contamination.

Selection Criteria:


When choosing a HEPA FFU, consider the following factors:

  • Airflow Capacity: Measured in cubic feet per minute (CFM), matching the unit's capacity to the cleanroom's requirements is crucial.
  • Filter Efficiency: Ensure the filter meets the required HEPA standards (usually 99.97% efficiency at 0.3 microns).
  • Noise Level: Important for maintaining a comfortable working environment.
  • Energy Consumption: Opt for units with efficient motors and variable speed controls.
  • Maintenance: Consider the ease of replacing filters and servicing the unit.

Contact Accumax India for Cleanroom Fan Filter Units

Request a quote today or Contact Us to learn how our fan filter modules can integrate into your unique application. In addition to our high-performance ULPA and HEPA fan filter units,Accumax India designs and manufactures a full line of cleanroom products,including Air ShowerPass BoxBiosafety CabinetDispensing Booth.For all your industrial cleanroom and fan filter unit needs, choose Accumax India.