company news about The Value of Air Recirculation in Modular Cleanroom

Recirculating filtered air is the backbone of modular cleanroom ventilation, accounting for 70–90% of total air supply in most facilities.

 High-efficiency particulate air (HEPA) or ultra-low penetration air (ULPA) filters in recirculation systems capture 99.97% or more of particles as small as 0.3 microns, maintaining the cleanroom’s classification (e.g., ISO Class 5 to ISO Class 8). Recirculation reduces reliance on fresh air, cutting energy costs by minimizing the need to condition external air.

 It also ensures consistent air distribution, preventing stagnant zones where contaminants could accumulate. However, over-reliance on recirculation risks stagnant air quality, as contaminants generated within the cleanroom (e.g., process emissions, human bioeffluents) may not be sufficiently diluted without adequate fresh air.