A cleanroom is a specially designed environment with controlled level of airborne pollutants such as chemical vapours, dust, microbes, and aerosol particles. Such areas maintain a low level of particles per cubic meter using a HEPA (High Efficiency Particulate Absorption) filtering system. Often, cleanrooms are classified as class 100 or class 1000 based on the size and number of particles per volume of air.

For all types of data recovery procedures, a high-tech clean room, especially of class 100, is recommended. The humidity and temperature of the room should also be maintained at 45% RH and 70 F respectively.