Controlled environments place an emphasis on atmospheric considerations, like air temperature, air pressure, and relative humidity levels. Controlled environmental rooms have temperatures available between -30° C and +60° C, along with humidity as low as 5% relative humidity (RH) and up to 95% RH. Cleanrooms are specifically designed to maintain extremely low levels of airborne particles, contaminants, and pollutants with specified limits. They are primarily used in industries where even small particles or contaminants can adversely affect product quality, performance, or safety.