The respirator must be completely dry before storage. Dirty respirators can cause dermatitis. OSHA regulations require that respirators be stored in a clean and sanitary condition. Excessive heat will deform the respirator and prevent it from having a good face to mask seal. Excessive heat will deform the respirator and prevent it from having a good face to mask seal.
Excessive cold can cause cracks in the facepiece causing leaks.
High humidity areas. Extremely humid conditions will make it difficult to maintain a good mask to face seal. Toxic chemicals can cause dermatitis or facial burns. Store the respirator in such a manner as to prevent the facepiece from being deformed. Do not hang the respirator from the straps.