Sprinkler heads cannot false alarm. The only way they can operate is when the air around them reaches the predetermined temperature. They will not respond to smoke, dust or fumes from aerosol sprays. It is true however, that a few heads each year operate after vandalism or accidental damage, for example, struck by the masts of fork lift trucks. Consideration to such environmental factors is typically taken into consideration when sprinkler systems are being both designed and installed. Measures such as protective guards or the use of concealed sprinkler heads can be adopted.