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Environmental Classification for Intruder Alarms

The environmental classification indicates the conditions most likely to prevail in the premises in which the security system is installed.

Class I - Indoor

For use in residential or commercial properties where the temperature is well maintained.

Class II - Indoor: General

For use in corridors, halls or staircases, and where condensation can occur on windows, as well as in unheated storage areas or warehouses where the heating is not well maintained or is intermittent. 

Class III - Outdoor: Sheltered

For use out of doors where the system components are not fully exposed to the weather.

Class IV - Outdoor: General

For use out of doors where the system components are fully exposed to the weather.