When there is a fire do all the fire sprinkler heads go off at once?

No. Only the fire sprinkler head closest to the heat source will activate, don’t be fooled from what you see on TV. An incense stick waved under a sprinkler head will not generate enough heat to activate the system.

If you would like more information on how fire sprinkler heads work and what activates them please take a look at the guide below.

How fire sprinklers work 

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