Skip to content
Suppression

Fire sprinklers: how they work, and why they don't all go off at once

Correcting the most common misconception about sprinklers, and what drives network design.

Last reviewed: · 3 min read

Each sprinkler head operates independently when the heat around it reaches its rating. Usually only the heads near the fire activate — not every sprinkler in the building, as films suggest.

What drives the design?

  • Hazard classification by activity and materials
  • Ceiling height and storage method
  • Water source and available pressure
  • Obstructions such as ducts and racking

Any change in how a space is used can change the network's requirements, so we recommend a technical review when refurbishing or changing activity.

This content is general guidance and does not replace reviewing the official requirements that apply to your facility.

Next step

Let's review what your facility needs

Send your facility details in a few minutes. We review them and get back to you with the right scope — before any commitment.