Fire Sprinkler Safety: At What Temperature Do They Go Off?

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  • Post last modified:December 23, 2022
  • Reading time:3 mins read

Fire sprinklers are designed to protect us from the dangers of fire and smoke. But how do they work? What temperature do they go off at?

Here, we will discuss the specifics of why fire sprinklers are triggered in order to keep us safe from potential fires.

At What Temperature Do Fire Sprinklers Go Off

On average, fire sprinklers are designed to activate at around 155 degrees Fahrenheit (69 Celsius). However, this is just an estimation as some sprinkler systems have adjustable temperatures based on the needs of the specific environment.

For example, a kitchen may need a higher temperature than a bedroom due to its increased risk of fire. That’s why many modern sprinkler systems have adjustable temperatures that can be set depending on the space it is installed in.

When it comes to actual activation, however, most sprinkler systems need a temperature of around 155°F for more than 30 seconds before they are triggered.

This allows time for someone to notice and call 911 before any real damage occurs and keeps false alarms to a minimum.

It is important to note that fire sprinklers are designed and tested for reliability, but even so, it is still important for homeowners or business owners to make sure their sprinkler systems are regularly inspected and maintained.

Regular maintenance can help ensure that your system will properly operate if needed.


Fire sprinklers can save lives when used correctly and consistently maintained. Knowing what temperature they go off at is essential information in case of an emergency situation that requires you or your family members to take action quickly.

On average, fire sprinklers are designed to activate with the heat of around 135 degrees Fahrenheit (58 Celsius), though this number can vary depending on the location and purpose of the space where it has been installed. Make sure you know how your home or business’s system works so you can be prepared in case of an emergency!