Yes, bug foggers (also known as insect foggers or “bug bombs”) can potentially set off sprinkler systems, especially if they are heat-sensitive sprinklers. While the fog itself doesn’t pose a fire risk, the heat released by the fogger’s aerosol can sometimes raise the temperature near the sprinkler heads, triggering them.
How Sprinklers Work
- Heat-Activated Sprinklers: Most sprinklers are activated by heat, not smoke or fog. They have a glass bulb filled with liquid that bursts when it reaches a certain temperature, usually around 135–165°F (57–74°C). If the heat from the fogger aerosol or the fog itself raises the temperature near the sprinkler head, it could cause the system to activate.
- Photoelectric (Smoke) Detectors: If your building is equipped with a smoke detection system linked to sprinklers, bug foggers might trigger the alarm because the particles released by the fogger can resemble smoke to the detectors.
Why Bug Foggers Can Be a Problem
- Heat from the Aerosol: Bug foggers use aerosol propellants, which can get warm when released in confined spaces. If the fogger is too close to a sprinkler head, the heat from the aerosol could cause the sprinkler system to engage.
- Particle Sensitivity: Some smoke detectors can mistake the dense fog released by a bug fogger for smoke, especially if the space is small and poorly ventilated. This could trigger an alarm that might cause a sprinkler system to activate.
How to Avoid Setting Off Sprinklers with Bug Foggers
- Turn Off or Block Sprinklers Temporarily: If you’re using a fogger in a space with sprinklers, consider asking the building management if the sprinkler system can be temporarily deactivated in the fogging area. Be cautious with this, and ensure it’s safe and compliant with local fire safety regulations.
- Use the Fogger Away from Sprinkler Heads: Place the bug fogger as far away from sprinkler heads as possible to reduce the chance of heat triggering the system. Keep the fogger in the center of the room rather than near the walls or ceilings, where sprinkler heads are usually located.
- Ventilate the Area: Make sure the area is well-ventilated. This can help disperse the fog more quickly and prevent the fog particles from accumulating near detectors or sprinklers.
- Follow Manufacturer Instructions: Always read the instructions on the bug fogger to ensure proper placement and usage, especially in spaces with sensitive fire safety equipment.
Conclusion
While bug foggers don’t typically set off sprinklers directly, they can activate heat-sensitive sprinklers or smoke detectors if used improperly. To avoid accidentally triggering the system, place the fogger away from sprinkler heads, ensure good ventilation, and, if possible, consult building management to temporarily deactivate sensitive systems during the fogging process.