Is security fog safe? Yes — it is certified safe for people, animals and goods, and it is the first thing worth establishing because the objection is usually what stalls the decision. The fluid is a food-grade glycol mixture. It leaves no residue. It is a certified product category tested to EN 50131-8, not an improvised deterrent.
The concern is reasonable, though. The word "fog" invites an association with smoke, and smoke in a building means something very specific and very dangerous. So it is worth being precise about the difference.
Fog is not smoke
Smoke is a product of combustion. It carries carbon monoxide, particulates and heat, and it is the leading cause of harm in a fire. None of that applies here. Security fog involves no combustion — a glycol-based fluid is vaporised across a heat exchanger and condenses in the air as a dense white cloud.
It is the same operating principle behind the fog machines used in theatres, concerts and nightclubs, where audiences are exposed to it for hours at a time. What differs is the speed and density: 28 m³ per second, reaching approximately 30 cm visibility, engineered to obscure a space in seconds rather than to create atmosphere.
People
The system is certified safe for people. It is non-toxic, it does not displace oxygen, and it does not chemically irritate the skin or eyes.
What it unambiguously does is reduce visibility — that is the entire function, and it applies to everyone in the space, not only to an intruder. This is a design consideration rather than a safety defect, and it is handled during specification: escape routes, emergency lighting and signage are part of the site survey, and systems are configured so that a person can leave.
Animals
Certified safe for animals. This comes up for premises with guard dogs, for veterinary and agricultural sites, and for residential installations where pets may be alone in the house. The same absence of combustion products and the same non-toxic fluid apply.
Stock, electronics and documents
This is where the practical worry usually sits, and the answer is the no-residue property. The fog disperses without leaving film, deposit or moisture damage on surfaces.
- Electronics
- No residue deposited. No cleaning of equipment required.
- Textiles and stock
- No film, no staining, no odour retention requiring treatment.
- Documents and paper
- No wetting damage; the fog is a suspension, not a spray.
- Surfaces and fittings
- No cleaning or specialist decontamination needed.
The consequence that matters commercially: an activation is not itself a loss event. If the system fires — including a false activation — you have not traded a theft for a remediation bill. The premises return to use once the fog clears.
Fire safety and evacuation
Two questions come up here and they deserve separate answers.
Will it trigger the fire alarm?
Security fog contains no combustion products, but some optical smoke detectors can respond to dense airborne particulate regardless of its origin. This is a known, solved design problem: detector type, siting and interlocking between the fog system and the fire panel are settled during specification. It is a site survey question, and a supplier who does not raise it has not thought about your building.
What about escape in an emergency?
Fog systems are configured around escape provision — protected volumes, emergency lighting and exit signage are part of the design, and local fire regulations govern the installation. Requirements differ across the markets we serve, so this is confirmed against the rules that apply to your building rather than to a general standard.
What certification actually covers
The safety position rests on independent testing rather than on manufacturer assurance.
- EN 50131-8
- The European standard specifically for security fog devices
- NF & A2P
- French certification for security equipment
- CNPP
- Independent testing and certification body
- ISO 9001
- Quality management systems
If you are specifying for a site with a compliance officer, get in touch early. Certification and safety documentation answer most of this in a form your insurer and your fire consultant will accept, and it is better to have it in hand before the specification is written than after.
Common questions
- Is security fog toxic?
- No. The fluid is a food-grade glycol mixture, certified safe for people, animals and goods. It involves no combustion and produces none of the carbon monoxide or particulates that make smoke dangerous.
- Does security fog damage electronics?
- No. It leaves no residue, so there is no film or deposit on equipment and no cleaning is required after an activation.
- Does security fog leave a smell or residue?
- It leaves no residue. The fog disperses on its own and the premises return to normal use without cleaning or specialist decontamination.
- Is security fog safe around pets?
- Yes — it is certified safe for animals as well as people, which is why it is used on sites with guard dogs and in residential installations.
- Can people still escape the building?
- Escape provision is part of the system design. Protected volumes, emergency lighting and exit signage are addressed during the site survey, and the installation follows the fire regulations applying to your building.