NAF® S 125

NAF® S 125 is a UL Recognized and US EPA SNAP Listed gaseous extinguishing agent. NAF® S 125 Engineered Systems are UL Listed.

NAF® S 125 is suitable for use in rooms, vaults, enclosed machines, containers, storage areas and wherever fixed enclosures are present. It is an electrically non-conductive media, it can therefore be used to protect electronic and delicate equipment. After discharge NAF® S 125 does not require the clean-up of the protected enclosure, making it extremely useful in applications where damage by other extinguishing methods would be prohibitive.

NAF® S 125 has a low order of toxicity. At typical design concentrations it can be safely used to protect normally occupied areas.

The NAF® S 125 formulation includes a patented additive that reduces the levels of decomposition by-products normally generated by halocarbons during extinguishment and enhances extinguishing performance (inter alia US Patent No. 6,402,975 and EU Patent No. 630,278).

By weight NAF® S 125 requires the lowest concentration, making NAF® S 125 the most cost effective clean agent solution available in the market today.

Physical Properties 



Composition HFC-125 + 0.15% of Limonene
Molecular weight  120.0
Boiling point @ 1.013 bar -48.3°C  
Density of the liquid @ 25°C 1189.7 kg/m³
Critical temperature 339.45 K
Critical pressure 3595 Kpa
Vapor pressure @ 20°C 12.09 bar 
Relative electrical resistance @ 1 atm. 21°C (N2=1.0) 0.955 
NFPA 2001 Edition 2012  
Design concentration for Class A Fires 8.7% (by volume)
Flooding factor for Class A Fires 0.484 kg/m³
Design concentration for Class C Fires 9% (by volume)
Flooding factor for Class C Fires 0.502 kg/m³
ISO 14520 Edition 2006  
Design concentration for Class A/C Fires 8.7% (by volume)
Flooding factor for Class A/C Fires 0.484 kg/m³
PBPK (5 minutes exposure)  11.5% 
Ozone Depletion Potential (ODP) 0
Global Warming potential (GWP) 2800