First decide between a portable or mobile stored pressure unit and a large trolley type 250 litre system. The mobile water mist cum CAFS unit suits floor level, first response use in offices and schools. The 250 litre Water Mist cum CAFS system is built for large area coverage in hospitals, power plants, marine and offshore sites.
Next look at the fire risk mix. Water mist breaks water into very fine droplets, which cools fast and uses far less water than a jet, so it limits water damage to documents and equipment. AR-AFFF foam, which conforms to IS:4989 (Part-II), spreads a film over burning liquid and helps stop re-ignition, covering Class A and Class B risks.
Check certification against your audit requirement. The mobile unit is BIS approved to IS 15683:2006, ISI marked and CE certified. The 250 litre system is certified by a NABL accredited laboratory (AFTRL) to the latest EN parameters, with a 55A:233B-IVB fire rating performance and NABL testing for electrical conductivity in dry mode.
Finally plan for service. Both lines need periodic pressure checks, hose inspection and recharge. FPS handles installation, refilling and annual maintenance in Bhopal and across Madhya Pradesh, so confirm access, cylinder movement routes and a service schedule at the time of order.