How water mist works
Water mist removes heat from a fire by discharging fine water droplets. In an automatically activated system, smoke detection raises the fire alarm, and the fire alarm panel then sends a signal to trigger the suppression system. This type of system is not another name for FM200 or fire gas. Water mist uses water, while gas-based systems use a different extinguishing agent.
Where water mist is used
It is used in places where a fire can cause major damage or financial loss. The system must suit the fire risk and the equipment in the protected area:
- Data centres
- UPS rooms
- Marine settings
- Industrial sites
Which fires the system suits
It is primarily used for Class A fires, which involve solids such as paper, wood and plastics. Any proposed use on electrical equipment or other classes needs checking against the specific system's suitability, rather than assuming every system can handle it. We confirm this with the system's data sheet and your risk before we quote.
Benefits of water mist
It has three advantages that matter to buyers:
- It cools the fire
- It leaves no chemical extinguishing-agent residue
- It does not deplete the ozone layer
Is water mist right for you?
Safe operation depends on selecting and installing a system suited to the site. Compare it with the alternatives before you decide. A fire sprinkler system suits most buildings and uses more water. A gas system, described on our fire gas page, puts out a fire without water. It sits between them, and we advise on the fit room by room.
Check the cost and the claims
Some suppliers claim the system is cheaper than a sprinkler system, or that it controls a fire in under 10 seconds. Neither should be taken as true for every site. The cost depends on the proposed installation, and the control time depends on the selected system and the fire risk. We give both in writing for your site, and we do not promise a universal fire-control time.
What you get from Essatech
We supply, install and service these systems in Hyderabad and Visakhapatnam. The job covers:
- A site visit to review the room, equipment and fire risk
- Selection of a system that suits the hazard
- Supply and installation, linked to your fire alarm panel
- Testing and handover, and service visits afterwards
Testing and upkeep
This kind of system needs regular attention to stay ready. At each service visit we check the water supply and pressure, the nozzles for blockage, the detection and the signal to the alarm panel, and we run the checks the manufacturer sets for that system. Mist nozzles have fine openings, so scale and debris in the water matter more than they do in a sprinkler. Any change to the room, such as new equipment or partitions, is reviewed against the original design.
For builders, architects, MEP consultants, corporates, industries, hospitals and defence
Builders and architects planning data rooms or control rooms should consider water mist when a gas system is not suitable, and bring us in before walls and ceilings are fixed. Industries with UPS and switch rooms, commercial building owners with server rooms, and hospital owners with plant and UPS rooms should check the system against the hazard first, because mist suits some risks and not others. MEP consultants can send the room and hazard details and we check water mist against the specification. Corporates use it in UPS and server areas where suitable. Defence establishments, including Navy and Army control and communication rooms, can ask us to review it against their risk, and we quote within their vendor rules.
What decides the cost
A quote depends on:
- The size of the protected area and the hazard
- The system type and the water supply
- Detection and links to the alarm panel
- Installation effort in your building
What to send us for a quote
Share these through the quote page or on WhatsApp:
- Room dimensions and ceiling height
- What is inside and how it is used
- Existing alarm panel and detectors, if any
- Your location and the date you need the work done
Local service in Hyderabad and Visakhapatnam
We work with data centres and offices in Gachibowli, Hitech City and Madhapur, and with marine and industrial sites around Visakhapatnam. Contact our offices to discuss your site.
Talk to our local team
Share your location, type of building and what you need. We will suggest the right equipment and explain installation and maintenance.


