Savemist Low-Pressure Water Mist Systems and Marine Fire Monitors
Savemist is a Polish manufacturer of low-pressure water mist fire-extinguishing systems for ships, based in Szczecin. Its range covers nozzles, pre-assembled pump skids and control equipment for machinery spaces, accommodation and vehicle spaces, and a Weather Water Monitor System for the weather decks of ro-ro passenger ships. SATU Innovative supplies Savemist low-pressure water mist systems and marine fire monitors in Thailand, and coordinates with Savemist’s engineering team on each project.
Water mist puts out a fire with a fraction of the water a sprinkler or deluge system needs. On a ship that matters twice over: there is less water to store and pump, and less water left on deck, where it affects stability and has to drain away. How the technology works, and how it compares with sprinkler and high-pressure systems, is on our low-pressure water mist page.
Why low-pressure water mist
A fire needs fuel, heat and oxygen. Water mist works on two of the three: it cools the flame and displaces oxygen locally, using far less water than a sprinkler.
Savemist’s own comparison of the three water-based technologies:
The reasoning behind both graphics, and the full comparison table, is on our low-pressure water mist page.
What Savemist supplies
Nozzles
Savemist nozzles stay closed when not in use, which keeps corrosive air out of the pipework, and have no protruding parts. There are separate nozzle types for local protection, full (total) protection, accommodation and car decks, with K-factors from 3.85 to 23 chosen to suit the application. Savemist states that its local application nozzle has been tested against methanol fires.
Pump skids
Pre-assembled low-pressure skids rated to 16 bar, built on Hilti-type profiles with a compact footprint. A skid can run as a standalone system or be integrated with other water mist systems on board. Low-pressure nozzles, pipe and fittings are standard marine components, which keeps installation, spares and maintenance simple.
Weather Water Monitor System
Fixed monitors for the weather decks of ro-ro passenger ships, developed for the 2026 IMO requirement, for both newbuildings and retrofits. Model data is below.
SAVEMIST IQ and retrofit engineering
SAVEMIST IQ is a management platform that brings several fire protection systems on board into one view, with alarms, source location and guidance for the operator.
For retrofits, Savemist works with Westone Design Poland on a complete engineering package: 3D laser scanning of the existing vessel, pipe routing, steel supports and foundations, installation and workshop drawings, and support through installation, commissioning and class approval.
Savemist in pictures
More illustrations from Savemist
Where Savemist systems are used on board
Every space on a ship has its own IMO approval guideline, and an approval in one space does not carry over to another.
| Protected space | Protection type | IMO approval guideline |
|---|---|---|
| Category A machinery spaces and cargo pump rooms | Total protection of the whole space | MSC/Circ.1165, as amended |
| Fire-hazard parts of engines, generators, boilers and purifiers inside a category A machinery space | Local application — protects the object, not the whole space | MSC.1/Circ.1387 |
| Enclosed vehicle, special category and ro-ro spaces | Fixed water-based system | MSC.1/Circ.1430 |
| Accommodation, public spaces and service spaces | Automatic water mist | Res. A.800(19), as amended by Res. MSC.265(84) |
One nozzle type for each duty
MSC.1/Circ.1387 · Image © Savemist
MSC/Circ.1165 · Image © Savemist
Res. A.800(19) / MSC.265(84) · Image © Savemist
MSC.1/Circ.1430 · Image © Savemist
- Accommodation and public spaces. In October 2026 Savemist completed IMO fire testing for accommodation and public spaces, at ceiling heights of 2.5 m and 5 m.
- Ceiling height. For full protection, Savemist’s limits are 11 m in large volumes and 5 m in small volumes.
- Electrical equipment. Savemist advises that IP44-rated electrical equipment is sufficient in spaces protected by its low-pressure system. High-pressure mist has a greater water-damage impact on electrical equipment.
- Certificates. An approval covers one space type and the nozzle model, spacing, height and pressure that were tested. Ask us for the certificate that matches your space before it goes into a specification.
- Open weather decks are not a water mist duty. The regulation calls for monitors, covered below.
Ro-ro passenger ship weather decks: the Savemist Weather Water Monitor System
IMO Resolutions MSC.550(108) and MSC.555(108), adopted on 23 May 2024 and in force from 1 January 2026, require a fixed water-based fire-extinguishing system on the weather decks of ro-ro passenger ships where vehicles are carried. The operative text is SOLAS regulation II-2/20.6.2 and the new section 2.5 of chapter 7 of the FSS Code.
Ships constructed on or after 1 January 2026 must meet the full FSS Code 7/2.5 specification. Total monitor capacity must be at least 2.0 L/min per m² of protected area, and each monitor must deliver at least 1,250 L/min. The coverage distance may not exceed 75 % of a monitor’s throw distance in still air. Nozzles delivering 5.0 L/min per m² are required for any area the monitors cannot reach, and the monitors must reach adjacent superstructure boundaries within 8.0 m. Existing ships fall under the lighter regulation II-2/20.6.2.3, and must comply by the first survey on or after 1 January 2028.
The regulation specifies monitors and their performance. It does not require water mist. Savemist developed its Weather Water Monitor System for this requirement. Monitors can be supplied from the ship’s fire main, from the pumps of another fixed fire-fighting system, or from a dedicated seawater pump, and they can be operated manually or remotely.
| Manually operated monitor | SVM-80M | SVM-100M | SVM-150M |
|---|---|---|---|
| Maximum flow | 3,800 L/min | 6,500 L/min | 13,000 L/min |
| Minimum flow | 500 L/min | 1,000 L/min | 2,000 L/min |
| Design pressure | 4–16 bar, optimum 10–12 bar | 4–16 bar, optimum 10–12 bar | 4–16 bar, optimum 10–12 bar |
| Rotation | 360° | 360° | 360° |
| Weight | 21 kg | 32 kg | 61 kg |
| Working temperature | −35 °C to +120 °C | −35 °C to +120 °C | −35 °C to +120 °C |
Electrically operated versions are also available. Monitor spacing is set by throw distance: for new ships, FSS Code 7/2.5 limits coverage to 75 % of the still-air throw distance, so throw distance, not flow rate, decides how many monitors a deck needs. We confirm throw data with Savemist for each project.
For the full reading of the requirement, with a worked example and a TOR checklist, see Fire systems on Ro-Ro passenger ship weather decks carrying vehicles: the 2026 IMO requirement and how to write the TOR.
What we do not claim
- We do not say the weather-deck requirement calls for, prefers, or is best met by water mist. The regulation specifies monitors.
- We do not quote approvals, throw distances or test results that the manufacturer has not provided to us in writing.
- SATU Innovative supplies Savemist systems. We are not Savemist’s distributor, agent or representative.
Related reading
- Low-pressure water mist fire protection: how it works and how it compares
- Fire systems on Ro-Ro passenger ship weather decks carrying vehicles
- Water mist fire suppression for shipboard machinery spaces and enclosed areas
Send us your project
For a weather-deck project, please send us:
- the ship type and keel-laying date;
- the length and width of the vehicle deck, and the height of the adjacent superstructure;
- the capacity and pressure of the fire main;
- whether this is a newbuild or a retrofit.
For a machinery-space or accommodation project, please send the space volumes and ceiling heights, the equipment to be protected and the class society. Contact SATU Innovative.
Illustrations on this page are supplied by Savemist. Header photo: stock image of a ship engine room.