Design parameters
| Standard | EN 12845 |
| Hazard class | OH1 (Ordinary Hazard Group 1) |
| Design density | 5.0 mm/min |
| Area of operation | 72 m² (wet) |
Design notes
- Concealed pendent heads in guest rooms for aesthetics
- Sidewall heads above bed lines where ceiling penetration is limited
- Risers in service shafts with floor-level isolation valves
- Coordinate with smoke control / pressurisation system
Typical equipment
- QR pendent K80 sprinklers
- Recessed concealed heads
- DN100 wet alarm valve
- Single electric pump
How FireTwin AI handles hotel projects
Upload your floor plan or model the building footprint directly. FireTwin AI classifies rooms, applies the EN 12845 OH1 (Ordinary Hazard Group 1) grid, runs the hydraulic calculation from the most remote area back to the pump, and produces a priced BOM — all re-verified on every edit.