Rechner
Sprinkler count for rectangular room
EN 12845 / NFPA 13
Pump head — static + friction + residual
EN 12845 §10 / NFPA 20
Water tank volume from density × area × duration
EN 12845 / NFPA 13
Hazen-Williams pipe sizing (friction loss)
NFPA 13 §28
ESFR storage clearance checker
NFPA 13 §23
Pipe velocity check (mains & branches)
NFPA 13 / EN 12845
Antifreeze loop volume
NFPA 13 §7.6
Hydrant residual pressure projection
NFPA 291
K-factor → flow at pressure
EN 12845 / NFPA 13
Sprinkler discharge — total flow from N heads
EN 12845 / NFPA 13
Riser sizing by demand
NFPA 13
Pre-action / dry system air pressure
NFPA 13 §7.2.6
Deluge nozzle count for EV parking row
FM DS 5-33 / NFPA 88A guidance
Water mist — droplet rule of thumb
NFPA 750 / EN 14972
Foam concentrate volume
NFPA 11 / EN 13565-2
CO₂ total-flood quantity
NFPA 12 / ISO 6183
Smoke vent area (EN 12101-2)
EN 12101-2
Fire pump diesel fuel tank sizing
NFPA 20 §11.4