Home
EN 12845

Ordinary Hazard Group 3 (OH3)

EN 12845 classification covering retail sales floors, light manufacturing, garages, paper handling.

Definition

OH3 retains the 5.0 mm/min density at an area of operation of 216 m². Mixed-use retail schemes typically pin the design at OH3 because of stockroom commodities even though the sales floor would qualify for OH2.

Referenced in

  • EN 12845

Design it in FireTwin AI

Generate a compliant sprinkler layout, run the hydraulic calculation and export a priced bill of materials — checked against EN 12845 and NFPA 13.

Related