Research And Insight

Fire hazard classification

When designing a fire sprinkler system, the hazard class (LH, OH, HH) determine the characteristics of the fire sprinkler installation for the specification of water supply, number of fire pumps, number of sprinklers, and so on.

The hazard class to which the sprinkler system is to be designed shall be determined before starting the design work. The classifications Light hazard (LH) Ordinary Hazard (OH) and High Hazard (HH) depends on the occupancy.

Buildings can contain one or more of the following hazard classes:

Light Hazard (LH)

Covers Non-industrial buildings with low fire load

Ordinary Hazard (OH)

Covers trading and industrial buildings with medium fire loads

High Hazard Processing (HHP)

Covers industrial buildings where materials processed have a high fire load and are capable of a quickly spreading or intense fire

High Hazard Storage (HHS)

Covers industrial buildings where materials stored have a high fire load and are capable of a quickly spreading or intense fire

Grundfos supplies fire pumps to fire sprinkler systems pumps in accordance with the fire hazard classification for industrial and commercial fire protection.

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