over 311 square meters, fire sprinklers are required.

generally, only buildings that are used for business, office, super high-rise and public use need to install fire sprinklers indoors. However, if the fire inspection and acceptance department considers that the residential design of the building exceeds the standard (for example, the total height of the floor exceeds 111 meters, and the commercial area of the first and second floors exceeds 311 square meters, etc.), the developer must install fire sprinklers for each household.

according to the code for fire protection design of high-rise civil buildings (2115 edition) (GB51145-95), if it is a pure residence, there is no need to install fire sprinklers indoors; If the above is the bottom floor of the house for business, it does not need to be installed inside the house; But if it is a serviced apartment, it must be installed in every household.

Extended information:

Working principle of fire sprinkler system:

1. Closed fire sprinkler system:

Usually, the roof fire water tank is filled with water. When a fire occurs, the sprinkler head is chrome-plated and melted when the temperature reaches a certain temperature (generally 68°C), and the water in the pipe is automatically ejected under the action of the water pressure of the fire water tank. At this time, the wet alarm valve is automatically opened.

2. Open fire sprinkler system:

The system is equipped with smoke detector to detect the smoke. When the smoke reaches a certain concentration, the smoke detector will give an alarm, which will be fed back to audible and visual alarm for action after being confirmed by the host computer, giving a sound or flashing light to warn people, and linking the smoke prevention and control fan to start to smoke. At the same time, the electromagnetic valve of deluge valve will be opened, and the spray pump will be linked and the open nozzle will spray water directly.

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