Article 1 1. 1.7 stipulates that the gas surge chamber, gas boiler room and oil pump room must be equipped with combustible gas concentration alarm signals (alarm if the parameters are too high).
1 1. 1.8 combustible gas alarm devices in gas surge chamber and gas boiler room shall be linked with the main cut-off valve of gas supply main pipe and exhaust fan.
There is no quantity requirement, only the gas surge chamber and gas boiler room are required to install combustible gas alarm devices.
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