What describes a gas interlock system in commercial kitchens?

A gas interlock system in commercial kitchens is designed primarily for safety by ensuring that the gas supply is automatically shut off if the ventilation systems fail. This is crucial since adequate ventilation is necessary to safely combust gas appliances. If the ventilation is compromised—resulting in potentially dangerous gas build-up—the interlock system reacts by cutting off the gas supply, preventing accidents such as gas leaks or explosions due to improper venting.

This feature makes the interlock system an essential safety mechanism, particularly in environments where cooking is happening continuously and where the risk of gas accumulation is a concern. The other options do not correctly capture the primary function of a gas interlock system: keeping the gas supply on at all times, regulating gas pressure for cooking, or operating independently from ventilation systems would not provide the necessary safety measures that the interlock system is specifically intended to enforce.