Whether looking at gas fireplaces, gas logs, gas inserts, or freestanding gas stoves, you will most likely come across the terms- Millivolt and Intermittent Pilot (also commonly referred to as electronic ignition). These are two different ignition systems gas appliance manufacturers use to light the burner of the appliance. They also include safety features so that you can feel safe in knowing that in the rare chance that something malfunctions, the unit will shut down before anything negative can happen.
All safety tested gas appliances use a series of switches, sensors, valves etc. to both ignite the fire as well as provide a safety system in case a part fails. There are two common types of ignition systems used in the fireplace and outdoor industries. Standing Pilot Millivolt Ignition systems and Intermittent Pilot Ignition Systems. There are variations of both of these systems from different manufacturers but the information below will lay out how each works and keeps you safe.