What is a necessary feature for natural gas and propane fireplaces?

A pilot light is a necessary feature for natural gas and propane fireplaces because it serves as a small, continuously burning flame that ignites the main burner when the fireplace is turned on. This ensures a quick and safe ignition process, allowing for immediate use of the fireplace. The pilot light's presence is crucial for safety since it reduces the risk of gas accumulation, which could lead to dangerous situations if the main burner does not ignite properly.

While other features like thermostat control, remote ignition, and flame sensors enhance the operation and functionality of these fireplaces, the pilot light is fundamentally necessary for their safe and effective use. Thermostat control and remote ignition can improve convenience and comfort, while flame sensors are important for safety by ensuring that the flame is maintained. However, without a pilot light, the fireplace would not function correctly.