Automatic Igniter

The Automatic Igniter is a machine added by GregTech 6 that automatically ignites Burning Boxes and starts fires.

The Automatic Igniter is powered by electricity or EU.

Usage
If a Burning Box containing fuel is placed in front of the Igniter, it will be ignited. Otherwise, if there is air in front of the Igniter and the surrounding blocks would allow a fire to start, a fire will be started. By default, the Igniter is always active; the Redstone Machine Switch cover may be used to only activate the igniter on Redstone signals.

Behavior
Igniters behave as if they had a small EU buffer inside them, and they check if they can emit a fire every 10 ticks. They can ignite blocks as long as their internal buffer contains at least 1 EU regardless of tiers. Upon emitting a fire their internal buffer becomes empty, and they sleep for 100 ticks (5 seconds). This means you don't need to supply them a constant stream of EU with their recommended input voltage (e.g. 16 EU/t for LV igniters). The actual voltage can be lower than that as long as it is no less than the minimum input voltage (e.g. 8 EU/t for LV).

While there are several tiers of igniters in the game, their ability of emitting fire has apparently no differences among tiers. The tooltip mentions their "tool quality" but it seems to be unused at least for now. However, this doesn't mean higher tier igniters are useless, because higher voltage means less energy transfer loss.