Classic Flame ClassicFlame 18 in SpectraFire Fireplace Insert & Flush Mount Conversion Kit - 18EF023GRA-BBKIT18 Energy Saving All LED Technology Requires no venting or gas lines Digital thermostat with numerical readout that disappears after setting Electronic timer function with automatic shut off from 30 minutes up to 9 hours 5 flame brightness settings with SpectraFire flame effect or traditional flame setting