At 99.9 percent efficiency, the Vent-Free Vail Fireplace delivers more heat for your energy dollars – 32,000 Btu for the Vail 32 and 36,000 Btu for the Vail 36. Ceramic glazed pellets in the burner tumble and swirl the gas to produce a natural flickering flame. Choose one of two available log sets – Ceramic Fiber or Refractory. Both are hand painted for exceptional realism and exquisite detail. Choose one of five liners – aged brick, stacked limestone, traditional, banded brick, or black porcelain.