We offer Vent-Free Inserts in two sizes (20,000 BTUs and 28,000 BTUs) and in two styles (traditional and contemporary) – so you are sure to find one to fit your existing wood-burning fireplace. A 10,000 BTUs contemporary system is available for bedroom applications – where allowed by codes. Innsbrook Vent-Free inserts feature Banded Brick Liners, with hand-painted ceramic fiber logs on a variableflame burner. The unique Slope Glaze Burner produces natural flickering flames. The Loft Series Vent-Free Insert features a contemporary linear burner in a sleek, black firebox that reflects the flames to create depth and visual interest. A fine mesh barrier screen comes standard with all models.