From its stunning, unobstructed view, to the high-efficiency heating that only comes from advanced engineering, the DRT3500 Pro Series direct-vent gas fireplace offers the ultimate in style and performance. Standard features, like ceramic glass and a built-in blower, keep living areas warm and inviting, while optional accessories bring added style to any room. As versatile as it is efficient, the DRT3500 Pro Series is the choice for affordable comfort without compromise. Aesthetics Select from 3 sizes - 35", 40" and 45" - to accommodate the size of your room and heating needs. Aged Oak logs, decorative grate and glowing embers deliver an elegant fire presentation. A newly designed pan burner produces brilliant flames for a vibrant presentation and hours of enjoyment. Ceramic glass for superior clarity. Clean, radiant design blend with any style of mantel or trim. Standard interior illumination. Comfort Heat-circulating design increases warm air distribution for exceptional supplemental heat. Standard built-in blower kit enables higher efficiency and heat delivery to the living space. Ceramic glass provides more radiant heat than standard tempered glass. Framing Dimensions: 35" - 35.5"W x 36.25"H x 18"D (20,000 BTUs) 40" - 40.5"W x 41.25"H x 18"D (24,000 BTUs) 45" - 45.5"W x 41.25"H x 18"D (28,000 BTUs)