The DRL4543 has a 43 opening and comes with clear, smooth glass pebbles. Dancing yellow flames are amplified against the glossy black porcelain coated interior walls. Illuminate without the flame using bottom accent lighting. Operate the electronic ignition system with the included deluxe remote control. Customize your unit with glass pebbles in several attractive colors. All units are equipped with a standard barrier that meets 2015 requirements. The DRL4543 direct vent gas fireplace is a versatile linear design for a dramatic appearance. Standard features include ceramic glass and in-floor lighting to illuminate a variety of colorful glass pebbles. The large viewing area provides an uninterrupted display of the active flame pattern. Available in indoor or indoor outdoor see through configurations, the DRL4543 provides endless possibilities for any modern living area.43 Front open linear configuration See through conversion kits available to transform the fireplace into a see through model or indoor outdoor see through model Gas controls are conveniently hidden in the fireplace floor Electronic ignition with battery backup to operate in the event of a power outage Active, dancing flames help to accentuate the ambiance in any room Seven flame settings for precise heat control Clean-face design features ceramic glass for optimum heat transfer and 2015 ansi barrier compliant Three-piece black porcelain interior liners Mood enhancing fireplace interior lighting, with six distinctive illumination settings Optional decorative face trim in three designer options Deluxe remote control (flame, lighting, ipi cpi) Now uses ihp sv4.5 vent pipe 20 Year limited warrantyBTU: 22,000 - 35,000 Controls: Remote Control Framing Depth: 17-1 2, 15-1 4 (See Through) Framing Height: 38 Framing Width: 53-1 4 Rating: ANSI Z21.50 Venting Type: Direct Vent View Style: Optional See Through Weight: 296