The Superior DRT4000 Series Direct Vent Gas Fireplace is an indoor liquid propane or natural gas fireplace designed for direct vent installation, featuring electronic ignition and a spacious 21-inch deep firebox. Available in 40" and 45" models, the DRT4000 Series offers a full-size 21" depth that creates a larger fireplace interior and more expansive log arrangement. High-definition ceramic fiber logs rest on a heavy-duty grate, delivering a detailed and balanced flame presentation. A required façade selection includes either a Vista inside fit or a decorative overlap fit option, each equipped with a protective screen barrier. The black painted interior enhances flame contrast, with optional liners available for further customization. Electronic IPI/CPI ignition comes standard and includes seamless battery backup to support operation during power interruptions. A top flue configuration supports direct vent installation, while tempered glass provides a clear view of the fire. The DRT4000 Series is designed to offer strong heating efficiency and lower operating costs when properly installed and sized for your space. Optional blower kits and remote control kits are available to enhance comfort and control. The DRT4000 Series uses a top flue configuration for direct vent installation. As a sealed combustion system, it draws air from outside the home and vents exhaust outdoors, helping maintain indoor air quality. With its full-size 21" depth, the unit provides a larger interior presence compared to mid-depth models. Professional installation is recommended to ensure proper gas connection, venting, and compliance with local building codes and manufacturer guidelines. This series includes electronic ignition with a standard IPI/CPI switch and integrated battery backup. The system is designed to provide reliable startup and continued operation during power outages when battery backup is in place. Standard features include tempered glass, a high-definition ceramic fiber log set, a heavy-duty grate, black painted interior, and a durable textured powder-coat finish. Optional blower kits and touch or hand-held remote control kits can be added for enhanced convenience and airflow management. Customize your DRT4000 Series fireplace with these optional accessories. Afacadeis required for every installation to complete the fireplace look. Additional options includeliner kitsto change the interior finish, surrounds for a finished appearance, blower kits to improve heat circulation, remote control kits or wall switches for easy operation, decorative media to enhance the flame presentation, and a conversion kit to switch between natural gas and propane for added flexibility. WARNING: This product can expose you to chemicals including carbon black, which is known to the State of California to cause cancer, and carbon monoxide, which is known to the State of California to cause birth defects or other reproductive harm. For more information, go towww.P65Warnings.ca.gov.