The Napoleon Ascent Linear is a direct vent gas fireplace using natural gas or propane, featuring a linear design and CRYSTALINE ember bed for a modern flame presentation. The Ascent Linear Series brings a streamlined look to modern interiors with multiple size options and flexible design configurations. Its linear format creates a wide viewing area, making it ideal for feature walls and open living spaces. The included CRYSTALINE ember bed with topaz crushed glass enhances the visual effect of the flame while maintaining a clean, contemporary aesthetic. This fireplace supports multiple media options, including Beach Fire, Shore Fire, and Mineral Rock kits, allowing you to tailor the appearance to your design preferences. Additional decorative panels, surrounds, and finishes provide further flexibility, making it easy to integrate into a wide range of interior styles. The Napoleon Ascent Linear is designed for built-in installation using a direct vent system. It can be vented horizontally through an exterior wall or vertically through the roof, depending on your layout. Included non-combustible material simplifies installation and helps support safe finishing around the fireplace opening. The Ascent Linear features electronic ignition for reliable startup and operation. The CRYSTALINE ember bed with topaz crushed glass provides a consistent visual glow beneath the flame. Optional eFIRE control enables remote operation and added convenience when paired with compatible systems. WARNING: This product can expose you to chemicals including lead and lead compounds, which are 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.