The vent-free design of Spark Modern Fires’ two-sided Vent Free Vu Thru fireplace gives builders and designers maximum flexibility when laying out a space instead of limiting them to spots that connect to the chimney or to an exterior wall. The 36-inch-wide model also can accommodate the company’s decorative objects, including rocks and glass, placed around the flame for a dynamic display that contrasts with the module’s interior black matte finish. Users can control the flames by choosing among six height settings. Spark Modern Fires, www.sparkfires.com; 866.938.3846.