VRT6036 models feature the mosaic masonry system using real firebrick available in Warm Red or Ivory. This fireplace features a 30 tall opening with firebrick extending to the front edge. Standard barometric dampers are factory installed on both sides allowing for two AK4 fresh air kits recommended for maximum performance.99.9% Heating efficiency when paired with a vent-free gas log set Fully insulated firebox for increased performance in colder climates Mosaic Masonry brick available in a variety of patterns and colors Includes mesh fire screens Dual (left hand right hand) outside air kits available for maximum performance Durable textured powder coat finish Compatible with any listed ANSI Z21.11.2 vent-free log set Choose a beautiful and reliable Superior vent-free log set for best results 20 Year limited warrantyBTU: Based on Vent-Free Logs Installed Controls: Optional Remote Framing Depth: 30-1 8 Framing Height: 54-5 8 Framing Width: 51-3 8 Rating: ANSI Z21.91-2007 Style: Traditional Venting Type: Vent-Free View Style: Front View Weight: 586