Napoleon Oakdale EPI3TN-1EPI3TN 1 KEY FEATURES Up to 55,000 BTUs and heats up to 1,500 sq. ft. EPA certified to be one of the cleanest burning wood inserts available Largest ceramic glass viewing area in the industry, 300 sq. in. Full refractory lined firebox Airwash system keeps the viewing glass clean Rear rollers and oversized levelling screws make the EPI3T easy to install Removable painted black log retainer for easy cleaning Removable one piece high density vermiculite