Indoor Usage Requires a Top Tray (Purchased Seperately). EcoSmart Sale on Now! Compact and versatile modern fireplace burner. The ecosmart ab3 ethanol fireplace burner is the smallest of ecosmart’s round ethanol burners, but it is no less effective. It serves as the core of many freestanding, portable designer indoor and outdoor fires, providing both efficiency and versatility. The ab3 allows you to create your own unique fireplace designs, and the creative applications seen around the world are a testament to its adaptability and performance.
