Ambiance’s wall-mounted fireplace uses liquid bioethanol fuel that burns cleanly and does not need a chimney. Able to heat a 450-square-foot space, the fireplace emits 9,800 BTUs and burns for four and one-half to six hours on a full tank. It measures 44 inches wide and comes in three colors. Cost: $2,069. Decoflame. 310-436-6122.