An indoor-outdoor fireplace apparatus including having a base unit which supports a pair of spaced elongate containers for a fuel of the liquid or gel type. In key embodiments, the two elongate fuel containers each have a short horizontal dimension. A shutter carrier slidably rests on the base-unit top and includes a frame to which a pair of elongate shutter plates are secured in spaced positions to cover the elongate fuel containers, such arrangement providing a visually-broad flame field with full on-and-off and adjustment control with a short shutter stroke.