Duraflame DFI021ARU-03 Electric Log Set Heater with Realistic Ember Bed, Nickel 4,600 BTU heater provides supplemental zone heating for up to 400 square feet Rolling, pulsating, realistic log set and ember bed projects flames onto the back of an existing fireplace Flame effect can be operated with or without heat, providing the ambiance of a gentle rolling fire all year long Portable unit comes fully assembled and ready to heat and requires no venting or gas lines. Includes an owners manual and easy-to-follow instructions. Safe for kids and pets - stays cool to the touch