Duraflame Portable Heater. Provide soothing warmth to any room in the home with this 4,600 BTU ceramic tower heater. It provides supplemental zone heating for up to 400 square feet. This unit offers high efficiency heat with two heat settings and adjustable temperature control. The louvers oscillate 90 degrees for quick and even distribution of warmth. Use this heater with confidence since it features tip-over switch protection which will turn off the heat if it’s accidentally gets knocked down. A handsome sleek design rounds out this amazing heater. Grey.