Infratech 21-4990BL 29 1/2" SL-Series Slimline Black Infrared Heater 1600W 120V - With crisp, modern styling, an anodized aluminum housing and narrow profiles, Slimline heaters virtually disappear into the surrounding décor. Our low profile heaters are suitable for outdoor installations and offer a pleasing, streamlined look due to low clearance requirements. SL-Series heaters are ideal for wall or ceiling mount applications.