Patented CLIP-N-FIT feature allows installer to change the desired wattage output without moving the jumper wire Dual Protection: self-hold limit with one-time thermal fuse Dual voltage and wattage ratings help reduce inventory levels Contemporary look and compact size ideal for new residential or commercial installations where space is limited Quick installation and easy service with heater/fan assembly fitting into back box with a single screw Double-pole thermostat on all models Efficient quiet operation from smooth running multi-layer impeller Adaptable for retrofits (such as provided with UL-approved COS-E and CS Models)* Thermostat with positive OFF position for added safety