Safeheat 1500-watt portable radiator type heater has permanently sealed fins with pure diathermic oil that never needs refilling * Heats faster and lowest safer-to touch surface temperature than standard oil-filled radiators due to patented thermal slots * Uses up to 36% less wattage than conventional models due to its unique design and advanced technology * Silent operation is ideal for bedrooms and TV rooms * Automatically turns on when the room temperature drops below 44 degrees F with anti-freeze setting and automatically turns off with safety thermal cut-off if heater becomes too warm