DeLonghi TRVO715 Vento Hi-Speed Convection Oil-Filled Radiator Heater Provides fast and flexible heating whether in the bedroom, living room or office. Produces hotter air than a standard oil-filled radiator with its unique design. It allows heated air to rise faster and gain speed. Wheels snap easily into place with patented pre-assembled wheels. No tools required. Never needs refilling. Unit is permanently sealed with pure diathermic oil for stable and efficient heating. Customize your heating needs with the adjustable thermostat and three heat settings.