Delonghi TRD40820TDragon 4 provides steady silent heat. Ideal for longer term use as the diathermic oil releases heat gradually. Fitted with pre-assembled Easy Wheels for transportation. De'Longhi technology design and reliablity provides peace of mind and long lasting effective comfort.New Heat Cell Design with enlarged heat fin shape increases the chimney effect for accelerated hot air delivery resulting in a more rapid heating of your room.Patented pre-assembled castors for easy and practical movement around the home.