My whole life I've been using oil heaters until I discovered Delonghi convection heater. The best part is that it can be attached to the wall and looks like it's built in. It also comes with wide legs to prevent it from turning over or falling.
Some of the areas in our house don't heat evenly so in the winter time we use additional heaters to keep warm. This heater is wonderful. It's quiet even on the highest setting. There is three settings. 
There is also an energy saving option which regulates the temperature to use less electricity.  The battery also has a timer. 
Great battery