There are two key words we should remember while installing heating radiators.
First, relatively lower installation position:
Hot air floats upward and the cold air sinks downward, if the hot air floats upward and the cold air sinks downward, so the radiator will be helpful to the circulation of heat.
The lower the radiator is installed, much more heat will be in the lower part of the room. The radiator installed on the windowsill can also be a decoration, that would be another good choice for customers who focus on the home interior design. 
Second,radiators in plate shape is better.
When it comes to the shapes of the radiator, plate ones can be better choice instead of the tube shape. Since the radiator are installed under the windowsill, so as to increase the utilization rate of the room much more easily, and also help hot air indoor to generate convection, maintain the balance of indoor temperature, heat the cold air infiltrated by the window in advance, and block most of the cold air from entering the room.