According to the DIN 5034-1 norm rooms should be protected from overheating with the use of external accessories (awning blind, roller blind) which give better protection than internal accessories.
The investigation results above show clearly that external accessories (awning blind and roller shutter) provide the best protection from outside heat. The optimum sun protection can be acquired be external awning blind, bearing in mind heat protection and ease of installation. Internal accessories also offer protection from the heat but to a lesser degree than external accessories; their main function is to decorate the space and regulate the amount of light entering the room.
