Songkrathop sun protection blinds use a particular building, room with a glass window. So there are no air conditioning was too hard work and close the Curtains/blinds to the received sunlight directly.
Use curtains to prevent sunlight hits the building. The room with glass windows. Not to be overworked air conditioning and curtains / blinds on the receiving direct sunlight.
The curtain to prevent sunlight hits the building. The room with window glass. To prevent air conditioning work too hard and close the curtain / blind side has been the sun directly.