This is in the case that you choose to have an operable skylight installed instead of a fixed skylight. Operable skylights have the option to be opened or closed at will, with some allowing for at least 6 -12 inches of opening. There are also operable skylights which can be opened up to a 90 degree angle, which provides better air flow in to the property.
Operable skylights allows for the warm air inside the property to rise up and escape through the skylight’s opening, and at the same allows for the cool, light breeze to enter. With these types of skylights, you can reduce the need for cooling systems or air conditioning, and thus be able to help you save more on your electricity bills while providing a breath of fresh air for the residents of the property.