Why would someone install skylight in their home? Skylights may be installed for light, ventilation, or balcony access. Possibly, there is no other way to get light into the room. Some people also like...
Possibly, there is no other way to get light into the room. Some people also like ventilation through the roof for maybe an attic space that has been turned into a bedroom where you are limited due to the pitch of the roof for head space and ventilation. There are many different types of fixed or window skylights, and some that actually open up into a balcony or something like that. It gives you a lot of additional space and ventilation.
As for energy efficiency, the more efficient your skylight is, the less heat and cool that you are going to lose through transfer through the glass. The U-factor is very important whether it's a window, a door, or a skylight. That is where the Low-E glass actually comes in and helps to reflect a lot of heat, but still allows the light to come in. For heating and cooling, the lower the U-factor is in a hot area, the more efficient it is and the less transfer you have.
