Roof windows or skylights are the most effective source of sunlight and ventilation, allowing abundant daylight and fresh air to enter the room, thus, ensuring less use of the artificial lights. This leads to better energy efficiency during the day, and reduced environmental and financial costs. Catering to the diverse demands of people, there are different types of roof windows available in the market today, which can be broadly categorized as follows: 1. Fixed Roof Windows – Where ventilation is not required, fixed skylights or room windows are just ideal to have copious daylight and a charming view of the surroundings. As the name suggests, these do not come with an opening sash, and are generally ideal for stairwells, hallways, and other dark closed-in spaces that need plenty of daylight and sky views. 2. Manual Venting Roof Windows – Where manual operation and natural ventilation is desired, these roof windows are installed within the reach of the occupants. These are a cost effective solution to allow plenty fresh air and natural light into the room, with a perfect balance of moisture and comfort level. 3. Electric Venting Roof Windows – These are used as overhead installations in areas like bath and kitchen that require ample natural ventilation. With just a touch of button, these skylights allow plenty of fresh air and natural light into the room.