"A roof window is an outward opening window that is incorporated as part of the design of a roof. Often confused with a skylight, a roof window differs in a few basic ways. A roof window is often a good option when there is a desire to allow both light and fresh air into the space.
A roof window tends to be larger than a skylight, making it possible to enjoy a wider view of the sky overhead. In addition, skylights are usually stationary; that is, they cannot be opened and closed. With some designs of a roof window, it is possible to retract a portion of the glazed panes to allow in fresh air as well as enjoy the natural light." - (en.wikipedia.org 25.09.2020)
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