Hopper windows are a type of window that bears a close resemblance to awning windows. One of the defining features of hopper windows is that they are equipped with hinges on either the top or the bottom, allowing them to be opened inward. When opened, these windows can provide varying degrees of ventilation, and can be adjusted to a range of angles -- anywhere from 45 degrees to a full 90-degree opening.It is also worth noting that hopper windows are often installed in basements and in areas near the top of walls where the ceiling meets the wall. This type of window can be particularly beneficial in basement spaces where natural light and fresh air may be limited, as they can help to improve air circulation and bring in more sunlight.However, it is important to keep in mind that fully opening hopper windows may pose some safety concerns, especially in households with young children or pets. Overall, hopper windows can be a great option for those looking to improve air circulation and natural light in their home, but should always be used with care and caution.