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Creative photo art projects on the Ugly Duckling, a children's book, can open students' eyes to seeing life in the entirely new way. In this lesson, students will photograph old, rusty, discarded and unusually placed items found everywhere. Using photo enhancing software, they will then build a picture that can what others could have seen as ugly, turning it into something beautiful. One of the most common problems with hvac equipment is poor ventilation. This problem makes your hvac equipment work like inefficient outdated models which can waste plenty of your money. The two most common reasons behind poor venting: inadequate duct sizing as well as a dirty return air filter.