Unit 79 Review Questions.docx - Homework#79 Commercial...

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Homework #79 Commercial Systems Instruction: Study Unit #79 Commercial Zoned Systems. Then review the questions at the end of the chapter. You are to answer questions 1-20 at the end of the chapter> 1. Why is outside air mixed with return air?
2. How much outside air should be admitted to a space?
3. Can outside air ever be completely shut off from a space?
4. When will a preheater turn on?

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