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The return air is always less than the supply air. The return air is equal to...

  1. The return air is always less than the supply air. The return air is equal to the supply air minus the exhaust air and an amount of air used to positive pressure the space. Buildings are normally designed to be positive pressure. Positive pressure is achieved by bringing in more outside air than is exhausted from a space.

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Answer #1

Buildings are maintained at positive pressure so that air-conditioned air does not escape from the space.

Positive pressure is maintained by bringing more fresh air than the exhaust air.

Supply air + fresh air > return air + exhaust air

So, the above statement is true.

TRUE

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