Fresh air:

Fresh air

Movement outside air in air-conditioned buildings offset by the loss equal to the amount of the internal state, whether it is the intention (positive supply fresh air or extract stale air) or accidentally (infiltration through the window and door spaces and door openings. Since the building of human activity must have some fresh air and some mechanical extract from toilets and services, it was decided to organize an excess of supply over extract, maintainan internal slight pressure, and thus reduces the random motion of air and dirt.

The amount of heat to be removed (or supplied in winter) to ensure the supply of fresh air can be calculated from the inside and surrounding States. He should be broken down into sensible and latent loads, as it affects the choice of coils...

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Fresh air