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Enter the building air pressure, if known.
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Decide whether to use a simple infiltration calculation.
The building air pressure is not considered in a simple infiltration calculation.
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If necessary, adjust the average supply air temperature.
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Check and, if necessary, complete the geometric data on the building dimensions.
For the calculation of the heat load, the indication of the Floor area A-floor is necessary.
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Specify a global heat gain.
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Decide whether your building is a standard building or not.
The building data is entered correctly.