Ventilation Parameters That Influence the Building Construction and Process Design

2 Ventilation Parameters that Influence the Building Construction and Process Design 

The main target levels inside a building are normally set for temperature, humidity, air velocity, airflow rate (and air distribution), and contaminant concentration.1 - 

The temperature limits inside a building are mostly within the variations of the temperature outside, and the heat resistance requirements on the building materials inside are the same as the requirements on materials used outside. There could be some additional requirements on outside materials depending on rain, snow, wind, sunshine, etc. When the temperatures inside, whether higher or lower than outside, will be used because of the process, the building materials must be chosen with these requirements taken into account, especially when heat radiation is a factor. This should not be confused with demands on temperature and humidity insulation. 

To maintain the target level for temperature, a specific amount of insulation may be needed, since too little insulation makes it impossible to keep the temperature levels. For each building it is necessary to make a detailed cost-benefit calculation of insulation and heating/cooling costs. The same discussion is applicable to temperature variation requirements, both for the rate of change and the period lengths (see Chapter 16). 

The requirements on building materials due to air velocities inside the building are generally negligible. However, sometimes the allowed contaminant concentrations can be of such magnitude that moving air may affect surfaces. In such cases it is necessary to use materials with sustainable surfaces. Normally this demand is valid only for the transport of dust-laden air in 

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