In most cases, the enclosures or buildings where the BaroVue 10 is housed have enough ventilation for the pressure to stay at equilibrium with the ambient pressure. Therefore, the sensor does not need to be vented to the outside
However, if the sensor resides in an air-tight environment, and the pressure external to this environment needs to be measured, then the sensor will need to be vented to the outside. The preferred method for measuring the pressure external to the enclosure is to use a two-plate pressure port such as the RM Young 61002 to minimize dynamic pressure errors due to wind.