When the enclosure is exposed to environmental temperature changes, or temperature changes related to the device turning on and off, a pressure differential is created between the enclosure air volume and the environment. These pressure changes put extreme stress on the housing seals over time, causing them to fail and allow moisture and other contaminants to enter. PorVent® vents equalize pressure by allowing air to pass through the membrane.

A rapid change of temperature or altitude will cause pressure differentials between the enclosure and its environment. This leads to a vacuum forming within the enclosure. As the vacuum draws in contaminants, this will result in lower-performance, increased costs and dissatisfied customers. PorVent® Vents provide a durable barrier against liquid, dust, dirt and other contaminants.

In addition to failed seals, moisture can form inside enclosures due to temperature differentials. If this condensation remains inside the sealed enclosure, it can compromise functions and corrode sensitive electronics and battery contacts. Independent research has shown that condensation is more damaging than rain because it remains on the surface. PorVent® Vents reduce condensation because pressure equalization limits the formation of condensation inside an enclosure.