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.
PorVent® products have a microporous membrane with pores small enough to block entry of water, fluids, dust, dirt, salts and other contaminants. Yet at the same time, these pores are large enough to allow molecules of air and gases to exit the enclosure. This not only reduces the chance of condensation build-up, but also equalizes pressures that could otherwise stress enclosure seals to fail and admit even more moisture.