Danfoss / Eaton HPU Accessory

Even after the system shuts down and cools off overnight, the Mobile-gate media slows the vapor equilibrium process enough that the dew point inside the reservoir climbs very slowly. By the time the reservoir surfaces have dropped to ambient temperature, the internal dew point is still lower than the surrounding air temperature, which means condensation doesn't get a chance to form. Most breathers stop working the moment the system goes idle, but this one keeps doing its job through the whole cool-down cycle.