Humidity does not affect the filtration characteristics of the media. Even when the media is submerged in water for 24 hours and allowed to dry, the filtration efficiency and pressured drop values are unchanged. Therefore, once the electrostatic charge is placed on the polymer, humidity has little or no effect.
Alternatively, temperature does affect the filtration characteristics of the media. Heat will lower the efficiency of the media depending on the amount and the time of exposure.
For short exposure times (3 days or less), H&V recommends not to exceed 55 degrees centigrade