HDC311 Super Wick Humidifier Filter - Technology and construction - Uses advanced lower density structure technology - Contains 61 sheets of high quality reinforced paper wicking - Performance and efficiency - Higher efficiency with less pressure and better overall quality - Maximum surface area for extra absorbency - Leads to improved moisture output and longer use - Durability and reliability - Hot glue strips and dense construction prevent slumping or sagging when wet - Maintains consistent performance over time - Replacement guidance - For optimum performance, replace the wick at the beginning of each season - Or every 1-3 months depending on usage and hardness of water - Compatibility and part information - Part number: Essick Air AIRC-ARE HDC-311 - Compatible with Essick Air evaporative humidifiers that use HDC-311 wicks - Use scenarios - In a living room or bedroom during dry winter months to maintain stable humidity - In a small office or workspace requiring reliable and consistent humidity output - In homes with hard water or frequent use where a regular wick replacement schedule is important