U.S. Home Filter offers Gerry replacement humidifier filter pads. Your Gerry humidifier unit uses the wick filter below which is known as model# 650. This features a honeycomb design which is ideal for trapping minerals and contaminants in the water and then circulating clean, humidified air into your home to raise the moisture level during dry months. This filter pad has approximate measurements of 6-1/2" x 7-1/4" x 1" and should be changed once or twice per season. For help finding the filter you need, contact U.S. Home Filter today!