Do you have difficulties with a dry throat or an itchy nose during winter or summer The 990-13 GeneralAire Comparable Humidifier Replacement Filter by Tier1 (2-Pack) increases humidity levels in your home， easing respiratory complaints. Moreover， this humidifier filter is affordably priced and easy to install. For best performance replace every 3-months.

Fits GeneralAire humidifiers requiring 990-13 filter， models 1137， 1040， 1042， SL16， 709， 990， Trion G100， G300， 100， 84-25054-01， 84-25054-05

Actual size is 9-3/4 in. (height) x 12 in. (width) x 1-1/2 in. (depth)

Reduces pollutants from the water used in your humidifier to produce better air quality by maintaining humidity levels during dry seasons

Optimum performance， replace every 3-months