General Humidifier Evaporator Sleeve Filter 81-15.

General humidifier filters (evaporator sleeves).

Measures approximately 7 1/2" H x 26 1/2" L x 1" Thick.

Removes all minerals from the water it evaporates! Minerals are left on the evaporator sleeve and are not blown into the airstream to collect in the living area.

For optimum performance replace filter every two months or, in hard water areas, more frequently if necessary.