• BUY WITH CONFIDENCE This genuine replacement water panel humidifier filter was designed and manufactured in the U.S.A. by Aprilaire – the leader in indoor air quality solutions, to optimize the performance of your Aprilaire Humidifier Model: 110, 220, 500, 500A, 550, 550A, 558
• PERFECT APRILAIRE FIT Water panel humidifier filter dimensions: 10" H x 9.75" L x 1.75" W
• FOR OPTIMAL PERFORMANCE replace water panel humidifier filter annually
• HUMIDITY FOR HEALTH Aprilaire Humidifiers can help you maintain optimal humidity in your home of 40% – 60% which has been shown to reduce the incidence of respiratory infections and symptoms related to allergies and asthma by minimizing the formation of bacteria and viruses, fungi, and dust mites. In addition, you’ll feel more comfortable while also preserving items in your home susceptible to damage from changing humidity or dry conditions

This genuine Aprilaire replacement water panel humidifier filter is the backbone of your Aprilaire humidifier.  The heavy-duty aluminum mesh frame holds its shape over the life of the water panel humidifier filter as the porous ceramic-type coating absorbs water and maintains the proper level of hydration to support the evaporation process.  Water is vaporized as air warmed by the furnace passes over the water panel humidifier filter.  The humidified air is carried through the house through the air ducts.