HQRP® Humidifier Water Filter Replacement for TRANE / American Standard BAYPAD02A1310A; Compatible with TRANE / American Standard HUMD300A, HUMD500A, THUMD300ABA00B, THUMD500APA00B Humidifiers; Dimensions: 10" x 13" x 1 1/2"; Universal replacement for many brands and models; The heavy-duty aluminum mesh frame holds its shape over the life of the water panel as the porous ceramic-type coating absorbs water and maintains the proper level of hydration to support the evaporation process; HQRP standard replacement humidifier pad keeps your bypass humidifier running efficiently to maintain proper humidity throughout the home; For optimum performance, replace panel once every 6 months or more often in hard water areas.