HVAC Filter Minder ® Indicator Model No. 143001 How Does It Work? The HVAC Filter Minder ® is a progressive or graduated indicator that monitors HVAC filters. As the filter restricts, the position indicator fills the window and locks at the highest filter restriction. The HVAC filter should be changed when the position indicator reaches the red zone. Mounting Remote Mount Grommet Mount M-10 Metric Mount Specifications Locking and non locking available) Standard Vacuum/Pressure Ranges: 0-1" H20, 0-2" H20, 0-3" H20 Operating Temperature: -40 to +250°F (-40 to +121°C) Accuracy: ±10% at final lock Material: Polycarbonate housing First movement of indicator: .2" H20 Engineered Products Co. 2940 Airport Blvd. Waterloo, IA 50703 Ph: (319) 234-0231 Fax: (319) 234-8922 info@filterminder.com