Replacing an air filter too early wastes money—but waiting too long quietly drives up energy bills as your HVAC works harder through a clogged filter. In this guide, we break down how to find the “sweet spot” by weighing efficiency loss, filter cost, and labor. We also introduce an IoT-based calculator powered by real-time readings from the Ellenex PDT2 Differential Pressure Sensor, helping you know when to order a new filter and when it’s time to schedule maintenance.

Data centers live and die by airflow. When server racks lose positive pressure, cooling becomes less efficient, contaminants can creep in, and fans work harder—raising risk and operating cost. In this customer story, Ellenex shows how positive pressure monitoring delivers near real-time visibility into rack health, enabling predictive maintenance and smarter interventions before issues turn into outages. Using the PDT2-L differential pressure sensor (with temperature), operat