HVAC Duct Static Pressure Dashboard

The default band is 250–500 Pa example operating static (system-specific — read the design external static). Treat it as a sensible starting point — your own specification, regulator, equipment manual or product datasheet sets the authoritative limits, and you can read your true band straight off the worst case those documents allow. Edit the readings against whatever band applies to you.

That something is increasingly restricting airflow downstream of where you measure: most often filters loading with dirt (the classic, gradual rise), but also a closing/stuck damper, a frosted or fouled coil, or collapsed flex duct. The fan works harder for less airflow, raising energy use and starving the far rooms. A sudden drop instead means lost resistance — a leak, an open access panel, or a failed/slipping belt reducing fan output. Trend static here alongside filter ΔP, and the two together pinpoint whether to change filters, hunt a leak, or check the fan drive.

Match the interval to the consequence and the rate of change: where an excursion spoils product or risks safety, log continuously (or as often as you can sample); where it is merely informative, daily or per-shift spot checks suffice. The in-range % and excursion count only mean something if your sampling is regular — sparse, irregular readings hide the excursions between them.

Yes — every reading is stored in this browser's localStorage on your device and nothing is uploaded to any server, which also makes the dashboard usable on sites with strict data policies. For shared, audit-grade records across a team or for regulatory retention, export the values into your own system.