AHU Filter Change Scheduler
A free air handling unit maintenance register: last service, interval, due date and overdue alerts — sorted by urgency, stored in your browser.
Your register stays in this browser (localStorage) — nothing is uploaded.
Add your first air handling unit to see the schedule. Sorted by urgency, the next due item is always on top.
Field notes from maintenance practice
Calendar scheduling here is the backstop for the better method: a ΔP gauge across each filter bank (pair this register with the filter-ΔP trend tool for that). Where gauges don't exist, quarterly is the defensible default — and the register's per-asset intervals matter because the AHU over the kitchen and the one serving the clean office do not load filters at the same rate.
Note filter sizes per AHU in the asset name (e.g. 'AHU-3 · 4× 592×592×96 F7') — half the cost of filter changes is people walking back for the right size. Run the register on whatever device lives where the work happens — a workshop tablet beats a spreadsheet on someone's laptop, because the person doing the job sees the list.
Sources & references
- ASHRAE 180 — HVAC inspection and maintenance practice
- Eurovent 4/23 — filter energy classification
Scheduling aid only — statutory inspection intervals, OEM schedules and your insurer's requirements govern where they differ.
AHU Filter Change Scheduler for maintenance and reliability teams: A free air handling unit maintenance register: last service, interval, due date and overdue alerts — sorted by urgency, stored in your browser. Free, private (everything runs in your browser) and ready for daily plant use.
About AHU Filter Change Scheduler
This scheduler keeps a living register of your air handling units: add each one with its last service date and interval, and the board computes due dates, sorts by urgency and flags anything overdue or due within 14 days. One tap (✓) marks a service done and restarts that asset's clock. Commercial AHU filters typically change quarterly, stretched or shortened by ΔP readings — dusty urban or industrial intakes can halve the interval, clean rural sites double it.
How to use AHU Filter Change Scheduler
- 1Add each asset with its last service date and interval — presets reflect the cited standard, and you can override per asset.
- 2The register sorts itself by urgency: overdue first, then due-soon (≤14 days), with a badge per asset.
- 3Tick ✓ when a service is done to reset that asset's clock to today — the whole register persists in your browser.
Why use AHU Filter Change Scheduler?
- ✓A free air handling unit maintenance register: last service, interval, due date and overdue alerts — sorted by urgency, stored in your browser — computed instantly with the standard formula
- ✓100% free and unlimited, with no sign-up, login or paywall
- ✓Runs entirely in your browser — readings and asset data never leave your device
- ✓Niche-specific defaults and thresholds for air handling unit, traceable to the cited standards
Frequently asked questions
How often should a air handling unit be serviced or inspected?+
Commercial AHU filters typically change quarterly, stretched or shortened by ΔP readings — dusty urban or industrial intakes can halve the interval, clean rural sites double it. Severe duty, harsh environments or regulatory requirements shorten it — and your OEM manual, insurer or local code always takes precedence over the generic default.
Do dirty AHU filters actually save energy by filtering 'better'?+
A loaded filter does capture marginally better — and costs far more than it saves: fan energy rises with ΔP (or airflow falls and spaces lose ventilation), coils foul faster once filters start bypassing, and bypass leakage around an overloaded filter defeats the filtration entirely. The economic change-out point is well below 'visibly filthy'; if a filter looks shocking at change time, shorten that unit's interval.
Calendar-based or usage-based — which scheduling is right here?+
Calendar scheduling suits air handling units because the dominant ageing mechanisms (seals drying, contamination, regulatory clocks) run on time, not duty. If a unit works double shifts, shorten its interval rather than switching methods — this register lets you set a different interval per asset.
Should I log services that happened before I started using this register?+
Add each air handling unit with its real last-service date, even if that was months ago — the register will immediately show some assets overdue, which is the truth you want visible. Starting everything 'fresh today' hides accumulated backlog and makes the first cycle look healthier than it is.
Embed AHU Filter Change Scheduler on your website
Want AHU Filter Change Scheduleron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
<iframe src="https://tooljolt.com/tools/ahu-filter-change-scheduler" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="AHU Filter Change Scheduler — ToolJolt" loading="lazy"></iframe>Related Industrial tools
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