Maintenance, filters and servicing intervals

Where this usually goes wrong

A purifier that keeps running does not mean it is still doing its job. The fan keeps turning long after a pre-filter is clogged or a HEPA stage is saturated, and nothing on the front panel necessarily tells you that airflow has quietly dropped. The buyers who end up disappointed with an air purifier are rarely buyers who chose the wrong unit — they are buyers who never had a maintenance plan attached to the one they bought. Getting the schedule right starts with understanding what actually drives wear, not with picking a date off a calendar.

Run hours and air quality set the pace, not the calendar

A unit running 24 hours a day in an aerosol-heavy treatment room loads its filters faster than the same unit running office hours only in a low-traffic space — continuous operation is standard in clinical and eldercare settings, but it changes what "regular" servicing means. A larger room needing a higher CADR also tends to mean a higher-throughput unit moving more air, and more air moved means more particulate loaded onto the same filter stage over the same number of days. This is why every AIRE unit has a filter indicator rather than a printed replacement date: the indicator responds to actual dust load and run hours, which is a better signal than a fixed month count could ever be. Singapore's humidity adds a further variable, since damp stretches change how dust and moisture interact with a filter — our guide to humidity and maintenance covers what to check more often during those periods.

A realistic interval table

The ranges below are typical starting points, not fixed guarantees — actual intervals depend on run hours and air quality in your specific rooms, and the filter indicator or a servicing check is the actual signal to act on, not the number of weeks that have passed.

Our guide to filter replacement scheduling sets out what usage factors shorten each interval in more detail, and our practical maintenance checklist breaks the same intervals into weekly, monthly and servicing-level tasks you can actually follow.

What you can do yourself, and what needs a technician

The pre-filter is the one stage designed for the end user to handle — our guide to cleaning the pre-filter yourself sets out the safe steps and when to stop and call a technician instead. HEPA and carbon stages are replaced, not washed, because washing damages the fine media that makes H13 HEPA effective in the first place. A UV-C lamp is a different case again: it does not fail like a household bulb switching off — its output fades gradually, which is why our guide to UV-C lamp lifespan explains what a servicing check looks for rather than waiting for a visible failure. Whether a unit is filter-based or one of the filter-free plasma-ion models changes this picture considerably: our comparison of filter-based and filter-free upkeep sets out what each looks like over a couple of years, including the trade-off between no filter changes and other servicing needs. Across either type, what wears out and what does not is a separate question from how long the unit itself lasts — our guide to unit lifespan versus parts covers how regular servicing extends the useful life of the unit as a whole.

How often a clinic setting actually needs a visit

An annual visit is a reasonable baseline for a low-traffic office, but it is not automatically enough for every setting. A dental surgery or aesthetic clinic running aerosol-generating procedures daily has a different load profile from a reception area, and our guide to clinic servicing frequency sets out how that changes the recommended visit count. For office and coworking settings, servicing is on-site rather than shipping the unit elsewhere — our guide to on-site maintenance for offices covers what a typical visit checks and how to prepare before the technician arrives. On a serviced rental agreement, filters, parts and preventive visits are already included in the rate, so the schedule above is handled rather than tracked by you; on a purchased unit, the same intervals apply but the parts and labour are quoted and billed as needed.

What we will not claim

We will not claim that keeping to this schedule prevents an outbreak, reduces sick days or delivers any other health outcome — a maintained filter is a filter performing to its tested specification, not a clinical guarantee. We will not promise a fixed replacement date that applies regardless of how a unit is actually used, because run hours and air quality genuinely do vary that figure from one room to the next. What we will state plainly is the tested specification behind the unit itself: H13 HEPA, an FDA Class 2 medical device listing held by the manufacturer, CE, RoHS and ISO 9001/14001 management system certification, detailed on our verification page.

Getting your actual interval, not a generic one

A generic schedule is a starting point; your actual interval depends on your room, your run hours and your air quality, which is exactly what a Clinic Air Report is built to establish. It costs S$150 per site visit, covers a minimum of two rooms, and measures every room on site — the report is emailed within two working days, and if a specified unit does not reach the report's air-change figure once installed, we upgrade or add a unit at no extra cost. From there, our rental option bundles servicing into the rate, our guide to renting versus buying helps weigh that against a purchase, and our contact page is the next step to get a schedule built around the rooms you actually run.