Haze Season Prep for Preschools and Student Care in Singapore
Haze checklist for Singapore preschools: one H13 HEPA purifier per room sized by CADR, filter stock and rental plans arranged before the PSI climbs.
Why haze prep has to happen before the PSI rises
Every haze episode in Singapore follows the same script. The PSI climbs, parents start messaging the centre, and by the time a principal goes shopping, retail stock is thin and rental fleets are booked out. Mid-episode is the worst possible moment to be sourcing equipment.
The centres that come through calmly treat haze the way they treat a fire drill: the plan is written, the equipment is in place, and staff know exactly what changes on a bad-air day. We supply childcare and student care settings across Singapore, and the difference between a prepared centre and a scrambling one is almost never budget — it is timing.
This guide is the pre-season checklist we walk principals through, from PSI triggers to per-room purifier sizing.
Know your triggers: PSI bands and your haze SOP
NEA publishes PSI readings and health advisories throughout any haze period, in bands running from good air through to unhealthy and beyond. Singapore's haze advisories recommend staying indoors with windows closed and running an air purifier when air quality reaches unhealthy levels — and ECDA's haze management guidance for preschools follows the same logic: shift activities indoors, close up the rooms children occupy, and keep the indoor air clean.
Your SOP should answer three questions in advance. Who checks the readings each morning and during the day? At which band does outdoor play stop? And at which band do you close windows and switch every purifier to run continuously?
Copy the specific bands into your SOP directly from the current NEA and ECDA advisories rather than from memory or a blog post — guidance is updated from time to time, and your plan should always mirror the official version.
The pre-haze checklist for principals
- Audit every occupied room. Classrooms, nap rooms, indoor play areas, the staff office — anywhere children or staff spend sustained time needs its own clean-air plan.
- Run a seal test. Check that windows close properly, fix obvious door gaps, and service the air-conditioning before the season, since closed-up rooms depend on it.
- Designate clean-air rooms. If you cannot equip every space at once, choose the rooms where children spend the most hours and equip those first.
- Size a purifier for each room by CADR. Match the unit to the room's floor area and ceiling height — our free air purifier size calculator does the arithmetic in seconds.
- Arrange the units now. Whether you buy or rent, confirm delivery before any advisory is issued. Availability disappears fastest exactly when demand spikes.
- Stock spare filters. Purifiers work harder during haze. Keep at least one replacement set per unit on site and log filter-change dates.
- Assign roles and brief parents. Name who monitors readings and who adjusts the programme, and prepare a short parent notice template so communication is one click, not a morning's work.
For the fuller operator's guide to equipment choice beyond haze season, see our guide to air purifiers for childcare centres.
Sizing: one purifier per room, matched by CADR
The sizing rule is simple: required CADR (m³/h) = floor area (m²) × ceiling height (m) × target air changes per hour. Public-health guidance since the pandemic (including the US CDC) recommends targeting at least 5 air changes per hour of clean air in occupied spaces — a sensible target for a room full of children.
Worked example: a 20 m² classroom with 2.8 m ceilings needs 20 × 2.8 × 5 = 280 m³/h. Our Fillo Plus (CADR 300 m³/h, rated for rooms up to 30 m²) covers it, and at under 53 dB it is quiet enough to keep running through nap time.
| Room | Typical size | Suggested unit | CADR |
|---|---|---|---|
| Classroom / nap room | Up to 30 m² | Fillo Plus | 300 m³/h |
| Large classroom / indoor play | 31–54 m² | Classic 400S | 480 m³/h |
| Hall / multi-purpose room | 56–96 m² | Pro 800S | 800 m³/h |
Two practical notes for centres: the Classic 400S and Pro 800S both have child locks, and every unit should be positioned where curious hands cannot reach the filter access — filters stay out of children's reach at all times.
Why H13 HEPA is the right spec for haze
Haze is a fine-particle problem. PM2.5 penetrates deep into the lungs, and young children are among the most vulnerable to it — which is why the filter grade matters more than any smart feature.
H13 is defined under EN 1822 as capturing at least 99.95% of particles at the most-penetrating particle size, and every AIRE room purifier uses H13 medical-grade HEPA as standard — the same specification we deploy in dental and specialist clinics. The activated carbon stage in our filter stack also helps with the smoky odour that a HEPA layer alone cannot remove.
If you are comparing units from other suppliers, check the filter class before anything else — our explainer on H13 versus ordinary HEPA shows what the grades actually mean.
Stand up a fleet for the season — without buying it
Buying a purifier for every room is a real capital outlay for a single centre, let alone a chain. Rental solves this: we deliver and set up correctly sized units across your rooms, and when the season passes you can return them, keep renting, or buy the units that earned their place. Ask us about filter replacement arrangements when you book your rental.
Better still, our free 30-day pilot lets you trial units in your own classrooms at zero upfront cost before committing to anything — start with one classroom and one nap room, and judge the results yourself. See how haze-season rental works, or arrange a pilot before the first advisory of the season is issued.
The whole point of haze prep is that nothing is decided in a hurry. Do the audit this week, size the rooms, and let the equipment be the easy part.
Frequently asked
When should a preschool start preparing for haze season?
Before any advisory is issued — ideally as a standing annual exercise. Audit rooms, size purifiers and stock filters while the air is clear, because retail stock and rental fleets are snapped up within days once the PSI climbs. A plan finalised mid-episode always costs more and delivers less.
How many air purifiers does a childcare centre need?
One correctly sized unit per occupied room — each classroom, nap room and indoor play space counts separately. Size by CADR using floor area × ceiling height × target air changes per hour; a 20 m² classroom with 2.8 m ceilings needs about 280 m³/h, which the Fillo Plus (CADR 300 m³/h, rated for rooms up to 30 m²) covers.
At what PSI level should children stay indoors?
Follow the current NEA advisories and ECDA guidance rather than fixed numbers quoted in articles, as official bands and advice are updated over time. Broadly, Singapore's haze advisories recommend staying indoors with windows closed and running an air purifier when air quality reaches unhealthy levels. Write the current official bands directly into your centre's haze SOP.
Can a preschool rent air purifiers just for the haze period?
Yes. We supply correctly sized units on flexible rental, and deliver them across your rooms. After the season you can return the units, continue renting or buy them — so a centre can stand up a full clean-air fleet without capital expenditure.
Related reading
- Choosing Air Purifiers for Singapore Childcare Centres
- Air Purifier Rental for Haze Season in Singapore
- Best Air Purifier for Haze in Singapore: A Sizing Guide
Not sure which model fits?
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