Reviewing your fit-out air quality decisions a year later

Key takeaways

• Offices rarely stay exactly as designed at fit-out, so plans can quietly drift out of date
• Recheck sizing for any space where headcount or layout has visibly changed
• Confirm certifications and servicing records reflect equipment actually in use today
• Update documentation as part of the review, not as a task to postpone afterward
• Set a recurring reminder tied to an existing facilities task, not a memory alone

Why fit-out decisions deserve a revisit as the office evolves

An air purifier sizing plan made during a fit-out reflects the office as it was designed on paper: meeting rooms sized for a certain headcount, an open desk area planned around a specific layout. Offices rarely stay exactly as designed for long. Headcount grows, teams reorganise into different zones, and a meeting room originally planned as a quiet space becomes a regularly booked hot-desk overflow area.

A plan that made sense at fit-out can quietly stop matching reality within a year, without anyone deciding to change it deliberately. Nobody sits down and decides the sizing is now wrong; it just drifts out of alignment as the space is used differently than originally intended.

Revisiting the plan periodically catches this drift before it becomes a bigger gap. It does not need to be a major project. A short walk-through comparing the original plan against how the space is actually being used is usually enough to spot what has changed.

Checking if headcount or layout changes affect the original plan

Start by comparing the current headcount and layout against what the original sizing was based on. If a meeting room now regularly holds more people than it was designed for, or an open area has been reconfigured with new partitions, the original coverage calculation may no longer fit.

The underlying method stays the same: required clean air delivery rate is floor area multiplied by ceiling height multiplied by the target air changes per hour for that kind of space, typically four to five for a general office. What changes is the input, the actual floor area now in use for a given purpose, and sometimes the target itself if a space has shifted from occasional use to constant occupancy.

A quick recalculation for any space that has visibly changed is worth doing even if most of the office still matches the original plan closely.

Confirming certifications and servicing records are still current

Alongside checking the physical layout, confirm that the certifications for your installed equipment are still current and that servicing records reflect what has actually happened since fit-out. A certificate that was valid at installation does not automatically stay relevant if equipment has since been replaced or moved.

If any units were added, swapped or relocated since the fit-out, make sure the certification and servicing paperwork reflects that, rather than still describing the original installation. This is a common gap, since equipment changes tend to happen quietly through facilities requests rather than a formal update to the original plan.

A brief cross-check against your compliance folder, if your office maintains one, is a natural point to fold this review into rather than treating it as a separate task.

Updating documentation to reflect any changes made since

Once you have identified what has changed, whether that is headcount, layout, equipment or servicing arrangements, update the documentation to match. This might mean revising a sizing spreadsheet, updating a facilities record, or simply noting the date and nature of the change in your compliance folder.

Leaving the original fit-out documentation unchanged while the actual office has moved on creates a growing gap between what is recorded and what is real, which becomes a problem the next time anyone, an auditor, a new facilities manager or a tender reviewer, needs to reference that documentation.

Treat this update as part of the review itself, not a follow-up task that might get postponed indefinitely once the walk-through is done.

Setting a reminder for the next periodic review

Rather than relying on someone remembering to revisit the plan, set a calendar reminder for the next review, whether that is annually or tied to another recurring facilities task your office already runs. This turns an easily forgotten good intention into something that actually happens.

Tie the review to an existing rhythm where possible, an annual lease review, a facilities budget cycle, or a fire safety inspection, rather than creating an entirely new standalone task competing for attention on its own.

Our claims verification page reflects the same principle applied to documentation generally: keep it current, and revisit it deliberately rather than only when prompted by an external request.

Next step

A fit-out plan is a starting point, not a fixed record. Our claims verification page sets out the standard we apply to our own documentation, a useful model for keeping your office's air quality records current.

Frequently asked

Should fit-out air quality decisions be revisited over time?

Yes. An office rarely stays exactly as designed during fit-out, so the original sizing and equipment plan is worth revisiting periodically to check it still matches how the space is actually being used.

Do headcount or layout changes affect the original plan?

They can. A meeting room that regularly holds more people than planned, or a space that has been reconfigured, may need its coverage recalculated using the same clean air delivery rate method applied at fit-out.

Is it worth setting a reminder for periodic review?

Yes, since relying on memory alone means the review is easily forgotten. Tying it to an existing recurring task, such as an annual lease or facilities review, makes it more likely to actually happen.

Related reading

• How We Verify Our Claims
• Best Office Air Purifiers in Singapore: A Sizing Guide