Draw the room boundary
Measure length, width and ceiling height in metres. Note doors, partitions and connected spaces, along with usual occupancy and meeting duration.
Record how outdoor air enters; recirculating room air through a portable purifier is not ventilation. Ask facilities to investigate a stuffy room instead of treating filtration as a complete fix.
Compare airflow at the meeting setting
For a hypothetical 5 m × 4 m × 2.8 m room, volume is 56 m³. An illustrative target of four equivalent air changes per hour from the purifier alone requires 56 × 4 = 224 m³/h of clean air delivery rate (CADR).
Four is a planning assumption, not a universal health or Malaysian compliance threshold. Request CADR at a speed people will use while speaking and listening; a maximum-speed figure may not describe quiet mode.
Trial the position during a real meeting
Keep intake and outlet paths clear according to the manual. Check that chair movements do not cover the intake, cables do not cross routes and the outlet does not blow uncomfortably on a participant.
Listen from the far end of the table and test normal audio calls. Record the setting so the trial can be repeated.
Put it into practice
Your planning worksheet
A room assessment covering dimensions, occupancy, ventilation and noise.
| Assessment field | What to capture |
|---|---|
| Dimensions | Length × width × ceiling height; connected rooms |
| Use | Typical and peak occupancy; meeting length; door position |
| Ventilation | Outdoor-air arrangement and facilities contact |
| Operation | CADR and noise at selected speed; clearance; socket route |
Sources & context
- US EPA — Guide to Air Cleaners in the Home, second edition
Supports the distinctions between particle CADR, gas filtration, operating speed and clear airflow. Residential technical principles are used here for operational planning, not as workplace or clinical compliance criteria.
- US CDC / NIOSH — How Much Ventilation Is Enough?
Explains air changes and equivalent clean-air delivery. GAGE’s four-change examples are arithmetic illustrations, not this source’s recommended target; CDC discusses aiming for five or more total clean-air changes where possible in its stated context.
Sources checked 9 November 2026. Worksheets are editorial planning tools. Confirm site-specific requirements, current local guidance and the instructions for the equipment you use.
