Limits — displayAQI Docs

The main limits in displayAQI in one table, from devices and buildings to widgets, kiosks, alerts, exports and history ranges.

Limits apply to each workspace unless the table says "per person".

Area	Limit	Value
Readings	Refresh cadence	About every 5 minutes
Devices	Devices per workspace	1,000
Devices	Devices added in one batch	50
Devices	Add-device batches	5 per minute, per person
Devices	Device name length	100 characters
Devices	Manual refresh of a device	Once every 20 seconds per device, and 10 per minute per person
Devices	History imported when a Qingping device connects	The last 30 days
Buildings	Locations per workspace (buildings, floors and rooms together)	2,000
Buildings	Locations created in one batch	50
Widgets	Widgets per workspace	10
Widgets	Metrics per widget	1 to 5, depending on the template
Widgets	Widget title length	120 characters
Kiosks	Kiosks per workspace	20
Kiosks	Devices per kiosk	20
Kiosks	Devices shown together in Auto display mode	8. With 9 or more, the kiosk rotates.
Kiosks	Metrics per device on Ambient cards	2
Kiosks	Rotation interval	5 to 300 seconds
Kiosks	Kiosk title length	120 characters
Widgets and kiosks	Logo uploads	10 per minute, per person
Alerts	Alert rules per workspace	20
Alerts	Recipients per rule	10
Alerts	Alert emails per workspace	100 every 24 hours. Each recipient's copy counts as 1.
Alerts	Cooldown between emails	15 minutes minimum, 60 by default
Alerts	Low battery threshold	5 to 95%
Alerts	Delivery attempts per alert email	3
Alerts	Verification link validity	24 hours
Alerts	Verification emails	10 per hour per workspace. A pending address can be sent a new one once a minute.
Alerts	Event history date range	90 days
Display hours	Schedules	1 per workspace, plus an optional custom schedule on each device. The end time must be later than the start time on the same day.
Dashboard	Devices loaded per page	50. Select Load more for the rest.
History	Chart time ranges	6 hours, 24 hours, 7 days, 30 days, 6 months, 1 year
History	Data points per chart	2,000. Narrow the time range for full detail.
Export	CSV export range	90 days per file
Billing	Free trial	7 days

For how each limit shows up, see Set up email alerts, Add an air quality widget to your website, Show air quality on a lobby screen and Billing and your free trial.