Market guide
Interpret trends, data, privacy and action limits
Use the record without turning it into diagnosisA useful monitor connects a timestamped trend with occupancy, ventilation, outdoor conditions and known activities. It should narrow the next check, not create a universal safety verdict.
01
Context
Keep indoor and outdoor conditions together
Record doors, windows, HVAC state, filtration, cooking, cleaning, combustion, occupancy and nearby outdoor events.
- CO2
- Use occupancy-linked CO2 trends as ventilation information, not a complete indoor-air score.
- PM
- Compare indoor particle trends with a suitable outdoor source before assigning an indoor cause.
02
Data
Audit the complete record path
Verify local display, history interval, export, time, gaps, retention, account transfer and behavior when internet service stops.
- Privacy
- Location, occupancy patterns and institutional room data may require explicit governance.
- Cloud
- A vendor dashboard can change or disappear during the hardware life.
03
Act
Escalate through the right authority
Use ventilation, source control, filtration, testing, remediation or professional assessment appropriate to the suspected problem.
- Combustion
- Leave and follow emergency guidance for alarm, odor or acute-symptom conditions rather than watching an app.
- Boundary
- No consumer monitor guarantees source identification, health diagnosis, compliance, remediation success or safety clearance.
Evidence used
First-party sources behind this guide
- 01Indoor air qualityU.S. EPA · checked August 18, 2026Open source
- 02Air-sensor performance resourcesU.S. EPA · checked August 18, 2026Open source
- 03Current indoor air-quality monitorsAirthings · checked August 18, 2026Open source