What is IAQ?
A single composite score that summarizes indoor air, calibrated to the same 0–500 scale as the U.S. EPA outdoor AQI.
Articles tagged "Composite indices"
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AQI vs IAQ: the same scale, two contexts
Both numbers use the same 0–500 color band, but the math is different and so is the answer to "is it bad?"
WHO vs EPA: two number systems, two philosophies
EPA NAAQS is regulatory. WHO 2021 is aspirational. The dashboard shows you both.
Co-movement patterns: the fingerprint catalog
A single metric tells you a number. Several metrics moving together tell you what happened.
Breathe Better. Live Smarter.
Turn air-quality knowledge into action.
One sensor. Twelve signals. Indoor readings connected to outdoor context and plain-English recommendations. Everything you just read can be measured live in your own home.
$249 USD one-time
Buy Terrestream Explore the sensor- No subscription required
- 30-day returns
- 1-year limited warranty
- Fast shipping via FedEx
Six sensors. Twelve signals.
Built on genuine Sensirion, Bosch, and Texas Instruments sensors.
- COâ‚‚
- IAQ
- VOC
- NOâ‚“
- PM1
- PM2.5
- PM4
- PM10
- Temperature
- Humidity
- Pressure
- Light
Included
- In the box: the sensor, USB-C cable, power adapter, and printed field guide
- Dashboard and mobile app included
- Privacy-first air data
Works with
- Home Assistant
- MQTT
Home Assistant
MQTT