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Devices
Envora One Available Eleven channels · one fused IAQ score Envora Radon Coming soon Real-time radon · 0–2,000 Bq/m³
Capabilities
Features Alerts, history, dashboards Developers API · MQTT · Home Assistant Envora Fleet Multi-device · org · SSO · audit
All sensors
Overview of the eleven measurements
Carbon Dioxide ppm The breath signal. How fresh is the air you are in? Carbon Monoxide ppm Low-level exposure, tracked over time. Particulate Matter µg/m³ See what you breathe. Down to one micrometre. Temperature & Humidity °C · %RH Comfort is a range, not a number. Barometric Pressure hPa Weather, altitude, storms — all in one number. VOC & IAQ Index index Every gas. Every particle. One honest score. Sound Level dBA The ambient floor, measured — never recorded. Ambient Light lx Your circadian signal, measured.
For your space
All solutions
 Home Kitchens, bedrooms, nurseries, basements. Envora shows you what you breathe — and tells you how to fix it, usually for free. Office & Co-work CO₂ is the single strongest environmental lever on office productivity — and the cheapest to fix. Envora gives facilities teams and founders the number to argue with. CO₂ and indoor air quality monitoring for schools Classroom CO₂ and indoor air quality evidence for better ventilation decisions, measurable cognitive lift, and the data trail governors and parents want. Labs & Clinics Envora One is precise enough for laboratories, clinics and regulated spaces, and comes with a signed calibration certificate per device ID. Studios & Gyms Hot yoga, spin, HIIT and small studios generate extreme humidity and CO₂ loads. Envora tells you how your ventilation is holding up — live, per-room, per-class. Podcasts & Studios Envora flags the HVAC hum, the fridge compressor, the neighbour's drill — and the concentration drift that flattens your delivery — before the tape picks any of it up. Landlords & Letting Continuous, timestamped indoor air quality records for every unit you manage — so damp disputes end in data, not arguments.
What it protects against
All protection guides
 Mould & damp risk Invisible until it is not. Allergies & dust sensitivity The 40–50% RH sweet spot. Long-term toxic gas exposure What you cannot smell, Envora can. Cooking pollution Your kitchen is an industrial chimney. Sleep & bedroom air Sleep is an environmental sport. Winter dry air Heated air is parched air. Outdoor air events When the air outside is worse than inside.
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Developers

Indoor air quality monitor API

A serious indoor air quality monitor with API, MQTT and Home Assistant from day one. Read the data, automate from events, integrate with your stack.

Developer overview
  • REST API · documented
  • MQTT native broker
  • Home Assistant first-class
  • Local-only mode
  • CSV export
  • Webhooks · signed

Supported integrations

REST API — JSON over HTTPS. Documented endpoints for current readings (per-device latest), historical reads (windowed), device metadata, webhook subscriptions, and account-level configuration. Authentication via account-scoped tokens.

MQTT broker — native, no community bridge. Devices publish per-channel topics with Home Assistant auto-discovery enabled by default. Topic structure: `envora/{device_id}/{channel}` for live values, `envora/{device_id}/iaq` for the fused score.

Webhooks — HTTPS POST on alert events, signed with HMAC-SHA256. Retries with exponential backoff up to 24 hours. Signature verification documented and example code provided.

CSV export — full historical export from the dashboard, scoped by device and date range.

Home Assistant — first-class, every channel as a sensor entity via MQTT auto-discovery.

Example use cases

- Drive a humidifier or dehumidifier from real-time RH readings, with automation rules in Home Assistant.
- Stream CO₂ readings into InfluxDB / Grafana for long-term retention beyond Envora's 3-year window.
- Push a Slack alert when PM2.5 in the kitchen exceeds a threshold (webhook → your webhook receiver → Slack API).
- Build a tenant-safe public dashboard using the REST API and your own visualisation stack.
- Integrate with a building management system (BMS) over Modbus by translating MQTT to Modbus with a small adaptor.

Data ownership and local-only mode

Your readings are yours. The REST API has no rate limits for personal household use. MQTT is native and works against your existing broker. Local-only mode keeps everything on your LAN with no Envora cloud account required.

If Envora disappears tomorrow, your devices keep running and your data keeps flowing — that is a deliberate architectural choice, not an accident.
Buy a developer-friendly air monitor

Envora One — £249, one-time. API, MQTT, Home Assistant and local-only mode included.

Developer docs
More for developers: MQTT air quality sensor · Home Assistant CO₂, PM2.5 and VOC sensor
FAQ

FAQ — Indoor air quality monitor API

Is the API rate-limited?
No rate limits for personal household use. Organisations on Envora Fleet have tier-appropriate rate limits documented in the developer docs.

Can I subscribe to events without polling?
Yes — both MQTT (subscribe to per-channel topics) and webhooks (signed HTTPS POSTs on alert events) avoid polling.

Does the API work in local-only mode?
Yes. The REST API is served directly from the device when local-only mode is enabled. Same JSON schema, same endpoints, no internet round-trip.

Is there a Python / Node / Go client library?
Reference clients are documented for Python, Node and Home Assistant in the developer docs. The API is straightforward enough that hand-rolled HTTP clients work fine.
Buy Envora One

A serious air monitor for developers.

API, MQTT, Home Assistant, local-only mode, CSV export. £249 one-time, no home subscription.

Buy Envora One — £249 Developer docs

Free UK & EU shipping · 2-year warranty · Reply within one UK business day.