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Reference · Terrestream Indoor Air Quality Sensor

Notice to Cohabitants and Visitors

Effective June 1, 2026 · Version 1.0 · Operational reference; the Terms of Service control.

This page is the cohabitant-notice reference identified at §13.5(4) of the Terms of Service for the Terrestream Indoor Air Quality Sensor (the “ Device ”). It describes what a Device owner (“ You ”) is expected to tell household members, roommates, long-term guests, in-home caregivers, children of any age, and short-term visitors about the Device’s presence and the categories of environmental data it collects. The Terms of Service control; this page is operational reference material only.

Why this page exists

Where the Device is deployed in a residential setting occupied by persons other than You, You represent under §13.5(4) that:

  1. You have authority to operate the Device in that setting;
  2. You have provided reasonable notice to those persons of the Device’s presence and the categories of environmental data it collects; and
  3. Any consent required by two-party-consent or wiretap statutes governing the monitoring of activities in a shared space has been obtained.

This page exists so that You have a single, durable reference You can point cohabitants and visitors to in order to satisfy the “reasonable notice” obligation. Family Circle members and Aging-in-Place Dependents are addressed separately by §8.8 of the Terms of Service and the Family Circle feature.

What the Device collects

The Device measures environmental conditions in the air around it. The specific environmental parameters depend on the Device configuration; the current bill-of-materials and per-configuration parameter list is at /legal/sensor-compliance. At v4.0 the parameters include:

  • particulate matter (PM1.0, PM2.5, PM4.0, PM10);
  • a volatile-organic-compound (VOC) index;
  • a nitrogen-oxide (NOx) index;
  • temperature;
  • relative humidity;
  • carbon dioxide (CO2);
  • barometric pressure;
  • ambient illuminance (light level), used for display brightness management.

These measurements are transmitted to Aerodyne’s Cloud Services when the Device is in Connected Mode, where they are associated with the Device serial number and the account that activated the Device. What Aerodyne does with that data, and the rights of the persons whose environment the Device measures, are described in the Privacy Policy.

What the Device does not collect

The Device does not contain a microphone, a camera, an infrared imager, an ultrasonic ranging sensor, a radar, a millimeter-wave occupancy sensor, or any other transducer capable of recording the appearance, identity, speech, body movement, biometric characteristics, or specific location of persons in its vicinity. The Device does not:

  • record audio of any kind;
  • record or transmit video, photographs, or thermal imagery;
  • detect or count individual persons or distinguish one person from another;
  • identify or recognize faces, voices, or biometric characteristics;
  • detect smoke, fire, carbon monoxide (CO), radon, refrigerant, or any other life-safety hazard not enumerated in the Device’s published parameter list;
  • determine the exact location of persons within the room beyond a generic “air around the Device” observation.

The Device is therefore not a surveillance device in the conventional sense. The environmental measurements it does collect may, however, vary with patterns of occupancy in the home (for example, CO2 tends to rise in occupied rooms), and that pattern information is part of what is shared with the Cloud Services.

What You should tell cohabitants

Reasonable notice to a cohabitant typically includes the following points, communicated in a manner appropriate to the cohabitant (in writing for adults; in age-appropriate plain language for children; in the cohabitant’s preferred language where known):

  1. That there is a Terrestream Indoor Air Quality Sensor installed in the home, where it is located, and what it looks like.
  2. That the Device measures environmental parameters — the list above — and transmits them to Aerodyne’s Cloud Services under Your account.
  3. That the Device does not record audio, video, or images, and is not a surveillance device.
  4. That You, as the Device owner, can see the readings in the Mobile App or Web Dashboard, and that any AI-generated insights described at /legal/ai-models are based on the environmental data only.
  5. That the cohabitant may ask You questions about the Device, and that the canonical descriptions live at terrestream.com/legal.

Sample notice You may use

The notice below is a sample You may copy verbatim, adapt, or replace with Your own equivalent disclosure. Using this sample does not, by itself, satisfy any disclosure obligation that may apply to You under local law; You remain responsible for any jurisdiction-specific requirement.

Air-quality sensor in this home

There is a Terrestream Indoor Air Quality Sensor installed in this home. It measures the air — including particulate matter, volatile-organic-compound index, nitrogen-oxide index, temperature, relative humidity, carbon dioxide, barometric pressure, and ambient light — and sends those readings to Aerodyne’s Cloud Services under the homeowner’s account.

The Device does not contain a microphone or camera. It does not record audio, video, or images. It does not detect smoke, fire, or carbon monoxide (CO). Smoke alarms and CO alarms remain installed and operating independently.

More information is available at terrestream.com/legal/in-home-notice.

Short-term rentals and lodging

If You operate the home as a short-term rental, vacation rental, or similar lodging, You should additionally:

  1. Disclose the presence of the Device in Your listing on each booking platform You use (for example, in the “safety devices” or “security cameras / noise monitors” section of the listing), describing the Device as a non-surveillance environmental sensor and identifying the parameters it measures.
  2. Post a visible written notice at or near the Device in the rental unit, drawing on the sample notice above.
  3. Confirm Your booking platform’s monitoring-device disclosure rules and follow them where they are stricter than this page (for example, Airbnb’s “noise decibel monitoring” or “sensing devices” rules).

Jurisdiction-specific notes

The Device does not record audio or video, so two-party-consent wiretap statutes (in the U.S. states that have them — e.g., California, Florida, Illinois, Maryland, Massachusetts, Michigan, Montana, Nevada, New Hampshire, Oregon, Pennsylvania, Vermont, Washington, and Connecticut) generally do not apply to its operation. Nevertheless, You remain responsible for any local disclosure or consent rule that does apply, including but not limited to:

  • Quebec, Canada. The Act respecting the protection of personal information in the private sector (Law 25) and the Civil Code of Quebec impose privacy obligations on persons who collect or transmit personal information about another person in a shared dwelling. Disclosure under this page is offered in French at /legal/in-home-notice (français).
  • British Columbia and Alberta, Canada. The provincial Personal Information Protection Act (PIPA) imposes notice obligations on persons collecting personal information in a residential context.
  • European Union and United Kingdom. The General Data Protection Regulation (GDPR) and the UK GDPR impose “data controller” obligations on persons who collect personal data about other persons. Operating the Device in a shared household may make You a controller for the cohabitants’ data within the meaning of Lindqvist-line case law; the household exception in Article 2(2)(c) is narrowly construed.

This page is not legal advice and does not enumerate every applicable rule.

Family Circle members and Aging-in-Place Dependents

Family Circle members and Aging-in-Place Dependents are not “cohabitants” for purposes of this page. They have their own account and their own access to the Device’s data, and the permissions tier they are assigned to controls what they can see and do. See §8.8 of the Terms of Service and the Family Circle feature description.

Updates

Aerodyne updates this page when (a) a Device parameter is added or removed at /legal/sensor-compliance, or (b) the cohabitant-notice provisions of §13.5 are materially modified. Prior versions are preserved at /legal/archive.

Version history

  • June 1, 2026 · v1.0. Initial publication.

Cross-references

  • Terms of Service §13.5 — legal-compliance and cohabitant-notice obligations on the Device owner (the binding clause).
  • Terms of Service §8.8 — Family Circle (Pro feature) — addressed separately from cohabitant notice.
  • /legal/sensor-compliance — the current bill-of-materials and per-configuration parameter list referenced above.
  • /legal/privacy — what Aerodyne does with the data the Device transmits.
  • /legal/ai-models — AI Output limitations (no audio/video inputs to any AI Output produced by the Device).