Terrestream vs Apollo AIR-1

Manufacturer page checked September 12, 2026. Apollo Automation positions AIR-1 as a compact air-quality sensor for Home Assistant. The current page lists a $109.99 base configuration, optional SCD40 CO₂, PM₁/PM_2.5/PM₄/PM₁₀, RGB status pixels, Wi-Fi, ESPHome, local control, open software/CAD drawings, and no required cloud subscription.

Where Apollo AIR-1 fits. AIR-1 belongs on the shortlist for Home Assistant users who want a small local-first sensor, are comfortable with ESPHome-style ownership, and value open-source hardware culture.

Where Terrestream differs. Terrestream is built as a finished consumer and light-commercial room system: touchscreen display, underglow status language, guided setup, published component evidence, local API/MQTT/Home Assistant support, and included app/dashboard intelligence.

Important distinction. Apollo's CO₂ and MiCS gas channels are variant-dependent. AIR-1 is a strong local smart-home alternative, not the same kind of polished cloud-and-device product.

Bottom line. Choose Apollo AIR-1 when Home Assistant locality and open tinkering are the main buying criteria. Choose Terrestream when the product needs to explain room air, connect outdoor context, and feel ready for non-technical households or business conversations.