Google Nest Protect (Battery) vs Heiman HS1SA Series Smoke Alarm

The Google Nest Protect (Battery) is better overall as a safety alarm because it detects both smoke and carbon monoxide, packs extra sensors, tests itself, and adds an early spoken warning and pathlight, plus it carries a higher owner rating. The Heiman HS1SA Series Smoke Alarm wins on price and a longer 10-year battery rating, but it detects smoke only.

The biggest difference is scope. The Google Nest Protect (Battery) is a full smoke-and-CO alarm with occupancy, temperature, humidity, light and motion sensing plus self-test and a pathlight, while the Heiman HS1SA Series Smoke Alarm is a compact smoke-only Zigbee alarm that needs a hub for smart features.

The Heiman HS1SA Series Smoke Alarm is rated for a 10-year battery life on its DC3V lithium cell, while the Google Nest Protect (Battery) runs on 6 AA batteries rated for about 2 years. The Heiman wins on rated battery longevity, though the Nest trades that for far more sensing and features.

They connect differently. The Google Nest Protect (Battery) uses WiFi and works with Google Home and Home Assistant. The Heiman HS1SA Series Smoke Alarm needs a Zigbee hub to connect and then works with Home Assistant and Samsung SmartThings for alerts and automations.

Buy the Google Nest Protect (Battery) if you want combined smoke and carbon monoxide protection with spoken early warnings, phone alerts, self-testing and a pathlight, and you value that all-in-one coverage over the lowest price.

Buy the Heiman HS1SA Series Smoke Alarm if you want an affordable, compact, loud smoke alarm with a long 10-year battery rating, and you either want a discreet standalone unit or a cheap Zigbee smoke sensor for a hub-based smart home.