Winner
Price unavailable right now
Updated November 2026
Data from the official Google and Heiman sites.
2026 verdict
Between Google Nest Protect (Battery) and Heiman Carbon Monoxide Detector C1-S, Google Nest Protect (Battery) is the better overall pick in 2026, leading on connectivity, integrations, and sensors.
It has the clearer edge on connectivity, integrations, and sensors, and it stays ahead on alerts and Built-in light. The only strong reason to choose Heiman Carbon Monoxide Detector C1-S is if warranty and battery life are more important to you than the overall verdict. That makes Google Nest Protect (Battery) the clearer recommendation in 2026.
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The biggest differences
Where these two are furthest apart, and by how much.
- Warranty5×Heiman Carbon Monoxide Detector C1-S10 years vs 2 years
- Battery Life5×Heiman Carbon Monoxide Detector C1-S10 years vs 2 years
| Feature | Google Nest Protect (Battery) | Heiman Carbon Monoxide Detector C1-S | Winner |
|---|---|---|---|
| Warranty | 2 years | 10 years | Heiman Carbon Monoxide Detector C1-S |
| Battery Life | 2 years | 10 years | Heiman Carbon Monoxide Detector C1-S |
| Connectivity | 2.4 GHz WiFi, Bluetooth, Other | None | Google Nest Protect (Battery) |
| Integrations | Google Home, Home Assistant | None | Google Nest Protect (Battery) |
| Sensors | Smoke, CO, Occupancy, Temperature, Humidity, Ambient Light, Motion | CO | Google Nest Protect (Battery) |
| Alerts | Fire Alerts, CO Alerts, Low Battery Alerts | CO Alerts, Low Battery Alerts | Google Nest Protect (Battery) |
| Built-in Light | YES | NO | Google Nest Protect (Battery) |
| Tests Itself | YES | NO | Google Nest Protect (Battery) |
| Pathlight | YES | NO | Google Nest Protect (Battery) |
| Steam Check | YES | NO | Google Nest Protect (Battery) |
| Rating | 4.4 | 4.4 | Tie |
| Screen | NO | NO | Tie |
Winner
Price unavailable right now
- + Connectivity: 2.4 GHz WiFi, Bluetooth, Other
- + Integrations: Google Home, Home Assistant
- + Sensors: Smoke, CO, Occupancy, Temperature, Humidity, Ambient Light, Motion
- - Warranty: 2 years vs 10 years
- - Battery Life: 2 years vs 10 years
$29.99
- + Warranty: 10 years
- + Battery Life: 10 years
- - Connectivity: None vs 2.4 GHz WiFi, Bluetooth, Other
- - Integrations: None vs Google Home, Home Assistant
Frequently Asked Questions
Which is better overall: Google Nest Protect (Battery) or Heiman Carbon Monoxide Detector C1-S?
Google Nest Protect (Battery) has the stronger overall profile in this comparison, especially for connectivity, integrations, and sensors.
What is the biggest difference between Google Nest Protect (Battery) and Heiman Carbon Monoxide Detector C1-S?
Warranty is one of the clearest differences: Google Nest Protect (Battery) lists 2 years, while Heiman Carbon Monoxide Detector C1-S lists 10 years.
Who should buy Google Nest Protect (Battery)?
Choose Google Nest Protect (Battery) if your priority is connectivity and integrations and that matters more than warranty.
Who should buy Heiman Carbon Monoxide Detector C1-S?
Choose Heiman Carbon Monoxide Detector C1-S if your priority is warranty and battery life and that matters more than connectivity.
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Compare all 28 Smoke & CO Detectors side by side
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- 28 Smoke & CO Detectors
- 45 specs compared
- 42 filters
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Nest Mini (2nd gen)
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TV Streamer (4K)
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Nest Temperature Sensor (2nd gen)
- Temperature & Humidity Sensors
Nest Temperature Sensor
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