Winner
Price unavailable right now
Updated November 2026
Data from the official Google and Heiman sites.
2026 verdict
Google Nest Protect (Wired) wins the 2026 matchup against Heiman Carbon Monoxide Detector C1-S, mainly on rating, connectivity, and integrations.
The main reason it wins is rating, connectivity, and integrations, and sensors and alerts strengthen that case. Choose Heiman Carbon Monoxide Detector C1-S only if warranty matters more to you than the broader advantage from Google Nest Protect (Wired). For the average buyer, Google Nest Protect (Wired) is the safer choice.
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| Feature | Google Nest Protect (Wired) | Heiman Carbon Monoxide Detector C1-S | Winner |
|---|---|---|---|
| Rating | 4.6 | 4.4 | Google Nest Protect (Wired) |
| Warranty | 2 years | 10 years | Heiman Carbon Monoxide Detector C1-S |
| Connectivity | 2.4 GHz WiFi, Bluetooth, Other | None | Google Nest Protect (Wired) |
| Integrations | Google Home, Home Assistant | None | Google Nest Protect (Wired) |
| Sensors | Smoke, CO, Occupancy, Temperature, Humidity, Ambient Light, Motion | CO | Google Nest Protect (Wired) |
| Alerts | Fire Alerts, CO Alerts, Low Battery Alerts | CO Alerts, Low Battery Alerts | Google Nest Protect (Wired) |
| Built-in Light | YES | NO | Google Nest Protect (Wired) |
| Tests Itself | YES | NO | Google Nest Protect (Wired) |
| Pathlight | YES | NO | Google Nest Protect (Wired) |
| Steam Check | YES | NO | Google Nest Protect (Wired) |
| Screen | NO | NO | Tie |
| Built-in Siren | YES | YES | Tie |
Winner
Price unavailable right now
- + Rating: 4.6
- + Connectivity: 2.4 GHz WiFi, Bluetooth, Other
- + Integrations: Google Home, Home Assistant
- - Warranty: 2 years vs 10 years
$29.99
- + Warranty: 10 years
- - Rating: 4.4 vs 4.6
- - Connectivity: None vs 2.4 GHz WiFi, Bluetooth, Other
Frequently Asked Questions
Which is better overall: Google Nest Protect (Wired) or Heiman Carbon Monoxide Detector C1-S?
Google Nest Protect (Wired) has the stronger overall profile in this comparison, especially for rating, connectivity, and integrations.
What is the biggest difference between Google Nest Protect (Wired) and Heiman Carbon Monoxide Detector C1-S?
Rating is one of the clearest differences: Google Nest Protect (Wired) lists 4.6, while Heiman Carbon Monoxide Detector C1-S lists 4.4.
Who should buy Google Nest Protect (Wired)?
Choose Google Nest Protect (Wired) if your priority is rating and connectivity 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 that matters more than rating.
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Compare all 28 Smoke & CO Detectors side by side
You are looking at two of them. The full table lines up all Smoke & CO Detectors in the catalog with the same specs, so you can filter by what you need and sort by price or rating.
- 28 Smoke & CO Detectors
- 45 specs compared
- 42 filters
- Smoke & CO Detectors
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Smoke Alarm
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XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts
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Smoke and CO Alarm HM-636THS
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Matter Smoke Detector S1-TM
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SD19-MN Interconnected Smart Smoke Alarm
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Wi-Fi Smoke Alarm
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Smart Smoke & CO Detector with Ring
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Smoke Alarm E10
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Smoke Alarm HM-636PHS
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Interconnected Smoke Alarm S1-R
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Interconnected CO Alarm C1-R
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SC5 Battery Smart Smoke & CO Alarm
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SMCO410 Smoke Detector & CO Alarm
- Cameras
Nest Cam (outdoor or indoor, battery)
- Cameras
Nest Cam Floodlight
- Cameras
Nest Cam Indoor (Wired, 3rd Gen)
- Cameras
Nest Cam Outdoor (Wired, 2nd Gen)
- Cameras
Nest Cam (indoor, wired)
- Displays
Nest Hub (2nd Gen)
- Displays
Nest Hub Max
- Doorbells
Nest Doorbell (battery)
- Doorbells
Nest Doorbell (wired, 3rd Gen)
- Doorbells
Nest Doorbell (wired, 2nd Gen)
- Door Locks
Nest x Yale Lock
- Routers
Nest WiFi Pro
- Smoke & CO Detectors
Nest Protect (Battery)
- Speakers
Nest Audio
- Speakers
Nest Mini (2nd gen)
- Streaming Devices
TV Streamer (4K)
- Temperature & Humidity Sensors
Nest Temperature Sensor (2nd gen)
- Temperature & Humidity Sensors
Nest Temperature Sensor
- Thermostats
Nest Learning Thermostat (4th gen)
- Thermostats
Nest Learning Thermostat
- Door & Window Sensors
Window Door Alarm
- Gas Detectors
HS1CG Series Combustible Gas Sensor
- Gas Detectors
WS2CG Series Combustible Gas Detector
- Motion Sensors
Smart Motion Sensor
- Motion Sensors
WiFi Smart Motion Sensor
- Sirens
Smart Siren HS2WD series
- Smoke & CO Detectors
HS1SA-E Zigbee Smoke Alarm
- Smoke & CO Detectors
Interconnected CO Alarm C1-R
- Smoke & CO Detectors
Interconnected Smoke Alarm S1-R
- Smoke & CO Detectors
Matter Smoke Detector S1-M
- Smoke & CO Detectors
Matter Smoke Detector S1-TM
- Smoke & CO Detectors
Smart CO Alarm
- Smoke & CO Detectors
Smoke Alarm HM-636PHS
- Smoke & CO Detectors
Smoke and CO Alarm HM-636THS
- Vibration Sensors
Smart Vibration Sensor HS1VS series
- Water Leak Sensors
Smart Water Leakage Sensor