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 Interconnected CO Alarm C1-R, mainly on rating, connectivity, and sensors.
What pushes it ahead is rating, connectivity, and sensors, and alerts and Built-in light keep the advantage from looking narrow. There is still a case for Heiman Interconnected CO Alarm C1-R, but mainly if integrations are what you value most. As a general recommendation, Google Nest Protect (Wired) comes out on top.
News by email
Still comparing? Get what's new by email
New releases and the smart home news worth knowing, in your inbox.
No spam. Unsubscribe in one click.
| Feature | Google Nest Protect (Wired) | Heiman Interconnected CO Alarm C1-R | Winner |
|---|---|---|---|
| Rating | 4.6 | 4.2 | Google Nest Protect (Wired) |
| Connectivity | 2.4 GHz WiFi, Bluetooth, Other | 2.4 GHz WiFi, Other | Google Nest Protect (Wired) |
| Integrations | Google Home, Home Assistant | Google Home, Samsung SmartThings, Home Assistant | Heiman Interconnected CO Alarm C1-R |
| 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) |
| 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 |
| Tests Itself | YES | YES | Tie |
Winner
Price unavailable right now
- + Rating: 4.6
- + Connectivity: 2.4 GHz WiFi, Bluetooth, Other
- + Sensors: Smoke, CO, Occupancy, Temperature, Humidity, Ambient Light, Motion
- - Integrations: Google Home, Home Assistant vs Google Home, Samsung SmartThings, Home Assistant
$31.97
- + Integrations: Google Home, Samsung SmartThings, Home Assistant
- - Rating: 4.2 vs 4.6
- - Connectivity: 2.4 GHz WiFi, Other vs 2.4 GHz WiFi, Bluetooth, Other
Frequently Asked Questions
Which is better overall: Google Nest Protect (Wired) or Heiman Interconnected CO Alarm C1-R?
Google Nest Protect (Wired) has the stronger overall profile in this comparison, especially for rating, connectivity, and sensors.
What is the biggest difference between Google Nest Protect (Wired) and Heiman Interconnected CO Alarm C1-R?
Rating is one of the clearest differences: Google Nest Protect (Wired) lists 4.6, while Heiman Interconnected CO Alarm C1-R lists 4.2.
Who should buy Google Nest Protect (Wired)?
Choose Google Nest Protect (Wired) if your priority is rating and connectivity and that matters more than integrations.
Who should buy Heiman Interconnected CO Alarm C1-R?
Choose Heiman Interconnected CO Alarm C1-R if your priority is integrations and that matters more than rating.
Spotted something wrong on this page? Tell us and we will fix it.
Our store on AmazonShop our ideas on AmazonLists of the smart home setups we would put together ourselves, ready to add to your Amazon cart.Shop on AmazonFull comparison table
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
Photoelectric Smoke Alarm
- Smoke & CO Detectors
WiFi Smoke & CO Detector
- Smoke & CO Detectors
Wi-Fi CO Alarm
- Smoke & CO Detectors
SC07-MR Smart Smoke & CO Alarm
- Smoke & CO Detectors
HS1SA-E Zigbee Smoke Alarm
- Smoke & CO Detectors
SD19-MN Interconnected Smart Smoke Alarm
- Smoke & CO Detectors
Nest Protect (Battery)
- Smoke & CO Detectors
Smart Smoke Detector
- Smoke & CO Detectors
Smoke Alarm
- Smoke & CO Detectors
XC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts
- Smoke & CO Detectors
Carbon Monoxide Detector C1-S
- Smoke & CO Detectors
Smoke and CO Alarm HM-636THS
- Smoke & CO Detectors
Matter Smoke Detector S1-TM
- Smoke & CO Detectors
Wi-Fi Smoke Alarm
- Smoke & CO Detectors
Smart Smoke & CO Detector with Ring
- Smoke & CO Detectors
Smoke Alarm E10
- Smoke & CO Detectors
Smoke Alarm HM-636PHS
- Smoke & CO Detectors
Interconnected Smoke Alarm S1-R
- Smoke & CO Detectors
SMCO410 Smoke Detector & CO Alarm
- Smoke & CO Detectors
SC5 Battery Smart Smoke & 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
Carbon Monoxide Detector C1-S
- Smoke & CO Detectors
HS1SA-E Zigbee Smoke Alarm
- 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