Winner
Price unavailable right now
Updated October 2026
Data from the official Google and Heiman sites.
2026 verdict
Google Nest Protect (Battery) is the more complete option versus Heiman Smoke Alarm HM-636PHS in 2026, helped most by rating, connectivity, and integrations.
It wins the broader comparison through rating, connectivity, and integrations, while sensors and alerts help confirm the result. Choose Heiman Smoke Alarm HM-636PHS only if warranty and battery life matter more to you than the broader advantage from Google Nest Protect (Battery). As a general recommendation, Google Nest Protect (Battery) comes out on top.
Works with
Connectivity
- Wi-Fi 2.4 GHz
- Bluetooth
vs
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| Feature | Google Nest Protect (Battery) | Heiman Smoke Alarm HM-636PHS | Winner |
|---|---|---|---|
| Rating | 4.4 | 4.2 | Google Nest Protect (Battery) |
| Warranty | 2 years | 10 years | Heiman Smoke Alarm HM-636PHS |
| Battery Life | 2 years | 10 years | Heiman Smoke Alarm HM-636PHS |
| 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 | Smoke | Google Nest Protect (Battery) |
| Alerts | Fire Alerts, CO Alerts, Low Battery Alerts | Fire Alerts, Low Battery Alerts | Google Nest Protect (Battery) |
| Built-in Light | YES | NO | Google Nest Protect (Battery) |
| Pathlight | YES | NO | Google Nest Protect (Battery) |
| Screen | NO | NO | Tie |
| Built-in Siren | YES | YES | Tie |
| Tests Itself | YES | YES | Tie |
Winner
Price unavailable right now
- + Rating: 4.4
- + Connectivity: 2.4 GHz WiFi, Bluetooth, Other
- + Integrations: Google Home, Home Assistant
- - Warranty: 2 years vs 10 years
- - Battery Life: 2 years vs 10 years
17% OFF
Prime exclusive deal$24.99
$29.99
- + Warranty: 10 years
- + Battery Life: 10 years
- - Rating: 4.2 vs 4.4
- - Connectivity: None vs 2.4 GHz WiFi, Bluetooth, Other
Frequently Asked Questions
Which is better overall: Google Nest Protect (Battery) or Heiman Smoke Alarm HM-636PHS?
Google Nest Protect (Battery) has the stronger overall profile in this comparison, especially for rating, connectivity, and integrations.
What is the biggest difference between Google Nest Protect (Battery) and Heiman Smoke Alarm HM-636PHS?
Rating is one of the clearest differences: Google Nest Protect (Battery) lists 4.4, while Heiman Smoke Alarm HM-636PHS lists 4.2.
Who should buy Google Nest Protect (Battery)?
Choose Google Nest Protect (Battery) if your priority is rating and connectivity and that matters more than warranty.
Who should buy Heiman Smoke Alarm HM-636PHS?
Choose Heiman Smoke Alarm HM-636PHS if your priority is warranty and battery life and that matters more than rating.
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Compare all 27 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.
- 27 Smoke & CO Detectors
- 44 specs compared
- 41 filters
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Smoke and CO Alarm HM-636THS
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Matter Smoke Detector S1-TM
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Wi-Fi Smoke Alarm
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Smart Smoke & CO Detector with Ring
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Smoke Alarm HM-636PHS
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Interconnected CO Alarm C1-R
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SC5 Battery Smart Smoke & CO Alarm
- Cameras
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- 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)
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Nest Protect (Wired)
- 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)
- Door & Window Sensors
Window Door Alarm
- Gas Detectors
HS1CG Series Combustible Gas Sensor
- Gas Detectors
WS2CG Series Combustible Gas Detector
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Smart Motion Sensor
- Motion Sensors
WiFi Smart Motion Sensor
- Sirens
Smart Siren HS2WD series
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HS1SA-E Zigbee Smoke Alarm
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Interconnected CO Alarm C1-R
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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