Updated October 2026
Data from the official Heiman site.
2026 verdict
In 2026, the recommendation leans toward Heiman Smoke and CO Alarm HM-636THS over Heiman Matter Smoke Detector S1-M, driven by price, rating, and battery life.
The comparison tilts its way because of price, rating, and battery life, with sensors and alerts keeping it in front. Heiman Matter Smoke Detector S1-M can still be the right pick, but only if connectivity and integrations outweigh the wider strengths of Heiman Smoke and CO Alarm HM-636THS. For the average buyer, Heiman Smoke and CO Alarm HM-636THS is the safer choice.
Connectivity
vs
Winner
10% OFF
Prime exclusive deal$35.99
$39.99
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| Feature | Heiman Matter Smoke Detector S1-M | Heiman Smoke and CO Alarm HM-636THS | Winner |
|---|---|---|---|
| Price | $39.99 | $35.99 | Heiman Smoke and CO Alarm HM-636THS |
| Rating | 3.6 | 4.4 | Heiman Smoke and CO Alarm HM-636THS |
| Battery Life | 5 years | 10 years | Heiman Smoke and CO Alarm HM-636THS |
| Connectivity | Thread Protocol | None | Heiman Matter Smoke Detector S1-M |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | None | Heiman Matter Smoke Detector S1-M |
| Sensors | Smoke | Smoke, CO | Heiman Smoke and CO Alarm HM-636THS |
| Alerts | Fire Alerts, Low Battery Alerts | Fire Alerts, CO Alerts, Low Battery Alerts | Heiman Smoke and CO Alarm HM-636THS |
| Screen | NO | NO | Tie |
| Built-in Siren | YES | YES | Tie |
| Built-in Light | NO | NO | Tie |
| Tests Itself | YES | YES | Tie |
| Pathlight | NO | NO | Tie |
$39.99
- + Connectivity: Thread Protocol
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- - Price: $39.99 vs $35.99
- - Rating: 3.6 vs 4.4
Winner
10% OFF
Prime exclusive deal$35.99
$39.99
- + Price: $35.99
- + Rating: 4.4
- + Battery Life: 10 years
- - Connectivity: None vs Thread Protocol
- - Integrations: None vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
Frequently Asked Questions
Which is better overall: Heiman Matter Smoke Detector S1-M or Heiman Smoke and CO Alarm HM-636THS?
Heiman Smoke and CO Alarm HM-636THS has the stronger overall profile in this comparison, especially for price, rating, and battery life.
What is the biggest difference between Heiman Matter Smoke Detector S1-M and Heiman Smoke and CO Alarm HM-636THS?
Price is one of the clearest differences: Heiman Matter Smoke Detector S1-M lists $39.99, while Heiman Smoke and CO Alarm HM-636THS lists $35.99.
Which one looks better on price?
Heiman Matter Smoke Detector S1-M is listed at $39.99, while Heiman Smoke and CO Alarm HM-636THS is listed at $35.99. Heiman Smoke and CO Alarm HM-636THS (better spec).
Who should buy Heiman Matter Smoke Detector S1-M?
Choose Heiman Matter Smoke Detector S1-M if your priority is connectivity and integrations and that matters more than price.
Who should buy Heiman Smoke and CO Alarm HM-636THS?
Choose Heiman Smoke and CO Alarm HM-636THS if your priority is price and rating and that matters more than connectivity.
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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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Smart Smoke Detector
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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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Interconnected Smoke Alarm S1-R
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Smoke Alarm E10
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SD19-MN Interconnected Smart Smoke Alarm
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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
- 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