Updated November 2026
Data from the official Heiman site.
2026 verdict
In this 2026 Heiman Interconnected CO Alarm C1-R vs Heiman Carbon Monoxide Detector C1-S comparison, Heiman Interconnected CO Alarm C1-R comes out ahead thanks to connectivity, integrations, and tests itself.
What pushes it ahead is connectivity, integrations, and tests itself, and its broader overall balance keeps the advantage from looking narrow. The only strong reason to choose Heiman Carbon Monoxide Detector C1-S is if price and rating are more important to you than the overall verdict. That keeps the verdict firmly in favor of Heiman Interconnected CO Alarm C1-R.
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Winner
Works with
Connectivity
- Wi-Fi 2.4 GHz
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| Feature | Heiman Carbon Monoxide Detector C1-S | Heiman Interconnected CO Alarm C1-R | Winner |
|---|---|---|---|
| Price | $29.99 | $31.97 | Heiman Carbon Monoxide Detector C1-S |
| Rating | 4.4 | 4.2 | Heiman Carbon Monoxide Detector C1-S |
| Connectivity | None | 2.4 GHz WiFi, Other | Heiman Interconnected CO Alarm C1-R |
| Integrations | None | Google Home, Samsung SmartThings, Home Assistant | Heiman Interconnected CO Alarm C1-R |
| Tests Itself | NO | YES | Heiman Interconnected CO Alarm C1-R |
| Battery Life | 10 years | 10 years | Tie |
| Screen | NO | NO | Tie |
| Sensors | CO | CO | Tie |
| Alerts | CO Alerts, Low Battery Alerts | CO Alerts, Low Battery Alerts | Tie |
| Built-in Siren | YES | YES | Tie |
| Built-in Light | NO | NO | Tie |
| Pathlight | NO | NO | Tie |
$29.99
- + Price: $29.99
- + Rating: 4.4
- - Connectivity: None vs 2.4 GHz WiFi, Other
- - Integrations: None vs Google Home, Samsung SmartThings, Home Assistant
Winner
$31.97
- + Connectivity: 2.4 GHz WiFi, Other
- + Integrations: Google Home, Samsung SmartThings, Home Assistant
- + Tests Itself: YES
- - Price: $31.97 vs $29.99
- - Rating: 4.2 vs 4.4
Frequently Asked Questions
Which is better overall: Heiman Carbon Monoxide Detector C1-S or Heiman Interconnected CO Alarm C1-R?
Heiman Interconnected CO Alarm C1-R has the stronger overall profile in this comparison, especially for connectivity, integrations, and tests itself.
What is the biggest difference between Heiman Carbon Monoxide Detector C1-S and Heiman Interconnected CO Alarm C1-R?
Price is one of the clearest differences: Heiman Carbon Monoxide Detector C1-S lists $29.99, while Heiman Interconnected CO Alarm C1-R lists $31.97.
Which one looks better on price?
Heiman Carbon Monoxide Detector C1-S is listed at $29.99, while Heiman Interconnected CO Alarm C1-R is listed at $31.97. Heiman Carbon Monoxide Detector C1-S (better spec).
Who should buy Heiman Carbon Monoxide Detector C1-S?
Choose Heiman Carbon Monoxide Detector C1-S if your priority is price and rating and that matters more than connectivity.
Who should buy Heiman Interconnected CO Alarm C1-R?
Choose Heiman Interconnected CO Alarm C1-R if your priority is connectivity and integrations and that matters more than price.
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