Winner
10% OFF
Prime exclusive deal$35.99
$39.99
Join Prime to buy it at $35.99
Updated October 2026
Data from the official Heiman and X-Sense sites.
2026 verdict
Heiman Smoke and CO Alarm HM-636THS beats X-Sense Wi-Fi Carbon Monoxide Alarm in 2026, with its clearest edge on warranty, battery life, and sensors.
It has the clearer edge on warranty, battery life, and sensors, and it stays ahead on alerts and tests itself. You should still consider X-Sense Wi-Fi Carbon Monoxide Alarm if price, rating, and connectivity matter more than raw overall balance. Overall, Heiman Smoke and CO Alarm HM-636THS makes more sense for most people.
vs
Works with
Connectivity
- Wi-Fi 2.4 GHz
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| Feature | Heiman Smoke and CO Alarm HM-636THS | X-Sense Wi-Fi Carbon Monoxide Alarm | Winner |
|---|---|---|---|
| Price | $35.99 | £30.59 | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Rating | 4.4 | 4.6 | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Warranty | 10 years | 5 years | Heiman Smoke and CO Alarm HM-636THS |
| Battery Life | 10 years | 1 year | Heiman Smoke and CO Alarm HM-636THS |
| Connectivity | None | 2.4 GHz WiFi | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Integrations | None | Home Assistant | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Screen | NO | YES | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Sensors | Smoke, CO | CO | Heiman Smoke and CO Alarm HM-636THS |
| Alerts | Fire Alerts, CO Alerts, Low Battery Alerts | CO Alerts, Low Battery Alerts | Heiman Smoke and CO Alarm HM-636THS |
| Built-in Light | NO | YES | X-Sense Wi-Fi Carbon Monoxide Alarm |
| Tests Itself | YES | NO | Heiman Smoke and CO Alarm HM-636THS |
| Steam Check | YES | NO | Heiman Smoke and CO Alarm HM-636THS |
Winner
10% OFF
Prime exclusive deal$35.99
$39.99
- + Warranty: 10 years
- + Battery Life: 10 years
- + Sensors: Smoke, CO
- - Price: $35.99 vs £30.59
- - Rating: 4.4 vs 4.6
15% OFF
£30.59
£35.99
- + Price: £30.59
- + Rating: 4.6
- + Connectivity: 2.4 GHz WiFi
- - Warranty: 5 years vs 10 years
- - Battery Life: 1 year vs 10 years
Frequently Asked Questions
Which is better overall: Heiman Smoke and CO Alarm HM-636THS or X-Sense Wi-Fi Carbon Monoxide Alarm?
Heiman Smoke and CO Alarm HM-636THS has the stronger overall profile in this comparison, especially for warranty, battery life, and sensors.
What is the biggest difference between Heiman Smoke and CO Alarm HM-636THS and X-Sense Wi-Fi Carbon Monoxide Alarm?
Price is one of the clearest differences: Heiman Smoke and CO Alarm HM-636THS lists $35.99, while X-Sense Wi-Fi Carbon Monoxide Alarm lists £30.59.
Which one looks better on price?
Heiman Smoke and CO Alarm HM-636THS is listed at $35.99, while X-Sense Wi-Fi Carbon Monoxide Alarm is listed at £30.59. X-Sense Wi-Fi Carbon Monoxide Alarm (better spec).
Who should buy Heiman Smoke and CO Alarm HM-636THS?
Choose Heiman Smoke and CO Alarm HM-636THS if your priority is warranty and battery life and that matters more than price.
Who should buy X-Sense Wi-Fi Carbon Monoxide Alarm?
Choose X-Sense Wi-Fi Carbon Monoxide Alarm if your priority is price and rating and that matters more than warranty.
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