Winner
10% OFF
$35.98
$39.99
Updated October 2026
Data from the official Heiman and YoLink sites.
2026 verdict
Across the 2026 comparison, Heiman Smoke and CO Alarm HM-636THS earns the nod over YoLink Photoelectric Smoke Alarm on the strength of price, warranty, and battery life.
It builds its lead on price, warranty, and battery life, then backs it up with a stronger showing on sensors and alerts. YoLink Photoelectric Smoke Alarm still makes sense if rating, connectivity, and integrations are your priority, but most buyers should still lean toward Heiman Smoke and CO Alarm HM-636THS. That makes Heiman Smoke and CO Alarm HM-636THS the clearer recommendation in 2026.
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| Feature | Heiman Smoke and CO Alarm HM-636THS | YoLink Photoelectric Smoke Alarm | Winner |
|---|---|---|---|
| Price | $35.98 | $49.99 | Heiman Smoke and CO Alarm HM-636THS |
| Rating | 4.4 | 5.0 | YoLink Photoelectric Smoke Alarm |
| Warranty | 10 years | 2 years | Heiman Smoke and CO Alarm HM-636THS |
| Battery Life | 10 years | 5 years | Heiman Smoke and CO Alarm HM-636THS |
| Connectivity | None | Other | YoLink Photoelectric Smoke Alarm |
| Integrations | None | Home Assistant | YoLink Photoelectric Smoke Alarm |
| Sensors | Smoke, CO | Smoke | Heiman Smoke and CO Alarm HM-636THS |
| Alerts | Fire Alerts, CO Alerts, Low Battery Alerts | Fire Alerts, Low Battery Alerts | Heiman Smoke and CO Alarm HM-636THS |
| Steam Check | YES | NO | Heiman Smoke and CO Alarm HM-636THS |
| Screen | NO | NO | Tie |
| Built-in Siren | YES | YES | Tie |
| Built-in Light | NO | NO | Tie |
Winner
10% OFF
$35.98
$39.99
- + Price: $35.98
- + Warranty: 10 years
- + Battery Life: 10 years
- - Rating: 4.4 vs 5.0
- - Connectivity: None vs Other
$49.99
- + Rating: 5.0
- + Connectivity: Other
- + Integrations: Home Assistant
- - Price: $49.99 vs $35.98
- - Warranty: 2 years vs 10 years
Frequently Asked Questions
Which is better overall: Heiman Smoke and CO Alarm HM-636THS or YoLink Photoelectric Smoke Alarm?
Heiman Smoke and CO Alarm HM-636THS has the stronger overall profile in this comparison, especially for price, warranty, and battery life.
What is the biggest difference between Heiman Smoke and CO Alarm HM-636THS and YoLink Photoelectric Smoke Alarm?
Price is one of the clearest differences: Heiman Smoke and CO Alarm HM-636THS lists $35.98, while YoLink Photoelectric Smoke Alarm lists $49.99.
Which one looks better on price?
Heiman Smoke and CO Alarm HM-636THS is listed at $35.98, while YoLink Photoelectric Smoke Alarm is listed at $49.99. Heiman Smoke and CO Alarm HM-636THS (better spec).
Who should buy Heiman Smoke and CO Alarm HM-636THS?
Choose Heiman Smoke and CO Alarm HM-636THS if your priority is price and warranty and that matters more than rating.
Who should buy YoLink Photoelectric Smoke Alarm?
Choose YoLink Photoelectric Smoke Alarm if your priority is rating and connectivity and that matters more than price.
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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
- Smoke & CO Detectors
Photoelectric Smoke Alarm
- Smoke & CO Detectors
WiFi Smoke & CO Detector
- Smoke & CO Detectors
Nest Protect (Wired)
- 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
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
Smoke and CO Alarm HM-636THS
- Smoke & CO Detectors
Interconnected Smoke Alarm S1-R
- Smoke & CO Detectors
SD19-MN Interconnected Smart Smoke Alarm
- 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 HM-636PHS
- Smoke & CO Detectors
Smoke Alarm E10
- Smoke & CO Detectors
Interconnected CO Alarm C1-R
- Smoke & CO Detectors
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
- Cameras
Uno
- Door & Window Sensors
LoRa Smart Outdoor Contact Sensor
- Door & Window Sensors
Solar Outdoor Door Sensor
- Hubs
Hub
- Motion Sensors
Indoor Motion Sensor RT
- Motion Sensors
LoRa 1/4 Mile Motion Sensor
- Plugs
Mini Plug
- Plugs
Smart Outdoor Energy Plug
- Smoke & CO Detectors
Photoelectric Smoke Alarm
- Temperature & Humidity Sensors
Smart Wireless Thermometer Hygrometer
- Water Leak Sensors
Water Leak Sensor 1
- Water Leak Sensors
Water Leak Sensor 4
- Water Shutoff Valves
FlowSmart All-in-One Water Meter & Shutoff
- Water Shutoff Valves
Valve Controller 2 with EVO Valve Operator
- Water Timers
Smart Sprinkler Timer