Winner
Updated October 2026
Data from Amazon and official Heiman and Kidde sites.
2026 verdict
In 2026, the recommendation leans toward Heiman HS1SA-E Zigbee Smoke Alarm over Kidde Smart Smoke + Indoor Air Quality Alarm, driven by price, rating, and integrations.
What pushes it ahead is price, rating, and integrations, and its broader overall balance keeps the advantage from looking narrow. Kidde Smart Smoke + Indoor Air Quality Alarm can still be the right pick, but only if sensors and alerts outweigh the wider strengths of Heiman HS1SA-E Zigbee Smoke Alarm. That is enough to make Heiman HS1SA-E Zigbee Smoke Alarm the better pick for most buyers.
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| Feature | Heiman HS1SA-E Zigbee Smoke Alarm | Kidde Smart Smoke + Indoor Air Quality Alarm | Winner |
|---|---|---|---|
| Price | €34.99 | $111.59 | Heiman HS1SA-E Zigbee Smoke Alarm |
| Rating | 4.5 | 3.3 | Heiman HS1SA-E Zigbee Smoke Alarm |
| Integrations | Samsung SmartThings, Home Assistant | Google Home, Home Assistant | Heiman HS1SA-E Zigbee Smoke Alarm |
| Sensors | Smoke | Smoke, Humidity, Air Quality | Kidde Smart Smoke + Indoor Air Quality Alarm |
| Alerts | Fire Alerts, Low Battery Alerts | Fire Alerts, Low Battery Alerts, Air Quality Alerts | Kidde Smart Smoke + Indoor Air Quality Alarm |
| Connectivity | Zigbee | 2.4 GHz WiFi | Tie |
| Screen | NO | NO | Tie |
| Built-in Siren | YES | YES | Tie |
| Built-in Light | YES | YES | Tie |
| Pathlight | NO | NO | Tie |
| Steam Check | NO | NO | Tie |
Winner
€34.99
- + Price: €34.99
- + Rating: 4.5
- + Integrations: Samsung SmartThings, Home Assistant
- - Sensors: Smoke vs Smoke, Humidity, Air Quality
- - Alerts: Fire Alerts, Low Battery Alerts vs Fire Alerts, Low Battery Alerts, Air Quality Alerts
$111.59
- + Sensors: Smoke, Humidity, Air Quality
- + Alerts: Fire Alerts, Low Battery Alerts, Air Quality Alerts
- - Price: $111.59 vs €34.99
- - Rating: 3.3 vs 4.5
Frequently Asked Questions
Which is better overall: Heiman HS1SA-E Zigbee Smoke Alarm or Kidde Smart Smoke + Indoor Air Quality Alarm?
Heiman HS1SA-E Zigbee Smoke Alarm has the stronger overall profile in this comparison, especially for price, rating, and integrations.
What is the biggest difference between Heiman HS1SA-E Zigbee Smoke Alarm and Kidde Smart Smoke + Indoor Air Quality Alarm?
Price is one of the clearest differences: Heiman HS1SA-E Zigbee Smoke Alarm lists €34.99, while Kidde Smart Smoke + Indoor Air Quality Alarm lists $111.59.
Which one looks better on price?
Heiman HS1SA-E Zigbee Smoke Alarm is listed at €34.99, while Kidde Smart Smoke + Indoor Air Quality Alarm is listed at $111.59. Heiman HS1SA-E Zigbee Smoke Alarm (better spec).
Who should buy Heiman HS1SA-E Zigbee Smoke Alarm?
Choose Heiman HS1SA-E Zigbee Smoke Alarm if your priority is price and rating and that matters more than sensors.
Who should buy Kidde Smart Smoke + Indoor Air Quality Alarm?
Choose Kidde Smart Smoke + Indoor Air Quality Alarm if your priority is sensors and alerts and that matters more than price.
Full comparison table
Compare all 25 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.
- 25 Smoke & CO Detectors
- 44 specs compared
- 41 filters
YoLinkPhotoelectric Smoke Alarm
HeimanMatter Smoke Detector S1-TM
$49.98
GoogleNest Protect (Wired)
$499.99
X-SenseWi-Fi CO Alarm
€39.99
X-SenseSC07-MR Smart Smoke & CO Alarm
- Heiman
HS1SA-E Zigbee Smoke Alarm
€34.99 
X-SenseWiFi Smoke & CO Detector
€59.18
X-SenseWi-Fi Smoke Alarm
€24.06
GoogleNest Protect (Battery)
ShellySmoke Alarm
12% OFF€59.99€52.54
EufySmoke Alarm E10
17% OFF$59.99$49.99
X-SenseXC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts
15% OFF
€35.99€30.59
HeimanInterconnected Smoke Alarm S1-R
$25.99
AqaraSmart Smoke Detector
11% OFF€44.99€39.99
KiddeSmart Smoke & CO Detector with Ring
$69.97
HeimanInterconnected CO Alarm C1-R
10% OFF$29.98$26.99
First AlertSC5 Battery Smart Smoke & CO Alarm
HeimanSmart CO Alarm
17% OFF$59.99$49.99
HeimanMatter Smoke Detector S1-M
$39.99
First AlertSMCO410 Smoke Detector & CO Alarm
$64.98
Door & Window SensorsHeimanWindow Door Alarm
4.0(149)
Gas DetectorsHeimanHS1CG Series Combustible Gas Sensor
Gas DetectorsHeimanWS2CG Series Combustible Gas Detector
Motion SensorsHeimanSmart Motion Sensor
3.2(32)
Motion SensorsHeimanWiFi Smart Motion Sensor
2.8(43)
SirensHeimanSmart Siren HS2WD series
$79.99- Smoke & CO DetectorsHeiman
HS1SA-E Zigbee Smoke Alarm
4.5(5,145)€34.99 - Smoke & CO DetectorsHeiman
Interconnected CO Alarm C1-R
4.1(25)10% OFF$29.98$26.99 - Smoke & CO DetectorsHeiman
Interconnected Smoke Alarm S1-R
4.4(68)$25.99 - Smoke & CO DetectorsHeiman
Matter Smoke Detector S1-M
3.6(78)$39.99 - Smoke & CO DetectorsHeiman
Matter Smoke Detector S1-TM
4.8(14)$49.98 - Smoke & CO DetectorsHeiman
Smart CO Alarm
3.7(21)17% OFF$59.99$49.99 
Vibration SensorsHeimanSmart Vibration Sensor HS1VS series
$14.90
Water Leak SensorsHeimanSmart Water Leakage Sensor
4.2(40)15% OFF$19.99$16.99
