Smoke & CO Detectors · Head to head

First Alert SC5 Battery Smart Smoke & CO Alarm vs Heiman HS1SA Series Smoke Alarm

Full Smart Smoke & CO Detectors comparison in 2026

Data from Amazon and official First Alert and Heiman sites.
2026 verdict
First Alert SC5 Battery Smart Smoke & CO Alarm is the more complete option versus Heiman HS1SA Series Smoke Alarm in 2026, helped most by sensors, alerts, and steam check. It separates itself most clearly on sensors, alerts, and steam check, while still looking better on its broader overall balance. Heiman HS1SA Series Smoke Alarm is the better fit only for buyers who prioritize price, rating, and built-in light above everything else here. As a general recommendation, First Alert SC5 Battery Smart Smoke & CO Alarm comes out on top.
FeatureFirst Alert SC5 Battery Smart Smoke & CO AlarmHeiman HS1SA Series Smoke AlarmWinner
Price$129.98£16.14Heiman HS1SA Series Smoke Alarm
Rating3.54.5Heiman HS1SA Series Smoke Alarm
SensorsSmoke, COSmokeFirst Alert SC5 Battery Smart Smoke & CO Alarm
AlertsFire Alerts, CO Alerts, Low Battery AlertsFire Alerts, Low Battery AlertsFirst Alert SC5 Battery Smart Smoke & CO Alarm
Built-in LightNOYESHeiman HS1SA Series Smoke Alarm
Steam CheckYESNOFirst Alert SC5 Battery Smart Smoke & CO Alarm
Connectivity2.4 GHz WiFiZigbeeTie
IntegrationsGoogle HomeHome AssistantTie
ScreenNONOTie
Built-in SirenYESYESTie
Tests ItselfNONOTie
PathlightNONOTie

Frequently Asked Questions (FAQ)

Which is better overall: First Alert SC5 Battery Smart Smoke & CO Alarm or Heiman HS1SA Series Smoke Alarm?
First Alert SC5 Battery Smart Smoke & CO Alarm has the stronger overall profile in this comparison, especially for sensors, alerts, and steam check.
What is the biggest difference between First Alert SC5 Battery Smart Smoke & CO Alarm and Heiman HS1SA Series Smoke Alarm?
Price is one of the clearest differences: First Alert SC5 Battery Smart Smoke & CO Alarm lists $129.98, while Heiman HS1SA Series Smoke Alarm lists £16.14.
Which one looks better on price?
Who should buy First Alert SC5 Battery Smart Smoke & CO Alarm?
Choose First Alert SC5 Battery Smart Smoke & CO Alarm if your priority is sensors and alerts and that matters more than price.
Who should buy Heiman HS1SA Series Smoke Alarm?
Choose Heiman HS1SA Series Smoke Alarm if your priority is price and rating and that matters more than sensors.
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