Smoke & CO Detectors · Head to head

Heiman HS1SA Series Smoke Alarm vs Kidde Smart Smoke + Indoor Air Quality Alarm

Full Smart Smoke & CO Detectors comparison in 2026

Data from Amazon and official Heiman and Kidde sites.
2026 verdict
In 2026, the recommendation leans toward Kidde Smart Smoke + Indoor Air Quality Alarm over Heiman HS1SA Series Smoke Alarm, driven by sensors and alerts. What pushes it ahead is sensors and alerts, and its broader overall balance keeps the advantage from looking narrow. Heiman HS1SA Series Smoke Alarm can still be the right pick, but only if price and rating outweigh the wider strengths of Kidde Smart Smoke + Indoor Air Quality Alarm. That is enough to make Kidde Smart Smoke + Indoor Air Quality Alarm the better pick for most buyers.
vs
FeatureHeiman HS1SA Series Smoke AlarmKidde Smart Smoke + Indoor Air Quality AlarmWinner
Price£16.14$98.74Heiman HS1SA Series Smoke Alarm
Rating4.53.4Heiman HS1SA Series Smoke Alarm
SensorsSmokeSmoke, Humidity, Air QualityKidde Smart Smoke + Indoor Air Quality Alarm
AlertsFire Alerts, Low Battery AlertsFire Alerts, Low Battery Alerts, Air Quality AlertsKidde Smart Smoke + Indoor Air Quality Alarm
ConnectivityZigbee2.4 GHz WiFiTie
IntegrationsSamsung SmartThings, Home AssistantGoogle Home, AlexaTie
ScreenNONOTie
Built-in SirenYESYESTie
Built-in LightYESYESTie
Tests ItselfNONOTie
PathlightNONOTie
Steam CheckNONOTie

Frequently Asked Questions

Which is better overall: Heiman HS1SA Series Smoke Alarm or Kidde Smart Smoke + Indoor Air Quality Alarm?

Kidde Smart Smoke + Indoor Air Quality Alarm has the stronger overall profile in this comparison, especially for sensors and alerts.

What is the biggest difference between Heiman HS1SA Series Smoke Alarm and Kidde Smart Smoke + Indoor Air Quality Alarm?

Price is one of the clearest differences: Heiman HS1SA Series Smoke Alarm lists £16.14, while Kidde Smart Smoke + Indoor Air Quality Alarm lists $98.74.

Which one looks better on price?

Heiman HS1SA Series Smoke Alarm is listed at £16.14, while Kidde Smart Smoke + Indoor Air Quality Alarm is listed at $98.74. Heiman HS1SA Series Smoke Alarm (better spec).

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.

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.

More Smoke & CO Detectors

Top Smoke & CO Detectors to compare next

Compare Smart Smoke & CO alarms by power source, connectivity, sensors, alerts, display, integrations, automations, and safety features.

Compare Smoke & CO Detectors
Heiman

More Heiman products

A sharper look at other Heiman products worth comparing.

Explore Heiman
Kidde

More Kidde products

A sharper look at other Kidde products worth comparing.

Explore Kidde
Stay in the loop

Smart Home Deals & News straight to your inbox

Join the newsletter and get the best smart home deals and new releases in your inbox.

Your subscription could not be saved. Please try again.
Your subscription has been successful.

Smart Home Deals & News straight to your inbox

Join the newsletter and get the best smart home deals and new releases in your inbox.

Independent · Not sponsoredBrands never pay for placement or rankings. Affiliate commissions never influence our comparisons.
© 2026 Smart Home Compared
Search