Heiman S1-R Review: A Mini Smoke Alarm That Links Wirelessly Across the Whole Home
The Heiman S1-R is a compact battery-powered photoelectric smoke alarm certified to UL 217 10th Edition that interconnects wirelessly with other Heiman RF alarms, so every unit sounds when one detects smoke. It needs no wiring, Wi-Fi or hub to do that, which makes it an easy whole-home upgrade for renters and older houses. Phone alerts and smart home links require the separate Heiman WS3GW-R gateway, and there is no Matter, Alexa or Apple Home support. At a budget-friendly price it is a simple way to add interlinked smoke protection.
- Renters
- Multi-level homes
- Budget buyers
- Retrofits without wiring
One alarm per floor, plus one per bedroom.
Buy on Amazon USACheck pricePros
- Dual-beam photoelectric sensor, UL 217 10th Edition
- Wireless 915 MHz interlink with other Heiman smoke and CO alarms
- Tiny, tool-free magnetic or screw mounting
- Battery rated for about 8.3 years
- Optional gateway adds app alerts, Google Home, SmartThings and Home Assistant
Cons
- Smart features require the separate Heiman gateway
- No Matter, Alexa or Apple Home support
- Detects smoke only, not carbon monoxide
- No display
Who is the Heiman S1-R for?
It suits homes that need smoke alarms that talk to each other but have no interconnect wiring: older houses, apartments, rentals and dorms. It mounts in minutes with screws or magnetic adhesive pads, runs on a CR123A lithium battery that Heiman rates for about 8.3 years, and is small enough to disappear on a bedroom ceiling.
What the Heiman S1-R offers
The dual-beam photoelectric chamber sizes smoke particles, which helps it respond to smoldering fires while filtering out steam and cooking fumes, and it is certified to the UL 217 10th Edition standard that added cooking nuisance tests. The 915 MHz radio links it with other Heiman RF alarms, including the C1-R carbon monoxide alarm, up to 800 ft in open areas according to Heiman, and alarms can be split into separate groups. It sounds an 85 dB buzzer, runs continuous self-monitoring and warns when the battery runs low.
What to know before you buy
Out of the box the S1-R is an interconnected alarm, not a connected one: it has no app, no Wi-Fi and no Matter radio. Push notifications, remote silencing and links to Google Home, SmartThings or Home Assistant need the Heiman WS3GW-R gateway, bought separately or in a kit. Alexa and Apple Home are not supported, it has no display, and it detects smoke only, so a separate CO alarm is still needed near fuel-burning appliances.
Is the Heiman S1-R worth it?
For whole-home interlinked smoke protection without an electrician it is good value: modern photoelectric sensing, a long battery rating and a network you can grow with Heiman RF smoke and CO alarms. Buyers who want alerts in Apple Home or Alexa should choose a Matter model such as the Heiman S1-M instead.
Frequently asked questions
Does the Heiman S1-R connect to Wi-Fi or an app?
Not by itself. The alarms interconnect with each other over a 915 MHz radio. For phone alerts and smart home integrations you add the Heiman WS3GW-R gateway, which joins a 2.4 GHz Wi-Fi network.
Can the Heiman S1-R interconnect with carbon monoxide alarms?
Yes. It links with other Heiman RF alarms such as the C1-R CO alarm, so any hazard sets off every linked unit.
Does the Heiman S1-R work with Alexa or Apple Home?
No. It has no Matter radio and neither platform supports it. Through the Heiman gateway it can reach Google Home, SmartThings and Home Assistant.
What battery does the Heiman S1-R use?
A CR123A lithium battery that Heiman rates for about 8.3 years on this model. The alarm chirps when the battery runs low.


