• First Alert ZCOMBOA combination smoke and CO detector showing white circular design with test button and LED indicators
Professional installation available for a fee

2-in-1 smoke/fire & carbon monoxide alarm

Dual-sensor protection detects both smoke and carbon monoxide with distinct alarm sounds and lights to identify each threat type while minimizing false alarms.
Simple battery power:
installs in minutes with just two AA batteries. Low-battery alerts ensure you're never caught off guard when it's time to replace them.
First Alert ZCOMBOA detector with battery compartment open showing two AA batteries for wireless operation convenience
Stay connected anywhere:
wireless connectivity sends instant mobile alerts and emails when the alarm activates, keeping you informed whether you're home or away.
TELUS SmartHome+ mobile app displaying real-time safety alerts from First Alert ZCOMBOA detector via Z-Wave connection
TELUS SmartHome+ mobile app displaying real-time safety alerts from First Alert ZCOMBOA detector via Z-Wave connection
Quick installation:
mounts easily to any ceiling or wall with included hardware and a tamper-resistant design for reliable protection.



Manage and control your smart home and security devices in one app

Real-time alerts:
Get instant alerts directly to your phone the moment something happens at home. Whether a door or window opens or motion is detected, you'll be the first to know, giving you the power to respond immediately.

Tech specs

General
Manufacturer
First Alert
Part / Model
1044817 / ZCOMBOA
Size / Quantity
1
Type of Sensor
Electrochemical; Photoelectric
Mounting Type
Wall / Ceiling
Colour
White
Operating Environment
Indoor
Certifications
ULC STD S531-14, CSA 6.19-01

Installation

A SmartHome+ Hub mounted on a wooden wall.

The new SmartHome+ Hub is now available for all customers

The TELUS SmartHome+ Hub allows security sensors, such as Smoke/CO detectors, to connect to your system.
If you are an existing SmartHome+ customer with a panel (installed before December 10, 2025), you will need to replace it with our new Automation Hub. To begin this exchange, please call 1-855-255-8828.
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Frequently asked questions