Kidde 30CUAR Hardwired Smoke & CO Detector, 2 Pack
- 2 alarms, smoke and carbon monoxide in each
- 120V AC hardwired, 2 AA alkaline backup included
- Photoelectric smoke, electrochemical CO
- 85-decibel alarm, 3 LED status lights
- UL 217 9th Edition, UL 2034 4th Edition, FCC, CSFM
- 5-inch design, twist-and-click bracket
- 10-year limited warranty, end-of-life alert
Updated 3 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A two-pack of hardwired combination smoke and CO alarms with AA battery backup, status lights and interconnect for bedrooms and hallways. The AA backup batteries need regular replacement.
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ASIN: B0DDW7NL1KModel: 30CUAR
Overview
Hallways outside bedrooms, living rooms and kitchens are where these Kidde combination alarms go, each sensing smoke and carbon monoxide from one ceiling spot. They run on household wiring with AA backup batteries and mount with a twist-and-click bracket.
Two hazards covered by each unit is the reason to buy, halving the number of devices needed on every level. Status lights and a test and hush button make the alarms easy to read and manage. The limit is battery upkeep, since the AA backups need swapping on a schedule.
Who it's for
Families with gas heat, stoves or an attached garage get smoke and CO protection in each ceiling unit. Homes without alarm wiring, or owners who never want to change batteries, should choose a sealed battery model.
Pros and cons
- Smoke and CO in one unit
- Battery backup during outages
- Three color status lights
- Test and hush button
- AA backups need regular replacement
- Requires existing hardwiring
- Interconnect options vary by model
- Weekly manual test still advised
Performance notes
Smoke is read by a photoelectric chamber while a separate electrochemical cell measures carbon monoxide, so each hazard has its own sensor. Self-testing checks internal components, but a weekly button test confirms the horn works. Interconnected units sound together, which matters when the alarm starts far from bedrooms.
Specifications
| Brand | Kidde |
|---|---|
| Model | 30CUAR |
| Dimensions & fit | |
| Item Dimensions D X W X H | 1.88"D x 5"W x 5"H |
| Item Weight | 12.8 ounces |
| Capacity & performance | |
| Upper Temperature Rating | 100 °F |
| Power & efficiency | |
| Power Source | Corded Electric |
| Construction & materials | |
| Color | White |
| Enclosure Material | Plastic |
| Included components | |
| Unit Count | 2 Count |
| Warranty & support | |
| Manufacturer Warranty Description | 10-year Limited Warranty |
| Other details | |
| BuiltIn Media | AA batteries, Mounting Hardware, Two Alarm, User Guide |
| Item Type Name | Smoke and Carbon Monoxide Alarm |
| Mfr Part Number | 21032848 |
| Operating Humidity | 10 to 95% relative humidity (RH), non-condensing |
| Product Style | 9th Edition |
| Sensor Type | Photoelectric, Electrochemical |
Frequently asked questions
Is the Kidde 30CUAR a battery-only alarm?
No. It runs on 120V AC wiring installed in the ceiling, and the 2 AA alkaline batteries are backup only.
How often do I replace batteries in the Kidde 30CUAR?
Kidde says to replace the batteries every 6 months or when the alarm sounds a low battery chirp.
How do I know when to replace the Kidde 30CUAR?
It beeps an end-of-life notification at the end of its 10-year lifespan.
What do the Kidde 30CUAR lights mean?
Green is normal operation, amber is an operating error, and red means smoke or carbon monoxide is detected.