Kidde 20SAR Hardwired Smoke Detector with AA Battery Backup

In this review of the Kidde 20SAR hardwired smoke detector, the bottom line is simple: this is a practical upgrade for homeowners who want a reliable ceiling-mounted alarm with battery backup and interconnect capability. It is aimed at families and landlords who need a device that meets current safety standards and reduces nuisance triggers from cooking. The reviewer found the unit straightforward to install in typical 120V ceiling wiring, appreciated the included AA backup batteries, and valued the clear LED status lights that make it easy to verify operation at a glance.

Key Features

• Hardwired with battery backup: Uses 120V AC wiring for continuous power while two included AA batteries provide reliable backup during outages.
• Enhanced sensing technology: Designed to reduce false alarms often caused by cooking while still detecting real smoke events quickly.
• Interconnect capability: When one alarm detects smoke, all interconnected units sound so occupants in other rooms are alerted immediately.
• LED warning light indicators: Green, amber, and red LEDs clearly communicate normal operation, errors, and smoke detection without guesswork.
• Test and hush button: Built-in test and silence functions make weekly checks easy and allow temporary silencing of nuisance alarms.
• Self-testing components: Internal self-tests help ensure the alarm is functioning, supplementing weekly manual push-button tests.

Who It's For

The Kidde 20SAR is best for homeowners, renters with permission to hardwire, and property managers who want a code-minded alarm that pairs AC power with replaceable AA backup batteries. It suits living rooms, hallways, bedrooms, and kitchens where reduced nuisance alarms and a visible status light are helpful.

People who want a purely wireless battery-only solution or who need specialized interconnect options beyond compatible Kidde models should look elsewhere. Also, anyone uncomfortable with ceiling wiring should hire an electrician rather than DIY the hardwired connection.

Pros & Cons

Pros

• Includes 2 AA battery backup so the alarm remains active during power loss.
• Interconnect feature increases household safety by sounding all linked alarms together.
• LED indicators and a test/hush button make operation and troubleshooting straightforward.
• Enhanced sensing helps reduce false alarms from common cooking smoke.

Cons

• Some users report mixed experiences with wiring compatibility and night-time false triggers on specific installs, so wiring and model matching matter.
• Interconnect compatibility depends on other Kidde models and may require checking the user guide before expanding a system.

Specifications

Model	20SAR
Power	120V AC hardwired with 2 AA battery backup (included)
Alarm sound	85-decibel alarm (3 long beeps) with flashing red LED
Size	5 in diameter
Standards	Meets UL 217 9th Edition and FCC standards
Interconnect	Yes, compatible with select Kidde models (see User Guide)
Warranty	10-year limited warranty starting when powered on

Our Verdict

The Kidde 20SAR is a solid value for anyone upgrading to a hardwired smoke alarm with battery backup and interconnect capability. It balances reliable detection, reduced nuisance alarms, and clear LED status indicators, making it a practical choice for most homes and rental units provided wiring and model compatibility are confirmed.

Frequently Asked Questions

Does this alarm work during a power outage?
The unit runs on 120V AC and continues operating on the two included AA alkaline batteries during a power loss.

Will it trigger other alarms in the house?
Yes, it is interconnectable so when compatible Kidde alarms detect smoke, they will all sound together; check the User Guide for compatibility details.

How often should the alarm be tested?
Perform a manual push-button test once per week; the alarm also has internal self-testing components but weekly tests are still recommended.