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Kidde Smoke Detector Hardwired Comparison - April 2026
| 1 Best Choice  9.8Exceptional | 2  9.7Exceptional | 3  9.4Excellent | 4 Best Value  9.3Excellent | 5  9.0Excellent | 6  8.7Very Good | 7  8.6Very Good |
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ModelKidde Hardwired Smoke & Carbon Monoxide Detector, Battery Backup, Interconnectable, LED Warning Light Indicators | Model Kidde Hardwired Smoke Detector, AA Battery Backup, Interconnectable, LED Warning Light Indicators, 4 Pack | Model Kidde Hardwired Smoke Detector, 10-Year Battery Backup, Interconnectable, LED Warning Light Indicators, 4 Pack | Model First Alert BRK SMI100-AC Hardwired Smoke Detector with Battery Backup, 6-Pack | Model Kidde Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup Smoke Alarm, Interconnectable, LED Warning Light Indicators, 2 Pack | Model Kidde Hardwired Smoke Detector, 10-Year Battery Backup, Interconnectable, LED Warning Light Indicators, 20SA10 | Model Kidde Hardwired Smoke & Carbon Monoxide Detector, 10-Year Battery Backup, Voice Alerts, Interconnectable LED Warning Light Indicators |
BrandKidde | Brand Kidde | Brand Kidde | Brand First Alert | Brand Kidde | Brand Kidde | Brand Kidde |
Reviews | Reviews | Reviews  | Reviews | Reviews | Reviews  | Reviews |
Tech Specs | ||||||
color White | color White | color ‎White | color White | color White | color White | color White |
alarm Audible | alarm Smoke Alarm | alarm ‎Smoke Alarm | alarm Audible | alarm Smoke and Carbon Monoxide Alarm | alarm Smoke Detector | alarm Smoke and Carbon Monoxide Detector |
item weight 6.4 ounces | item weight 12.8 ounces | item weight ‎12.8 ounces | item weight 9.6 ounces | item weight 12.8 ounces | item weight 0.59 Pounds | item weight 0.66 Pounds |
power source Hardwired | power source Hardwired | power source ‎Hardwired | power source Battery Powered | power source Hardwired | power source Hardwired | power source Hardwired |
sensor type Ionization | sensor type Photoelectric | sensor type ‎Photoelectric | sensor type Ionization | sensor type Photoelectric, Electrochemical | sensor type Photoelectric | sensor type Photoelectric, Electrochemical |
operating humidity 10 to 95 relative humidity, non-condensing | operating humidity up to 95 relative humidity RH , non-condensing | operating humidity ‎up to 95% relative humidity (RH), non-condensing | operating humidity - | operating humidity 10 to 95 relative humidity RH , non-condensing | operating humidity Up to 95 relative humidity RH , non-condensing | operating humidity 10 to 95 relative humidity RH , non-condensing |
upper temperature range- | upper temperature range 100 Degrees Fahrenheit | upper temperature range - | upper temperature range - | upper temperature range 100 Degrees Fahrenheit | upper temperature range 100 Degrees Fahrenheit | upper temperature range 100 Degrees Fahrenheit |
item dimensions d x w x h- | item dimensions d x w x h 1.88D x 5W x 5H | item dimensions d x w x h - | item dimensions d x w x h - | item dimensions d x w x h 1.88D x 5W x 5H | item dimensions d x w x h 1.88D x 5W x 5H | item dimensions d x w x h 1.88D x 5W x 5H |
brand name- | brand name Kidde | brand name - | brand name - | brand name Kidde | brand name Kidde | brand name Kidde |
material type- | material type Plastic | material type - | material type - | material type Plastic | material type Plastic | material type Plastic |
batteries included Yes | batteries included - | batteries included ‎Yes | batteries included Yes | batteries included - | batteries included - | batteries included - |
included components Alarm | included components - | included components ‎Four Alarms, Mounting Hardware, User Guide | included components Mounting brackets with hardware 6 , 9-volt battery 6 , First Alert BRK 9120B Hardwired Smoke Alarms with Battery Backup 6 | included components - | included components - | included components - |
battery cell type Alkaline | battery cell type - | battery cell type ‎Lithium Metal | battery cell type Alkaline | battery cell type - | battery cell type - | battery cell type - |
product dimensions 1.8D x 5.6W x 5.6H | product dimensions - | product dimensions ‎1.88"D x 5"W x 5"H | product dimensions 2.2D x 5.6W x 5.6H | product dimensions - | product dimensions - | product dimensions - |
batteries 2 AA batteries required. included | batteries - | batteries ‎1 CR2 batteries required. (included) | batteries 1 9V batteries required. included | batteries - | batteries - | batteries - |
item package quantity 1 | item package quantity - | item package quantity ‎1 | item package quantity 1 | item package quantity - | item package quantity - | item package quantity - |
style Previous Model | style - | style ‎Modern | style Hardwired | style - | style - | style - |
batteries required Yes | batteries required - | batteries required ‎Yes | batteries required Yes | batteries required - | batteries required - | batteries required - |
style name- | style name 9th Edition | style name - | style name - | style name 9th Edition | style name - | style name Modern |
Review | Review - | Review - | Review - | Review - | Review - | Review - |
Available On  | Available On  | Available On | Available On | Available On | Available On | Available On |
Our Top 3 Picks
Here are the top 3 recommended products with more information to help you find the right product for you
9.8
1KiddeKidde Hardwired Smoke & Carbon Monoxide Detector, Battery Backup, Interconnectable, LED Warning Light Indicators
Why we love it
This product can help protect you from both fires and carbon monoxide poisoning.
It is UL certified and has a 10 year limited warranty.
It can interconnect with other Kidde brand hardwired smoke alarms.
Main highlights- UL Certified, 10-year limited warranty
- Test-Hush Feature - silences the unit for approximately 9 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling
- Protects during a power failure - combo smoke and CO detector operates on a 120VAC power source with 2-AA battery backup
- Meets safety standards set by Underwriters Laboratories (UL) and interconnects with other KN-COSM-IBA models
- Ionization sensing technology - hardwired smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire
- Interconnects: Up to 24 Kidde devices (of which 18 can be initiating)
- Fire & CO Detector in 1 unit with alert modes, LED lights, & voice alarm, that states, "Fire! Fire!", "Warning! Carbon Monoxide!", or "Low Battery!"
- 120V AC, All Kidde brand hard wired smoke alarms are interconnectable with the KN-COSM-IBA
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9.7
2Kidde17% Off
Kidde Hardwired Smoke Detector, AA Battery Backup, Interconnectable, LED Warning Light Indicators, 4 Pack
Main highlights- TEST & HUSH BUTTON: Makes it easy to test the 5-inch smoke detector and silence false alarms, should they occur.
- SELF-TESTING ALARM: Internal components ensure alarm is always operating as expected. Not a substitute for a manual push test, perform a button test once per week to verify alarm operation.
- INTERCONNECT CAPABILITY: When one alarm sounds, they all sound, so you can get out faster. (Different models offer different interconnection options and requirements. See User Guide for more info.)
- HARDWIRED & 2 AA BATTERY BACKUP (Included): Operates on 120V AC wiring (installed in the ceiling) with 2 AA alkaline batteries that provide battery backup coverage during power outages.
- ENHANCED SENSING TECHNOLOGY: Reduces false alarms often caused by cooking. Comprehensively tested to meet the latest UL standards, meets UL 217 9th Edition & FCC standards.
- DETECTS SMOKE: Sounds a loud 85-decibel alarm when smoke is detected - 3 long beeps with red LED light flashing in time, repeating.
- 3 LED NOTIFICATIONS: LED lights indicate alarm status, green = normal operation, amber = operating error, red = smoke detected.
- 10-YEAR LIMITED WARRANTY: Warranty begins when the alarm is powered on. If that date is unknown, it should be assumed that alarms should be replaced.
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9.4
3Kidde
Kidde Hardwired Smoke Detector, 10-Year Battery Backup, Interconnectable, LED Warning Light Indicators, 4 Pack
Why we love it
10-year battery, no frequent changes.
Reduces false alarms from cooking.
Easy installation with clear indicators.
Main highlights- SELF-TESTING ALARM: Internal components ensure alarm is always operating as expected. Not a substitute for a manual push test, perform a button test once per week to verify alarm operation.
- INTERCONNECT CAPABILITY: When one alarm sounds, they all sound, so you can get out faster. (Different models offer different interconnection options and requirements. See User Guide for more info.)
- HARDWIRED & 10-YEAR BATTERY BACKUP: Operates on 120V AC wiring (installed in the ceiling). No battery changes for 10 years & saves up to $40 over the life of the detector.
- ENHANCED SENSING TECHNOLOGY: Reduces false alarms often caused by cooking. Comprehensively tested to meet the latest UL standards, meets UL 217 9th Edition & FCC standards.
- DETECTS SMOKE: Sounds a loud 85-decibel alarm when smoke is detected - 3 long beeps with red LED light flashing in time, repeating.
Our ranking system
At bestchoice.com, our team curates a selection of top products from a vast array available online, using a sophisticated ranking system based on carefully defined criteria.While traditional hands-on testing has its merits, our use of AI technology offers distinct advantages. AI allows us to process and analyze vast amounts of data from multiple sources, providing a comprehensive view that goes beyond what manual testing can achieve. This approach enables us to deliver insights that are aligned with current trends and consumer preferences, ensuring our reviews are both relevant and up-to-date.
Features
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Consumer Reviews
We aggregate and evaluate consumer feedback from across the internet, giving weight to ratings and reviews that reflect the most reliable insights. AI enhances this process by filtering and prioritizing data, offering a balanced view without the need for direct personal endorsements.
Popularity
Our system also considers the popularity of products, analyzing factors such as market presence, reputation, and user satisfaction. By leveraging AI, we capture a comprehensive picture of a product's standing in the market, which may not always be evident through traditional testing.
Value for money
AI allows us to compare products based on attributes like price, specifications, and user feedback, helping to determine their value for money. This data-driven approach offers an efficient and reliable way to assess how products stack up against one another in terms of cost-effectiveness.
