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Hardwired Smoke Detectors Comparison - May 2026
| 1 Best Choice  9.8Exceptional | 2  9.6Exceptional | 3  9.5Excellent | 4 Best Value  9.4Excellent | 5  9.1Excellent | 6  8.8Very Good | 7  8.5Good |
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ModelFIRST ALERT BRK SC9120B-3 Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, White, Pack of 3 | Model First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 6-Pack, White | Model Kidde Hardwired Smoke Detector, AA Battery Backup, Interconnectable, LED Warning Light Indicators, 4 Pack | Model First Alert BRK SMI100-AC Hardwired Smoke Detector with Battery Backup, 6-Pack | Model BRK First Alert 9120BFF/ SMI100-AC Smoke Detector, Hardwired Alarm with Battery Backup, White, 1-Pack | Model First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack | Model Kidde Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup Smoke Alarm, Interconnectable, LED Warning Light Indicators, 2 Pack |
BrandFirst Alert | Brand First Alert | Brand Kidde | Brand First Alert | Brand BRK | Brand First Alert | Brand Kidde |
Reviews | Reviews | Reviews  | Reviews | Reviews | Reviews  | Reviews |
Features | ||||||
Worth the money 8.4 | Worth the money  9.4 | Worth the money 9.3 | Worth the money 9.1 | Worth the money 9.4 | Worth the money 9.4 | Worth the money 8.6 |
Easy installation 9.6 | Easy installation 9.6 | Easy installation 9.4 | Easy installation 9.3 | Easy installation 9.6 | Easy installation 9.6 | Easy installation 8.9 |
Battery duration 9.1 | Battery duration 9.1 | Battery duration 9.1 | Battery duration 8.9 | Battery duration 9.1 | Battery duration 9.1 | Battery duration 8.4 |
Instruction 9.3 | Instruction 9.4 | Instruction 9.3 | Instruction 9.1 | Instruction 9.4 | Instruction 9.4 | Instruction 8.6 |
Tech Specs | ||||||
color White | color White | color White | color White | color ‎White | color ‎White | color White |
item weight 11.2 ounces | item weight 3.48 pounds | item weight 12.8 ounces | item weight 9.6 ounces | item weight ‎0.8 ounces | item weight ‎9.6 ounces | item weight 12.8 ounces |
power source Battery Powered, Hardwired | power source Battery Powered | power source Hardwired | power source Battery Powered | power source ‎Battery Powered | power source ‎Battery Powered | power source Hardwired |
alarm Audible | alarm Audible | alarm Smoke Alarm | alarm Audible | alarm ‎Audible | alarm ‎Smoke Alarm | alarm Smoke and Carbon Monoxide Alarm |
sensor type electrochemical, ionization | sensor type Ionization | sensor type Photoelectric | sensor type Ionization | sensor type ‎Ionization | sensor type ‎Ionization | sensor type Photoelectric, Electrochemical |
product dimensions 1.9D x 5.6W x 5.6H | product dimensions 1.9D x 5.6W x 5.6H | product dimensions - | product dimensions 2.2D x 5.6W x 5.6H | product dimensions ‎5.6"D x 5.6"W x 2.2"H | product dimensions ‎5.6"D x 5.6"W x 1"H | product dimensions - |
batteries 2 AA batteries required. included | batteries 1 9V batteries required. included | batteries - | batteries 1 9V batteries required. included | batteries ‎1 9V batteries required. (included) | batteries ‎1 9V batteries required. (included) | batteries - |
batteries included Yes | batteries included Yes | batteries included - | batteries included Yes | batteries included ‎Yes | batteries included ‎Yes | batteries included - |
included components First Alert BRK SC-9120B Hardwired Combination Smoke and Carbon Monoxide Alarms with Battery Backup 3 , Mounting brackets 3 , 9-volt battery 3 | included components First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 6-Pack | included components - | included components Mounting brackets with hardware 6 , 9-volt battery 6 , First Alert BRK 9120B Hardwired Smoke Alarms with Battery Backup 6 | included components ‎smoke detector, batteries, mount | included components ‎Easy Adapter Plug, 9V Alkaline Battery | included components - |
item package quantity 1 | item package quantity 1 | item package quantity - | item package quantity 1 | item package quantity ‎1 | item package quantity ‎1 | item package quantity - |
style Hardwired | style 9120B | style - | style Hardwired | style ‎9120BFF | style ‎Precision Detection | style - |
battery cell type Alkaline | battery cell type Zinc Carbon | battery cell type - | battery cell type Alkaline | battery cell type ‎Alkaline | battery cell type ‎Alkaline | battery cell type - |
batteries required Yes | batteries required Yes | batteries required - | batteries required Yes | batteries required ‎Yes | batteries required ‎Yes | batteries required - |
pattern Detector | pattern Filter | pattern - | pattern - | pattern ‎Filter | pattern ‎SMI100-AC | pattern - |
size 3-Pack | size 6-Pack | size - | size - | size ‎1-Pack | size ‎1-Pack | size - |
operating humidity- | operating humidity - | operating humidity up to 95 relative humidity RH , non-condensing | operating humidity - | operating humidity ‎10-95% RH | operating humidity - | operating humidity 10 to 95 relative humidity RH , non-condensing |
number of items- | number of items - | number of items - | number of items 6 | number of items ‎1 | number of items ‎1 | number of items - |
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
1First Alert32% OffFIRST ALERT BRK SC9120B-3 Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, White, Pack of 3
9.6 Easy installation9.3 Instruction9.1 Battery DurationWhy we love it
Battery backup for constant monitoring.
Electrochemical ionization sensors.
Lights 85 dB siren for warning.
-
9.6
2First Alert
First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 6-Pack, White
9.6 Easy installation9.4 worth the money9.4 InstructionWhy we love it
Reliable detection of fast flaming fires.
Interconnects with other alarms for comprehensive coverage.
Easy installation with user-friendly features.
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9.5
3Kidde14% Off
Kidde Hardwired Smoke Detector, AA Battery Backup, Interconnectable, LED Warning Light Indicators, 4 Pack
9.4 Easy installation9.3 worth the money9.3 InstructionMain 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.
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
Our AI-driven analysis examines key attributes, capabilities, and other critical factors tailored to each product category. This method allows us to assess effectiveness from various perspectives, ensuring a well-rounded evaluation.
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.
