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Hard Wired Smoke Detectors Comparison - April 2026
| 1 Best Choice  9.8Exceptional | 2  9.6Exceptional | 3 Best Value  9.5Excellent | 4  9.4Excellent | 5  9.1Excellent | 6  8.8Very Good | 7  8.6Very Good |
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ModelFirst Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup - 3 Pack | Model First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 6-Pack | Model First Alert BRK SMI100-AC Hardwired Smoke Detector with Battery Backup, 6-Pack | Model Kidde Hardwired Smoke Detector, AA Battery Backup, Interconnectable, LED Warning Light Indicators, 4 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 Smoke Detector, Hardwired with 10-Year Battery Backup, Interconnectable, LED Status Lights, 85 dB Alarm, 5-inches |
BrandFirst Alert | Brand First Alert | Brand First Alert | Brand Kidde | Brand BRK | Brand First Alert | Brand Kidde |
Reviews | Reviews | Reviews  | Reviews | Reviews | Reviews  | Reviews |
Features | ||||||
Easy installation 9.4 | Easy installation 9.6 | Easy installation 9.4 | Easy installation 9.3 | Easy installation 9.6 | Easy installation 9.6 | Easy installation 8.9 |
Worth the money 9.3 | 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 |
Instruction 9.3 | Instruction 9.4 | Instruction 9.3 | Instruction 9.1 | Instruction 9.4 | Instruction 9.4 | Instruction 8.6 |
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 |
Tech Specs | ||||||
color‎White | color White | color White | color White | color ‎White | color ‎White | color White |
alarm‎Smoke, CO | alarm Audible | alarm Audible | alarm Smoke Alarm | alarm ‎Audible | alarm ‎Smoke Alarm | alarm Smoke Detector |
item weight‎1.68 pounds | item weight 3.48 pounds | item weight 9.6 ounces | item weight 12.8 ounces | item weight ‎0.8 ounces | item weight ‎9.6 ounces | item weight 0.59 Pounds |
power source‎Corded Electric | power source Battery Powered | power source Battery Powered | power source Hardwired | power source ‎Battery Powered | power source ‎Battery Powered | power source Hardwired |
sensor type‎Ionization | sensor type Ionization | sensor type Ionization | sensor type Photoelectric | sensor type ‎Ionization | sensor type ‎Ionization | sensor type Photoelectric |
batteries included‎Yes | batteries included Yes | batteries included Yes | batteries included - | batteries included ‎Yes | batteries included ‎Yes | batteries included - |
included components‎Easy Adapter Plug, 9V Battery | included components First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 6-Pack | 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 ‎smoke detector, batteries, mount | included components ‎Easy Adapter Plug, 9V Alkaline Battery | included components - |
battery cell type‎Alkaline | battery cell type Zinc Carbon | battery cell type Alkaline | battery cell type - | battery cell type ‎Alkaline | battery cell type ‎Alkaline | battery cell type - |
product dimensions‎21.5 x 7.5 x 3.5 inches | product dimensions 1.9D x 5.6W x 5.6H | product dimensions 2.2D x 5.6W x 5.6H | product dimensions - | 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 - |
batteries‎1 9V batteries required. (included) | batteries 1 9V batteries required. included | batteries 1 9V batteries required. included | batteries - | batteries ‎1 9V batteries required. (included) | batteries ‎1 9V batteries required. (included) | batteries - |
item package quantity‎1 | item package quantity 1 | item package quantity 1 | item package quantity - | item package quantity ‎1 | item package quantity ‎1 | item package quantity - |
style‎Precision Detection | style 9120B | style Hardwired | style - | style ‎9120BFF | style ‎Precision Detection | style - |
batteries required‎Yes | batteries required Yes | batteries required Yes | batteries required - | batteries required ‎Yes | batteries required ‎Yes | batteries required - |
pattern‎SMICO100-AC | pattern Filter | pattern - | pattern - | pattern ‎Filter | pattern ‎SMI100-AC | pattern - |
number of items‎3 | number of items - | number of items 6 | number of items - | number of items ‎1 | number of items ‎1 | number of items - |
size‎3-Pack | size 6-Pack | size - | size - | size ‎1-Pack | size ‎1-Pack | size - |
operating humidity- | operating humidity - | operating humidity - | operating humidity up to 95 relative humidity RH , non-condensing | operating humidity ‎10-95% RH | operating humidity - | operating humidity Up to 95 relative humidity RH , non-condensing |
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 AlertFirst Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup - 3 Pack
9.4 Easy installation9.3 worth the money9.3 InstructionWhy we love it
Reduces false alarms from cooking.
Easy installation with Quick Connect Plug.
Battery backup ensures continuous protection.
-
9.6
2First Alert
First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 6-Pack
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.
-
9.5
3First Alert20% Off
First Alert BRK SMI100-AC Hardwired Smoke Detector with Battery Backup, 6-Pack
9.4 Easy installation9.3 worth the money9.3 InstructionMain highlights- Tamper resistant locking pins, single button silence/test and loud 85Db alarm
- Open mounting design for easy installation with side load battery compartment for quick replacement and interconnect able up to 18 units (12 smoke, 6 co/heat/relay)
- Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety
- 6 pack of hardwired smoke alarms, includes battery backup for power outages
- 120-Volt AC power with 9-volt battery backup (included) to keep alarm functioning during power outage
- 10-Year limited
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Features
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Value for money
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