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First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack
TMT 248
Price Details
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Utilizing First Alert's Precision Detection advance sensing technology, this hardwire smoke alarm provides early warning and easy installation without the need to rewire.
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What Stands Out
Product Details
- First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency.
- Through early warning interconnect, when one alarm sounds, all compatible alarms will sound
- Battery backup provides continuous protection during power outages
- Alarm indicator visually identifies the unit that initiated the alarm
- Quick Connect Plug included allows for easy installation with no need to rewire
| Power Source | Corded Electric |
| Alarm | Smoke Alarm |
| Sensor Type | Ionization |
| Product Style | Precision Detection |
| Color | White |
| Item Dimensions D x W x H | 5.6"D x 5.6"W x 1"H (14.2 x 14.2 x 2.5 cm) |
| Item Weight | 9.6 ounces (272.16 grams) |
| Brand | First Alert |
| Model Number | SMI100-AC |
| Global Trade Identification Number | 10029054022469 |
| Number of Items | 1 |
| Manufacturer | Resideo |
| UPC | 029054022462 |
| Mfr Part Number | SMI100-AC |
| Unit Count | 1.0 Count |
| Item Type Name | Smoke Alarm |
| Built-In Media | Easy Adapter Plug, 9V Alkaline Battery |
| Style | Precision Detection |
| Product Dimensions (L x W x H) | 5.6"D x 5.6"W x 1"H (14.2 x 14.2 x 2.5 cm) |
Dangerous Goods
To avoid the delay in customs clearance process for Dangerous Goods, the shipment shall be opened at our warehouse facility to check the severity of hazardous components. Please see the list of Dangerous goods here.
Who Should Buy?
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Homeowners
Ideal for homeowners seeking a reliable smoke alarm system to protect their residences from fire hazards effectively.
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Families with Children
Great for families needing to enhance safety measures as it interconnects with other alarms for immediate alerts.
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Multi-Story Properties
Suitable for large homes or multi-story properties where comprehensive smoke detection coverage is essential for safety.
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Renters
Not suitable for renters since installation requires hardwiring, which may not be allowed in rental properties.
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Budget-Conscious Buyers
Individuals seeking low-cost smoke detectors may find this 3-pack pricier compared to basic battery-operated options.
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Minimalists
Not ideal for those preferring simpler solutions as this product involves installation and maintenance of interconnected systems.
Product Description
Customer Questions & Answers
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Question:
What is the difference between hardwired and battery-operated smoke detectors?
Answer: Hardwired smoke detectors, like the First Alert 9120B, connect directly to your home's electrical system and offer continuous power. Battery-operated models rely solely on batteries that may require changing. Hardwired units are more reliable since they eliminate the risk of dead batteries. However, First Alert 9120B includes a battery backup feature, ensuring functionality even during power outages. For example, in an emergency during a blackout, the detector will still alert you, providing an extra layer of safety. -
Question:
How do I install the First Alert 9120B smoke detector?
Answer: Installation of the First Alert 9120B is straightforward. Begin by selecting a location on the ceiling or high on the wall, away from corners. Use the included mounting bracket to secure it in place and connect the hardwired wiring according to the manual. Remember to test the detector once installed. Proper installation height is crucial for optimal functionality, such as placing it 4 to 12 inches from the wall, as smoke rises and can trigger the alarm more effectively. -
Question:
Can I interconnect multiple First Alert 9120B alarms?
Answer: Yes, multiple First Alert 9120B smoke detectors can be interconnected. This means when one alarm detects smoke or carbon monoxide, all interconnected units will sound an alarm, enhancing alertness throughout your home. This is particularly beneficial in larger residences where alarms in different rooms provide comprehensive coverage. For instance, if an alarm in the basement is triggered, you can hear it in bedrooms upstairs, ensuring that everyone is alerted regardless of their location. -
Question:
What is the battery backup duration for the First Alert 9120B?
Answer: The battery backup in the First Alert 9120B is designed to provide reliable power during outages, typically lasting several hours to over a year, depending on the battery type used. The unit comes with a 9-volt battery already included but requires regular testing and maintenance. It’s recommended to change the backup battery at least once a year to ensure that the smoke detector remains fully operational. This feature grants peace of mind, knowing your detector can function even when the power is out. -
Question:
How often should I test my First Alert 9120B smoke detector?
Answer: It's crucial to test your First Alert 9120B smoke detector at least once a month to ensure it is functioning properly. Use the test button on the unit, which will create a loud alarm sound when pressed. Additionally, replace the batteries annually and consider replacing the entire smoke detector every 10 years for optimal safety. Regular testing helps detect malfunctions early, so you can replace the unit before it fails to alert you in case of smoke or fire. -
Question:
What are the key features of the First Alert 9120B?
Answer: The First Alert 9120B smoke detector boasts several key features such as hardwired operation with battery backup, a photoelectric sensor for quick smoke detection, an easy-to-remove battery compartment, and an end-of-life signal that alerts you when it’s time to replace the unit. The photoelectric sensor is particularly effective for detecting smoldering fires, making it ideal for homes where such risks are prevalent. Additionally, the three-pack option offers great value, providing coverage for multiple rooms in one purchase. -
Question:
What types of fires does the First Alert 9120B smoke detector detect best?
Answer: The First Alert 9120B features a photoelectric sensor, which excels at detecting smoldering fires that produce larger smoke particles, such as those caused by upholstered furniture or electrical malfunctions. This detection type minimizes false alarms triggered by cooking smoke or steam. It's particularly suitable for areas near kitchens or living spaces where such fires are more common. Pairing it with ionization smoke detectors can provide comprehensive protection, covering both flaming and smoldering fires effectively. -
Question:
Are First Alert smoke detectors suitable for use in homes with pets?
Answer: Yes, First Alert smoke detectors, including the 9120B model, are suitable for homes with pets. The photoelectric sensor reduces the likelihood of false alarms from cooking, enabling a safer environment. However, it's essential to place detectors away from common pet activities, such as feeding areas or where smoke may arise from cooking. This way, alarms will function effectively without unnecessary disruptions. They are also sensitive enough to alert you quickly in case of an emergency, ensuring everyone's safety, including your pets. -
Question:
Do I need a professional installation for the First Alert 9120B?
Answer: While some homeowners opt for professional installation, the First Alert 9120B is designed for DIY installation. Following the included manual makes it accessible for most users. However, if you are uncomfortable with electrical work or local building codes require professional installation, hiring an electrician may ensure compliance with regulations. For instance, if you own an older home with complicated wiring, it may be safer to consult an expert, ensuring that installation is both safe and effective. -
Question:
Where can I buy First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 3-Pack?
Answer: You can purchase the First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 3-Pack through Ubuy in Turkmenistan. Ubuy offers a wide selection of home safety products, ensuring you get authentic items delivered right to your doorstep. With Ubuy, you can also enjoy various shipping options and customer service support to assist you in making a confident purchase decision.
FirstAlert Smoke Detectors & Fire Alarms SMI100-AC Editorial Review
The First Alert Smoke Alarm, SMI100-AC, has garnered impressive feedback from customers who value its reliability, ease of installation, and safety features. Users appreciate the interconnectivity of the alarms, which ensures that when one detects smoke, all alarms sound, providing an essential layer of protection for homes with multiple rooms or levels. Installation is described as straightforward, particularly for those replacing older units, making it accessible even for less experienced DIYers. Many reviews highlight the alarm's superior loudness and clarity, ensuring alerts are audible even in emergencies. Constructed with solid build quality, these alarms have been deemed well-made and trustworthy, reinforcing First Alert's reputable branding. The presence of a battery backup offers additional peace of mind during power outages, while energy-efficient LED indicators help users ascertain the status of the device easily. One common critique regarding the smoke detectors is the instruction manual, which some users feel could be more detailed, especially for first-time installers. Additionally, a few users noted challenges with the battery tray design, finding it somewhat difficult to close properly. Although concerns related to the product's order fulfillment experience from third-party sellers were raised, they do not diminish overall satisfaction with the smoke alarm itself. Overall, the First Alert Smoke Alarm is recommended for individuals seeking effective, reliable smoke detection with user-friendly installation and robust safety features. **
Customer Reviews & Ratings
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5 Star
80%
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4 Star
9%
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3 Star
5%
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2 Star
1%
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1 Star
5%
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Pros
- Easy installation process, particularly when replacing older detectors
- Interconnect feature enhances safety across the home
- Loud and clear alarm system
- Solid build quality and trusted brand reputation
- Battery backup for use during power outages
- Easy-to-understand status indicators
Cons
- Instructions could be more detailed for first-time installers
Product Price History
Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
- Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.
TMT 248
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Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
Features & Benefits
- Easy to install and replace, no rewiring needed.
- Interconnect compatible for whole home alarm systems.
- Precision Detection technology reduces nuisance alarms.
- Provides early warning during a home fire emergency.
- Battery backup ensures protection during power outages.
- Visual alarm indicator shows which unit initiated the alarm.




















