Product Description - BRK SMI105-AC Hardwired Smoke Alarm with 10-Year Battery Backup

BRK SMI105-AC Hardwired Smoke Alarm with 10-Year Battery Backup

The BRK Model SMI105-AC is a premium, AC-powered smoke alarm engineered to deliver continuous, professional-grade whole-home protection. Utilizing an advanced dual ionization sensing chamber, this unit provides earlier warning indicators for fast-flaming fire hazards while significantly minimizing frustrating cooking or nuisance alarms. Designed for seamless system integration and maximum network reliability, it features a 10-year factory-locked 9V Lithium battery backup to ensure uninterrupted security during building power outages. With its robust interconnectivity, gasketless base, and code-compliant certification, the SMI105-AC is the ideal choice for modern residential safety grids.

Key Features

Advanced Dual Ionization Chamber: Engineered with specialized dual-chamber ionization sensing technology for faster response times to fast-flaming fires and fewer false alerts.
10-Year Factory-Locked Backup: Powered by a standard 120V AC line paired with a factory-locked 9V Lithium battery backup, entirely eliminating the need for periodic battery swap-outs for a full decade.
Whole-Home Interconnect Capability: Network-connects with up to 18 compatible First Alert and BRK devices (maximum of 12 smoke alarms), instantly cascading the alert signal across every connected room when one unit triggers.
Latching Alarm Indicator: Visually identifies and locks onto the specific, primary unit that originally initiated the alarm cycle or requires troubleshooting.
One-Touch Diagnostic Interface: Features a single, easily accessible Test/Silence button to run routine internal hardware diagnostic routines or temporarily hush nuisance alarms.
Smart Gasketless Base Configuration: Outfitted with a gasketless mounting base to ensure true, flat visual alignment during installation, alongside tamper-resistant locking pins to secure the chassis.
Remodeling Dust Shield: Includes a protective pull-off construction dust cover to safeguard delicate internal sensing components from airborne debris during framing, drywalling, or renovations.

Product Specifications

Attribute	Specification
BRK Model Number	SMI105-AC
Device Configuration	Hardwired Interconnectable Smoke Alarm
Sensing Technology	Advanced Dual Ionization Chamber
Primary Input Voltage	120V AC, 60Hz
Emergency Battery Backup	9V Lithium Powercell (10-Year, Factory-Locked, Non-Replaceable)
Interconnection Capacity	Hardwire Interconnectable with up to 18 units max (12 Smoke Alarms max)
Acoustic Alarm Level	85dB Clear Output at 10 feet (Solid-state Piezo Horn)
System Reset Trigger	Automatic Reset Functionality when smoke clears the chamber
Product Dimensions	5.58" Diameter x 1.99" Height
Operating Range	40°F to 100°F (4.4°C to 37.8°C) \| 10% to 95% Relative Humidity (RH)
Certifications & Standards	Conforms to UL217, CSFM, NFPA 72, NFPA 101, ICC Safety Standards Marks

Indicator Lights & Audio Signals

AC Utility Power Mode: Constant Illuminated Green LED
DC Battery Backup Mode: Flashes Green precisely once every minute
Active Smoke Alarm Trigger: 3 Beeps accompanied by rapid Flashing Red LED
Latching Memory Status: Flashes Red (2 seconds on / 2 seconds off following an active alarm event)
Low Battery Status: 5 Acoustic "Chirps" every minute (Indicates complete alarm replacement required)
End of Life / Malfunction: 3 Acoustic "Chirps" every minute (Indicates complete alarm replacement required)

Ideal Applications

Residential Placements: Critical life-safety deployment inside master suites, secondary bedrooms, connecting hallways, and main living areas.
Multi-Family Developments: Code-compliant protection for multi-unit housing layouts, residential complexes, and apartment buildings.
Synchronized Safety Grids: Perfect for high-coverage residential infrastructure projects mandating interconnected, whole-home fire alarm networks.
Construction & Retrofits: Engineered for quick integration into new construction structures or as a premium upgrade for legacy residential safety footprints.

Product Specifications PDF

Click Here to View Full PDF Specification Sheet

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Shipping

We offer FREE SHIPPING for orders with a minimum of $1000.00 in total amount to US destinations only except Hawaii and Alaska. This offer is subject to change without prior notice.

We can ship anywhere within United States and to some parts of the world. Note that there are restrictions on some products, and some products cannot be shipped to destinations outside California.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for the items we sell are weight-based. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Returns Policy

You may return most new, unopened items within 1 year of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

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