RECOMMENDED LOCATION OF ALARMS

•Locate the first smoke alarm in the immediate area of the bedrooms. Try to protect the escape route as the bedrooms are usually farthest from an exit. If more than one sleeping area exists, locate additional smoke alarms in each sleeping area. If a hall is more than 40 feet (12 meters) long, install a smoke alarm at each end.

•Locate additional smoke alarms to protect any stairway as stairways act like chimneys for smoke and heat.

•Locate at least one smoke alarm on every floor level.

•Locate a smoke alarm in any area where a smoker sleeps or where electrical appliances are operated in sleeping areas.

•Smoke, heat and other combustion products rise to the ceiling and spread horizontally. Mounting the smoke alarm on the ceiling in the center of the room places it closest to all points in the room. Ceiling mounting is preferred in ordinary residential construction. However, in mobile homes, wall mounting on an inside partition is preferred to avoid the thermal barrier that may form at the ceiling.

•When mounting smoke alarm on the ceiling, locate it a minimum of 4" (10cm) from a side wall or corner (see Diagram A).

•When mounting smoke alarm on a wall, if local codes allow, use an inside wall with the top edge of the smoke alarm a minimum of 4" (10cm) and a maximum of 12" (30.5cm) below the ceiling/ wall intersections (See Diagram A).

Existing Homes:

The NFPA requires a smoke alarm on every level and outside each sleeping area in existing construction. An existing household with one level and one sleeping area is required to have one smoke alarm.

New Construction Homes and Manufactured Homes:

The NFPA requires AC-powered, interconnected smoke alarms to be installed inside each bedroom, outside each bedroom area, and on every level of the home. They also require a minimum of two AC-powered, interconnected smoke alarms in any new construction home.

Sloped Ceilings (Peaked Ceilings):

Smoke alarms or smoke detectors mounted on a peaked ceiling shall be located within 36 in. (914 mm) horizontally of the peak, but not closer than 4 in. (102 mm) vertically to the peak.

Sloped Ceilings (Shed Ceilings):

Smoke alarms or smoke detectors mounted on a sloped ceiling having a rise greater than 1 ft. in 8 ft. (1 m in 8 m) horizontally shall be located within 36 in. (914 mm) of the high side of the ceiling, but not closer than 4 in. (102 mm) from the adjoining wall surface.

Tray-Shaped Ceilings:

Smoke Alarms or smoke detectors shall be installed on the highest portion of the ceiling or on the sloped portion of the ceiling within 12 in. (305 mm) vertically down from the highest point.

Mobile Home Installation:

For minimum protection, smoke alarms should be installed in compliance with H.U.D. Manufactured Home Construction Safety Standards, Title 24 CFR, Section 3280.208 and Section 3282. For additional protection, see Single Story Residence smoke alarm requirements/recommendations for Existing Homes and New Construction Homes.

Note: For mobile homes built before 1978, install smoke alarms on inside walls between 4” and 12” from the ceiling (older mobile homes have little or no insulation in the ceiling). This is especially important if the ceiling is unusually hot or cold.

Install a smoke alarm inside each bedroom and in the hallway outside each separate sleeping area.

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Universal Security Instruments 3304L, 3895L installation instructions Recommended Location of Alarms
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3304L, 3304, 3895, 3895L specifications

Universal Security Instruments (USI) has made a prominent mark in the home security and safety industry with its innovative smoke and carbon monoxide (CO) detectors. Among their standout products are the USI 3895L, 3895, 3304L, and 3304 models, each designed with user-friendly features, advanced technologies, and exceptional reliability.

The USI 3895L is a hardwired smoke and CO detector that features a built-in battery backup, ensuring unwavering protection even during power outages. This model includes a voice alarm system that announces the specific type of danger, whether it be smoke or carbon monoxide, allowing users to respond appropriately. Its continuous self-checking functionality enhances reliability by routinely testing the unit's circuits, battery, and sensors.

The USI 3895, while similar in many ways to the 3895L, emphasizes simplicity and efficiency. This battery-operated model provides a compact design without sacrificing performance. It features a sleek appearance, making it an aesthetic addition to any home, while still offering robust smoke and CO detection capabilities. The 3895 also includes a loud alarm and test/silence button for quick and easy functioning.

Moving on to the USI 3304L, this model is an all-in-one smoke and CO alarm that caters to families and businesses alike. Like the 3895L, it comes with a hardwired setup and a battery backup. The 3304L is particularly praised for its photoelectric smoke sensing technology which minimizes false alarms caused by cooking smoke and steam. This technology increases response times for smoldering fires, giving users valuable time to react.

Lastly, the USI 3304 is a more accessible variant within the same series, designed as a battery-operated smoke and CO detector. Retaining many advanced features of the 3304L, this model is compact and versatile, suitable for various spaces within a home or office. It comes equipped with an LED indicator for operational status and an easy-to-read user manual, ensuring ease of use and installation.

In summary, Universal Security Instruments' 3895L, 3895, 3304L, and 3304 models each provide essential life-saving features with cutting-edge technology. From voice alarms and photoelectric sensing technology to reliable battery backup options, USI delivers robust solutions for fire and carbon monoxide safety. Employing these detectors can significantly enhance home safety while providing peace of mind for families and property owners alike.
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