The First Alert Smoke Alarm with Smart Sensing Technology and Nuisance Resistance utilizes two differing technologies to achieve the maximum in reassurance. Capable of quickly deciphering between flaming and smoldering fires, this alarm is equipped with dual photoelectric and ionization smoke sensing technologies. Fast flaming fires spread quickly and leave minutes, maybe seconds, to react. Smoldering fires burn long and can unknowingly fill the home with smoke causing smoke inhalation. The SA320CN's smart sensing microchip helps determine the difference between non-threatening conditions and real emergencies.
This alarm comes equipped with a Mute Button that serves the dual purpose of quickly silencing your alarm as well as testing its function. The addition of an EZ access battery door removes the hassle and burden of collecting your alarm from the ceiling and replacing its batteries. While all smoke alarms are designed to detect smoke, different sensing technologies react differently to certain types of fires. This alarm makes use of both ionization and photoelectric sensors to offer the earliest possible warning, regardless of the type of fire. This alarm comes with a 10-year limited warranty and meets UL217 Standards.
First Alert Smoke Alarm SA320CN
* California Residents - Please Note This Alarm is Not Compliant with California State 10 Year Sealed Battery Alarm Legislation Requirements.
Ionization smoke alarms are more sensitive at sensing small particles, which tend to be produced in greater amounts by hot, flaming fires, that are consuming combustible materials rapidly and may spread quickly.
Photoelectric smoke alarms are generally more sensitive at sensing large smoke particles, which tend to be produced in greater amounts by smoldering fires, which may smolder for hours before bursting into flame.
For maximum protection and full coverage from all types of fires, your best option is to use an smoke alarm that features both photoelectric and ionization sensing technologies.
Average Customer Rating Based on 45 reviews:
Replacement Alarm - 12/31/2015
Reviewer: Charles Brady
Unit is a good replacement for an alarm that went bad after 10 years of use.
Senseable Safety-1st Alert - 09/08/2015
Reviewer: Carl Carlson
I've placed my full trust with these 5 1st Alert devices, and although it's only been two weeks that they have been in place, but it seems that every thing is working as designed and as expected, which pleases me
easy to install - 07/05/2015
Reviewer: Cherie Hart
I like that it was easy to install--just 2 drill holes needed. i can change the batteries without taking the unit down from its mount. But if I do need to take it down, it is easy to do so and to replace, unlike my previous smoke alarm.
Great Product - 04/30/2015
Reviewer: Carol Lampman
Easy to install and has a nice design. Like the fact that it detects fire as well as smoke. Hopefully, we will never hear it. Great buy at a reasonable cost.
Reviewer: Cynthia Tucker
Easy to install. I like that it uses AA batteries instead of 9 volt. Seems to work well. :
Good Upgrade - 04/10/2015
Reviewer: Karen Staats
This is my first dual fire alarm photoelectric and Ionization. All my fire alarms are from First Alert and have lasted until it is recommended they be changed. Installation was easy enough since I was replacing a previous fire alarm. This model requires changing the batteries, which I prefer.
Reviewer: Mike Teitelbaum
Detector installed very easily & I hope that there is no reason for it to go off.
Smoke Alarm with Sensing Technology - 02/25/2015
Reviewer: Candyce Conley
Easy to order, arrived promptly, easy installation. Works great. Hope we never need it.
Easy to install - 02/04/2015
Reviewer: David Daniel
These units are easy to install, and we have had no false alarms, and thank goodness no real ones, since installing.
Great replacement - 01/29/2015
Reviewer: W F Nicholson
Replaced my old first alert smoke detector. Easily done. Hopefully, I will be as satisfied with this replacement that used the same footprint after more than 10 years.
Q: How often do you need to change the batteries?
A: Actual battery service life depends on the particular design of your smoke or carbon monoxide alarm and the environment in which it is installed. All kinds of alarm batteries specified in the user's manual are acceptable replacement batteries. Regardless of the manufacturer's suggested battery life, you MUST replace the batteries immediately once the unit starts "chirping" (the "low battery warning"). It is recommended that you change the batteries in your alarms when you change your clocks for daylight saving time. Also consider replacing your current alarms with 10-Year Life alarms that never require a costly battery replacement for the ten year life of the alarm. This 10-Year series is available in smoke, carbon monoxide and combination alarms.
Q: What is the proper placement of smoke alarms?
A: It is important that you have the proper placement for your smoke alarms. Install your alarms at least 20 feet from appliances like furnaces and ovens, which produce combustion particles. Alarms should be at least 10 feet from high humidity areas like showers and laundry rooms, and at least 3 feet from heat/AC vents. Be sure to install a smoke alarm in each bedroom, one at the top of each stairwell, and one on every level.
Q: My smoke alarm keeps chirping and beeping. Why does my smoke alarm chirp intermittently?
A: It is likely that the reason your smoke alarm keeps chirping and beeping is that the battery is low. Whenever your smoke alarm keeps chirping, replace the battery immediately.
Other reasons include: It could be a different device or appliance such as a security system, monitor, carbon monoxide alarm, or other device which has a similar low battery or alert signal. Some of the same factors that cause unwanted alarms can cause intermittent alarms: dust and insects in the alarm or power interruptions in hardwired alarms. Improper wiring on AC or AC/DC smoke alarms. AC alarms will chirp every 5 seconds if the interconnect wire is grounded. The orange interconnect wire should NEVER be grounded; it should only be used to interconnect other smoke alarms or compatible devices.
Q: Why doesn't my smoke alarm sound when I push the test button?
A: It is important that you frequently test your smoke alarms. When you are testing your smoke alarm, there are a number of reasons why the alarm might not sound:
Q: Why does my smoke alarm go off when I install a battery or turn on the AC power?
A: It is normal for smoke alarms to go off and sound briefly (up to 5-10 seconds) when you install a new battery or when they are powered up. If the alarm continues to go off and no smoke is present, the cause may be one of the following:
Q: My smoke alarm keeps chirping, even with a new battery. What is causing this?
A: There are a number of possible causes for your smoke alarm to keep chirping even with a new battery.
Q: I lost my First Alert smoke alarm owner's manual. How can I get a new one?
A: First Alert smoke alarm owner's manuals are available online for download at no cost. Find your alarm in our Smoke Alarms section.
Q: Why does the National Fire Protection Association (NFPA) recommend that home smoke alarms be replaced after 10 years?
A: Smoke alarms have a limited life. Although each smoke alarm and all of its parts have passed many stringent tests and are designed to be as reliable as possible, any of these parts could fail over time. Therefore, you must test the devices weekly. The unit should be replaced immediately if it is not operating properly. The performance of smoke alarms older than 10 years is simply not reliable. To ensure your family's safety, all carbon monoxide and smoke/CO combination alarms need to be replaced every 5-7 years. All smoke alarms need to be replaced every 10 years.
If it's time to replace your alarms, consider the NEW 10-Year Life series and never have to worry about a battery replacement for the life of the alarm.10-Year alarms are available in smoke,carbon monoxide and combination alarms.
Q: I'm ready to change my alarm battery - what replacement batteries can I use?
A: Check your User's Manual or the nameplate on the back of the alarm. Different smoke detectors & CO alarms use different kinds of batteries - 9V, AA, AAA - it all depends on the particular model you have. Use quality batteries like lithium batteries - having plenty of power is worth any extra cost. Never use rechargeable batteries because they may not always provide a consistent charge.