First Alert Hardwired Carbon Monoxide Alarm with Battery Back-up - CO5120BN

Name: First Alert Hardwired Carbon Monoxide Alarm with Battery Back-up - CO5120BN
Brand: First Alert
SKU: CO5120BN
Price: 39.55 USD
Availability: InStock
Rating: 4.9 (72 reviews)

First Alert Wired In Carbon Monoxide Detector

Availability: In Stock

Regular: $89.95

Price: $39.55

You Save: $50.40 (56% Off)

- 72 Customer Reviews

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Hardwired Carbon Monoxide Alarm with Battery Back-up

This First Alert Hardwired Carbon Monoxide Alarm with Battery Back-up meets codes where CO alarms are required for new construction. Installation is seamless with the use of a quick plug-in power connector. Additional features such as a microprocessor that limits nuisance alarms and a single test/silence button add versatility to an already efficient carbon monoxide alarm.

First Alert Hardwired Carbon Monoxide Alarm CO5120BN

Hardwired Carbon Monoxide Alarm with Battery Back-up Features:

Quick Plug-In Power Connector.
120-volt AC Inter-Connectable.
Microprocessor Controlled for Fewer Nuisance Alarms.
Single Test/Silence Button.
Battery Drawer Lock.
Mounting Bracket Lock for Tamper Resistance.
Low Battery Warning 'Chirp'.
Missing Battery Tab.
Swing Open Battery Drawer.
Emits T3 Pattern.
10 Year Limited Warranty.
Product Dimensions (LxWxH): 3.4 x 1.7 x 5 in.

Product Specs

UPC:

029054856173

MPN:

CO5120BN

Write A Customer Review

4.9

Average score based on 72 reviews

CO update

Reviewed: 08/06/2020 by Leslie Garrick

Installed to existing frame - a snap

Reviewed: 06/29/2020 by Kathleen Brown

Excellent service, fast delivery.

Carbon Monoxide Alarm

Reviewed: 06/17/2020 by Patrice Lawlor

I received my First Alert Hardwired Carbon Monoxide Alarm with Battery Back-up in the time frame I was supposed to. It was very easy to install.

Reviewed: 06/09/2020 by Kelly Thimm

My old detector quit working and this one fit perfectly. Easy install.

Reviewed: 12/09/2019 by Kenneth Lawrence

Works great.

co detector purchase

Reviewed: 11/12/2019 by Kenneth Numerowski

Product was delivered in a timely manner at a competitive price.

Reviewed: 09/23/2019 by Ronda Kleeberg

Easy to install and had the same wiring which made it very simple to switch out the old ones!

Purchase review

Reviewed: 07/11/2019 by Stephen Fritch

Ordered carbon dioxide detector from First alert store. They processed and sent the detector without delay. Called with mailing concern and they quickly and efficiently helped. A great Co. to work with and product is exactly what I needed. The web site is great. Thank You First Alert!

The best for home improvement

Reviewed: 06/20/2019 by Miriam Gomez

I buy all my smoke and CO alarms here. Prices are very good and my house is protected now, top to bottom.

Reviewed: 04/25/2019 by Cheryl S.

This was for a replacement. It was easy to change out as it fit into the old original frame base. The wire were marked well for easy placement as well.

Reviewed: 04/25/2019 by Cheryl S.

This was for a replacement. It was easy to change out as it fit into the old original frame base. The wire were marked well for easy placement as well.

Great service

Reviewed: 01/13/2019 by howell lewis

Perfect service , on time shipping fair prices

Fast and Easy!

Reviewed: 07/31/2018 by Kimberlee Keefe

I needed a replacement because ours expired. Ordering from the First Alert Store was SO fast and easy! I'll ALWAYS shop here for these products for my home! Wonderful selection and arrived quickly!

Reviewed: 03/05/2018 by Anthony Naples

Everything worked great.

Good product

Reviewed: 03/05/2018 by Jennifer Bittle

Just installed today and so far so good. Arrived before expected delivery date. Thank you.

Perfect replacement!

Reviewed: 01/21/2018 by Chad Goble

The battery unit went out on our previous device and a replacement wasn't available as that device was discontinued. I called First Alert and they let me know what the replacement model was that would utilize the same wiring. And just as they said, this device fit perfectly and was super easy to install.

Perfect

Reviewed: 12/05/2017 by Robert Fantaroni

I found the right model, ordering pretty easy and received alarm within a week, so very pleased

Reviewed: 05/15/2017 by Lowell Marx

Replaced same item installed 17 years ago in our new home.

replacement CO2

Reviewed: 04/21/2017 by Sharon Scholten

easy ordering, arrived on time, perfect replacement for the expired alarm replacement

Happy Customer

Reviewed: 04/18/2017 by David Bloom

Easy to order, good price, on time delivery and it works!

Satisfied!

Reviewed: 04/08/2017 by Keith Kartman

Shipped promptly, works well with no issues. Thank you for a pleasant process.

Reviewed: 04/03/2017 by Jovito Tabares

replaced the 13 years old Carbon monoxide alarm with battery b/u so easy took me probably less than 5 minutes each to replace with a new unit.

Reviewed: 03/29/2017 by James M Smith

Excellent service & quick response, Thanks

Replacement

Reviewed: 01/27/2017 by Michael Luttati

Plugged right in and worked

Reviewed: 12/19/2016 by Patricia Vaulding

Received quick delivery and product which we were looking for.

Reviewed: 12/02/2016 by Ken Huntley

IT WAS GREAT TO BE ABLE TO GET THIS ONLINE. I COULDN'T FIND IT IN ANY OF THE STORES.

Reviewed: 11/08/2016 by Robert Moschell

Was able to replace the non working one with no trouble at all.

Fast Service

Reviewed: 11/01/2016 by Charles Medchill

I had been away from home for a short time. When arriving home I could hear the CO alarm, after checking the area I determined that the unit was at fault. I ordered a new CO5120BN and an additional as a spare. The replacement arrived in less than a week allowing me to solve he problem. It was the exact unit I needed so no change of wiring was required. Thanks First Alert for the excellent service.

Reviewed: 10/31/2016 by Truman Onderdonk

Replaced Smoke/CO with CO only due to builders error, within 5 of stove. CO needed there for BR door. Would have been easier if base plate had been the same for all hardwired models.

First Alert is First Class!

Reviewed: 09/20/2016 by RawJawRic Panson

I bought 3 of these to replace the originals that were installed in my condo 17yrs ago and they are only expected to last for 10yrs.. NOW THATS RELIABILITY!!!

Shipped fast works great

Reviewed: 07/26/2016 by Kathleen Yung

Shipped fast product as described easy to install.

Reviewed: 06/28/2016 by Eileen Kraslen

Fast delivery

Reviewed: 06/14/2016 by Jeffery Harmon

Arrived promptly and works perfectly

Reviewed: 06/08/2016 by gloria Kee

Product worked just great. Thanks for the fast order

Reviewed: 06/08/2016 by Bobby Marcus

Direct replacement, easily changed out

Alarm

Reviewed: 06/03/2016 by Carroll Yates

Works like we hoped

Reviewed: 12/17/2015 by PAUL VIALE

I purchased this alarm to replace my present one which was old and defective. The replacement went smoothly with very little effort

Reviewed: 11/26/2015 by joy gdovin

install easilly

Easy process/ very satisfied

Reviewed: 11/23/2015 by Daniel Niedzwiecki

Before visiting the site after our carbon monoxide detector failed, I wasn't exactly sure what I would be looking for. The site was very well organized and easy to find our exact model to order. Product works well, easy to install, no complaints whatsoever.

Reviewed: 10/02/2015 by roberta hendrick

Easy to install. Like having the battery backup. Received order very quickly.

Reviewed: 09/09/2015 by Joseph A Frisoli

Excellent online store with expedient shipping. I purchased two units as one. I had was eight years old and was chirping periodically. Since I have four units in my home I purchased one additional.

Reviewed: 07/30/2015 by Frank Ciarkowski

The items came in when promised and work great. The new ones replaced units that were 14 years old and just began to falter. Obviously you make a great product.

Reviewed: 07/23/2015 by Henry Seegers

Very helpful...thank you

Fast delivery

Reviewed: 06/01/2015 by Srinivas Varala

I received the product within a week and it was easy to set up took just 5 min. Happy with the purchase. I am buying two more now.

Reviewed: 05/27/2015 by Val Soupios

Easy install, prompt delivery.

Carbon Monoxide Alarm

Reviewed: 04/30/2015 by John Flynn

The installation went well and the unit seems to be functioning properly.

Reviewed: 04/20/2015 by Steven Hucker

An exceptional detector and price.

excellent product

Reviewed: 03/26/2015 by Dianne Hendrigan

We moved into a brand new home 7 years ago and the builder had installed this carbon monoxide detector. As you would expect, it's now time for them to be replaced and we were so pleased with this product we decided to order the same detector. You can't go wrong with this product.

Reviewed: 01/19/2015 by John Elefante

The installation was easy. The test worked properly and the inductor light is on and appears to be working properly. I'm happy with my purchase.

Hardwired Carbon Monoxide Alarm with Battery Back-up

Reviewed: 12/30/2014 by joseph curatolo

So far good and delivered as expected. And to my surprise Duracell batteries included.

Hard wire Carbon Monoxide Alarm

Reviewed: 10/01/2014 by joseph Butigieg

Arrived in a few days, quick hook-up using original wiring. Just plug in and good to go.

Reviewed: 11/15/2013 by Gerard Philipp

Good instructions, nice design, easy for homeowner to install. Wanted CO alarm for my new natural gas boiler.

Reviewed: 06/24/2013 by Edward Bernard

Great equipment. Easy to order and fast delivery!

Reviewed: 06/14/2013 by Melvin Belafsky

Easy to order. Received several updates from delivery service. Received item in good order. Replaced old unit in a matter of seconds. Everything in fine working order

simple CO

Reviewed: 03/04/2013 by MARK HARTMAN

this is a reasonably priced ac/battery carbon monoxide alarm

Reviewed: 01/04/2013 by Hilda Andengaard

I bought this to replace the one that I had been using for eight years. It is the same model and was the easiest way to replace the broken one.

Reviewed: 11/05/2012 by Eric Blaeser

Did not work dead on arrival. Purchased competitive product locally and worked fine. Very disappointed.

Customer Service Response:

Dear Customer - We are very sorry to hear of the issue you had with this alarm. We are happy to replace this for you. Please advise us if you would like us to process an RMA for this item. -Thank you

Great product

Reviewed: 11/04/2012 by Thomas Giangrande

Great alarm at a good price. Easy online ordering.

Excellent product

Reviewed: 06/07/2012 by Thomas Wessel

Easy installation and flawless function.

FAS-51886

Reviewed: 05/11/2012 by Tom Tinker

Got here just in time. Awesome!!

Reviewed: 02/10/2012 by Tom Tinker

I kept looking for FedEx to deliver the Co alarm, but it came in the USPS.

Good product, easy switch-out/install

Reviewed: 02/02/2012 by Julie Boswell

Product was very easy to install very easy to switch out previous Hardwired CO Alarm wiring and install new product. Nice to have a CO Alarm that uses regular battery for back-up instead of special product battery.

CO5120BN

Reviewed: 12/26/2011 by Thomas Zmyslinski

Easy to install.

Reviewed: 12/14/2011 by Kevin Withrow

easy to install

Solid Product

Reviewed: 12/06/2011 by Michael Heffernan

Ordered this as a replacement for same model that has expired. House has several of the same kind that are interconnected, so this was the one I needed. Fair price for a quality unit.

Reviewed: 12/01/2011 by Jeffrey Fusco

they were very east to install

Reviewed: 08/23/2011 by Lee Graber

Have still to set this up and wire it.

Reviewed: 08/09/2011 by Wayne Spear

Great Product, as advertised and easy hookup

carbo monoxide detector installation

Reviewed: 07/24/2011 by Joseph Nicolosi

Installation very easy , delivery time as expected.Would order again

Reviewed: 07/19/2011 by ron johnson

The internet picture showed a c2010 smoke and carbon alarm. Thats what i ordered. your description was in error. I returned the co5120bn to you. Now you are charging me a restocking fee for your own error. credit my account for the 3.80.

Customer Service Response:

We do not carry a C2010 smoke and carbon alarm and never have. We looked into your order and you did order a CO5120BN which is what we sent you. If you would like to call us to discuss the restock fee please call 847-991-7190. Thank you.

GREAT PRODUCT

Reviewed: 07/11/2011 by Brad Dean

QUICK TURNAROUND TIME, EASY TO INSTALL.. GREAT PRODUCT

Reviewed: 05/30/2011 by GEORGE RAPCIEWICZ

great service, good ship time

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Q: How do I get my carbon monoxide alarm to stop chirping?

A: If your carbon monoxide alarm keeps chirping, the battery may be low or weak. On First Alert carbon monoxide detectors, check to see if the battery light is yellow or green. If the alarm is chirping and the light is yellow, it means the battery is low. The way to get a carbon monoxide alarm to stop chirping is to replace the battery.

Q: Where should I install carbon monoxide alarms? What is proper carbon monoxide alarm placement?

A: It is very important to install carbon monoxide alarms near or in each separate sleeping area. Many states now require that a carbon monoxide alarm is placed in each bedroom. For added protection, placement of an additional carbon monoxide alarm at least 15-20 feet away from the furnace or fuel burning heat sources is recommended. Also, install carbon monoxide alarms at least 10 feet from sources of humidity like bathrooms and showers. In two story houses, install one carbon monoxide alarm on each level of the home. If you have a basement, carbon monoxide alarm placement is recommended at the top of the basement stairs.

Q: Is there anywhere I shouldn't install carbon monoxide alarms?

A: Do not install carbon monoxide alarms in garages, kitchens, furnace rooms, or in any extremely dusty, dirty, humid, or greasy areas. Do not install alarms in direct sunlight, or areas subjected to temperature extremes. These include unconditioned crawl spaces, unfinished attics, un-insulated or poorly insulated ceilings, and porches. Carbon monoxide alarms should not be installed in outlets covered by curtains or other obstructions. Do not install in turbulent air-near ceiling fans, heat vents, air conditioners, fresh air returns, or open windows. Blowing air may prevent carbon monoxide from reaching the CO sensors.

Q: How many carbon monoxide alarms should I have in my home?

A: So how many carbon monoxide alarms should you have in your home? The National Fire Protection Association (NFPA) recommends that you should have a carbon monoxide alarm centrally located outside of each separate sleeping area in the immediate vicinity of the bedroom. For added protection, you should have additional carbon monoxide alarms in each separate bedroom and on every level of your house, including the basement. Some states now require that you have a carbon monoxide alarm in each bedroom of the house. If you install only one carbon monoxide alarm in your home, place it near or in your bedroom.

Q: What is the proper way to do a carbon monoxide alarm test?

A: The following procedure is the proper way to do a carbon monoxide alarm test - Press and hold the Test Button on the front of the alarm until the alarm sounds. Be sure you hold the button down long enough; it can take up to 20 seconds for the alarm to respond to the test.

Q: Is it a false alarm when my carbon monoxide alarm sounds and there doesn't seem to be a problem?

A: A carbon monoxide alarm false alarm should not occur if your alarm is in working order. Remember, carbon monoxide is an odorless, colorless gas. If your carbon monoxide alarm went off, it detected potentially harmful amounts of carbon monoxide. After the professionals have evaluated the situation, make sure no one has any symptoms of carbon monoxide poisoning.

Here are a few situations that may cause a carbon monoxide alarm "false alarm:"

The carbon monoxide alarm needs to be relocated. Carbon monoxide alarms should be located 15-20 feet away from all fossil fuel burning sources like furnaces and stoves. Alarms should be located 10 feet away from sources of humidity like showers.
Fossil fuel burning appliances may not be burning fuel completely. Check pilot lights/flames for blue color. Appearance of yellow or orange flames indicates incomplete combustion-a source of carbon monoxide.

Q: Will carbon monoxide alarms detect explosive gas leaks?

A: No, a single function carbon monoxide alarm reacts to carbon monoxide only. To detect explosive gas, you need an explosive gas detector. Different kinds of explosive gas can be detected and it is recommended that any home that utilizes natural or propane gas have at least one explosive gas leak detector.

First Alert CO5120BN Carbon Monoxide Alarm Manual

If you are interested in ordering a large quantity of items you may qualify for volume pricing discounts. Volume Discount Pricing is a great way for customers to save big on large, bulk orders of most items available in our store. Please send a bulk order request to our friendly sales staff so they may create a quote and provide personal service for your order! You will receive a response within 1-2 business days and our office hours are Monday through Friday, 8am-5pm CST.

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