2-in-1 Carbon Monoxide and Natural Gas Smart Alarm
120 Volt AC Hardwired Alarm
Can be used to replace the USI-7390 alarm, uses same connector plug.
Dual Technology Offers Double Protection
9 Volt Eveready Alkaline Battery Backup Included
Loud 85 db Alarm
Self Diagnostic Feature
Product End of Service Life Warning
Quick Draw Battery Drawer
3 LED's Indicate: Power, CO & Gas
Interconnectable up to 24 Compatible Devices
Quick Find Alarm Origination/Locator
Tamper Resistant Locking Feature for Alarm & Battery
Battery Activation Pull Tab
Bracket Mounts to any Standard Wiring Junction Box
Ideal for Homes, Apartments and Mobile Homes
Conforms to UL Std. UL 2034 and UL 1484
California State Fire Marshal Approved
7 Year Limited Warranty
The USI Electric MCN108 Hardwired Carbon Monoxide and Natural Gas Smart Alarm is a 2-in-1 device that provides double the protection with a single installation. This dual-sensing alarm protects against two deadly household threats: carbon monoxide and natural gas (or methane). Perfect for new or replacement installations, the 120-volt AC/DC hardwired alarm is suitable for houses, apartments and mobile homes. Auto sensitivity calibration provides superior nuisance alarm protection and creates consistency in alarm sensitivity. This alarm has additional automatic features including a self-diagnostics check to ensure proper operation, a sensitivity adjustment for changes in temperature or humidity and an end-of-service life warning that sounds when it's time to replace the battery. The 9-volt alkaline battery (included) continues protection in the event of a power outage.
This alarm features a quick activation pull-tab and a front-loading battery drawer for replacement without removing the alarm from the bracket. Mount the bracket to any standard wiring junction box and use the large mounting base to cover imperfections in drywall. The plastic dust cover protects the alarm from debris and (2) tamper-resistant locks prevent unwanted alarm or battery removal. For maximum protection, install an alarm inside every bedroom, outside every sleeping area and on all levels of the dwelling. The USI Electric MCN108 Hardwired Carbon Monoxide and Natural Gas Smart Alarm comes with a 7 year limited warranty.
Warranty: 7 year Limited Warranty
Alarm Power Source: 120 volt hardwired & 9 volt battery backup
Alarm Sensor Type: Metal Oxide Carbon Monoxide Sensor
Manufacturing Credits: ISO 9001 certified factory, UL listed & CSFM listed
Easy install MCN108 - 03/16/2018
Reviewer: William Hearn
Looked for a replacement for a builder installed wired system and wanted the same brand. USI customer service rep recommended the MCN108. Item worked perfectly and very easy install. Highly recommend
Excellent Customer Service - 03/06/2018
Reviewer: Roger Close
I received exceptional assistance and service from Michele Metcalf in Customer Service and Jenna McLaughlin with the Universal Security Store. Gas detectors seem to be working well!
Carbon Monoxide - 02/26/2018
Reviewer: Shahla Didehbani
They work great!
AAA+ - 02/15/2018
Reviewer: james weiner
Quick, good product
Does Not Fit Well - 02/06/2018
Reviewer: Charlene Mason
We purchased this model MCN108 because we were told it was the correct replacement for an older model CD-9385. However, even with changing to the new universal bracket, we found that the alarm does not fit as snugly against the ceiling as the old model did.
co2 alarm - 01/18/2018
Reviewer: susan mclaughlan
Co2 - 01/13/2018
Reviewer: Thomas Dyszkiewicz
Easy install, web site was easy to use and delivery was prompt
Co2 - 01/12/2018
Reviewer: Thomas Dyszkiewicz
Easy install, web site was easy to use and delivery was prompt
Reviewer: Dennis Clairmont
Easy to install
Reviewer: Jean Scavone
Easy to install. It is great!
Reviewer: terri huber
Our old alarms were 8 years old when they went out. I called customer service and spoke to Michelle M. What a great CS person she called me back and sent an email with the replacement number. When I received it, what a perfect fit. Thanks Michelle M
Replacement Products - 11/06/2017
Reviewer: Melissa Wilder
We replaced all Carbon Monoxide and Natural Gas Smart Alarms with Battery Backup MCN108. Product was shipped in a timely manner, questions to customer service was extremely responsive and the product was easy to replace upon installation
Reviewer: Lawrence Long
no issues....simple replacement. thanks, Larry.
Wonderful replacement - 08/17/2017
Reviewer: Arne Hawkins
We built a new home and the builder installed Universal products. After 7 years both stopped working so I got on Amazon and ordered two replacements. Not long after, one stopped working and when I checked the manufacturing date, it was 5 years old already. Order direct from Universal and avoid additional costs!
Reviewer: Troy Smith
Quick delivery and easy install.
Replacement - 05/08/2017
Reviewer: David Provan
Easy to install and working well.
Reviewer: Ron Brandon
I like the addition of a back up battery.
Updated Model - 10/05/2016
Reviewer: Carole Schadoff
Great replacement for my Model CD-9485. Perfect fit. Very pleased with customer service.
Reviewer: Gail Carlson
Was a perfect fit for the older model that had to be replaced.
good value - 06/08/2016
Reviewer: John Milcetic
this product was a good value and was perfectly suited to my needs. Easy installation and work perfectly in tests.
good product - 05/05/2016
Reviewer: ben schlesinger
Combo CO & Nat Gas Alarm - 04/19/2016
Needed replacement CO detectors for existing USI CO monitors 8 years old. Nice to see natural gas detection functionality is now integrated into a single unit.
Reviewer: Marina Kelly
Reviewer: Wallace Zawierucha
Perfect! Fit the existing mounting bracket.
So far so good!
Reviewer: Don Schelling
Good product. I order four at a time as I am in real estate and give them to my clients. They really appreciate it. Thank you.
Reviewer: Tammy Browning
I can not find these in any local store and so I am glad I have found a store I can rely on to replace my carbon monoxide detectors. A quick fix and lasts a long time.
USI Electric Hardwired 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm - 10/02/2015
Reviewer: Charles Cozewith
This alarm was purchased to replace a similar alarm that no longer worked. It installed easily and there were no problems with the set up procedure which was well described in the product info.
GREAT - 06/23/2015
Reviewer: Glen Inselman
THEY WERE VERY KNOWLEDGABLE, QUICK, EFFICIENT AND COURTEOUS
Excellent service & product - 06/15/2015
Reviewer: Pamela Jackson
After communicating on the online chat, I was advised the type product I needed. It arrived in a timely manner & was a perfect solution to my problem.
Reviewer: Gary Bailin
This item was installed with great ease due to the compatible nature of the product. The CO detector is more current compared to the old, expired version obtained 7.5 years ago.
We also ordered the smoke detectors and look forward to ensuring the safety of our family. Shipment was in a timely fashion.
Debby - 05/12/2015
Reviewer: Debby Hatchett
Great company to work with. They kept me updated on when product would be delivered. Product worked perfect.
Carbon monoxide detector - 05/05/2015
Reviewer: Michael Schaewe
I replaced my CO meter with this new device. It shipped quickly, was well-packaged and was incredibly easy to install.
In all, a great transaction and nice device.
Reviewer: karen patterson
Came quickly,easy to hook up
Reviewer: steve kawakami
The product fit perfectly to replace the previous model that it replaced.
Looks and works great!! - 01/06/2015
Reviewer: Robert Pettinato
Works great, I have this throughout the house smoke detectors and carbon monoxide. Unfortunately my tenant took this one with them when they left or broke it ect, this was the perfect replacement..
Q: WHAT LEVELS (PPM) OF CARBON MONOXIDE CAUSE AN ALARM?
A: Carbon monoxide alarms are designed to alarm before the average healthy adult feels symptoms. Since you cannot see or smell CO, never assume it's not present. Underwriters Laboratories Inc. Standard UL2034 requires residential CO alarms to sound when exposure times and exposure levels of CO in the chart below. CO alarm levels are measured in parts per million (ppm) of CO over time (in minutes). The UL2034 Required Alarm Points are:
If the Alarm is exposed to 400 ppm of CO, it must alarm between 4 and 15 minutes.
If the Alarm is exposed to 150 ppm of CO, it must alarm between 10 and 50 minutes.
If the Alarm is exposed to 70 ppm of CO, it must alarm between 60 and 240 minutes.
Q: IS CARBON MONOXIDE HEAVIER THAN AIR?
A: Carbon monoxide is not heavier than air. A carbon monoxide alarm should be installed in a location where the alarm will stay clean, and out of the way of children or pets. Refer to the user's manual for specific installation requirements.
Q: WHERE SHOULD I INSTALL MY CARBON MONOXIDE ALARMS?
A: It is very important to install a carbon monoxide alarm outside each separate sleeping area, and for maximum protection, install one in every bedroom. Many states now require installation of a carbon monoxide alarm inside 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. Install carbon monoxide alarms a minimum of 10 feet from sources of humidity like bathrooms and showers. In multiple-story dwellings, install one carbon monoxide alarm on every level. If you have a basement, install a carbon monoxide alarm at the top of the basement stairs, and in each separate sleeping area.
Q: WHAT AREAS SHOULD I AVOID INSTALLATION OF A CARBON MONOXIDE ALARM?
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 areas 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, heavy furniture 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.
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