USI Electric Hardwired 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery Backup (MCN108)

  • USI Electric Hardwired 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery Backup (MCN108)
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2-in-1 CO + Natural Gas | Smart Alarm
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Regular: $54.95
Price: $46.95
You Save: $8.00 (15% Off)
Quantity
  • 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
  • Test/Reset Button
  • 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.
Product Details
  • 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
  • Packaging: Easy Open Box Packaging
  • Product Dimensions (W x H x D): 5.75 x 5.75 x 1.75 in.
  • Product Weight: 0.63 lbs.
Product Specs
UPC:
042741001083
MPN:
MCN108
Category:
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.

USI Electric Hardwired 2-in-1 CO and Natural Gas Alarm, Battery Backup (MCN108) Video
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Customer Reviews

4.9

Average score based on 67 reviews

Rating: 4.9/5Rating: 4.9/5Rating: 4.9/5Rating: 4.9/5Rating: 4.9/5
Write A Customer Review Review
USI Electric Hardwired 2-in-1 CO and Natural Gas Alarm, Battery Backup (MCN108) Reviews

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 07/16/2022 by Barry S

CO and Natural Gas Detector

Item performed as stated

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 06/16/2022 by Helen B

GOOD⭐️

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 02/27/2022 by David L

USI Electric Carbon Monoxide and Natural Gas

This alarm replaced my previous hard-wired USI Carbon Monoxide alarm. It was reasonably priced and delivered to my home on time. It was very easy to install as the electrical connector was the same as my previous model. It also detects Natural Gas as an added bonus. Overall, I am very pleased with this purchase and would recommend it.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 12/31/2021 by Alberto N

Good Experience

Good experience ordering on website. Delivery of product and product itself.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 11/17/2021 by Kris J

Good product

Product works great

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 11/09/2021 by Ross K

Smoke replacement

I was pleasantly surprised this company was still producing after there product has been in homes.for 10 years. Thanks for providing me a 1 for 1 swap option you saved me a lot of time.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 10/21/2021 by James D

USI Product and Service

Typical quality product from USI, with a good selection of options and ease of installation. I continue to purchase from Universal because of their excellent customer service, very prompt order fulfillment and shipping.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 04/12/2021 by Michael A

Outstanding alarm

So I was trying to exactly match the CO2/gas alarm we had and this one was the exact match. The alarm arrived promptly and works great!

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 11/12/2020 by Karl Gontkof

MCN108 2-in-1 CO2 & Natural Gas Alarm

I have used the USI 2-in-1 CO2 and Natural Gas models for over 15 years. The product works well, however it doesn't always live a 7 yr life

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - Reviewed: 07/31/2020 by Debra Stec

Love them. They work really good.

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