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

15 customer reviews

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  • 2-in-1 alarm that provides double the protection with a single installation to protect against carbon monoxide and natural gas
  • 120-volt AC/DC hardwired alarm with backup battery is suitable for houses, apartments and mobile homes
  • Mount the bracket to any standard wiring junction box and use the large mounting base to cover imperfections in drywall
  • Features a quick activation pull-tab and a front-loading battery drawer for replacement without removing the alarm from the bracket
  • Comes with a 7 year limited warranty
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11 new from $28.33 1 used from $25.59

Frequently Bought Together

USI Electric MCN108 Hardwired 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery Backup + Universal Security Instruments 1204 Wire-In Smoke Alarm with Battery Backup + USI Electric MICN109 Hardwired 3-in-1 Smoke, Carbon Monoxide and Natural Gas Alarm
Price for all three: $90.76

These items are shipped from and sold by different sellers.

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Product Description

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. With state-of-the-art manufacturing facilities, Universal Security Instruments continues to launch revolutionary new products and technologies with the mission of always working to keep families protected. Visit www.amazon.com/universalsecurityinstruments for more information on Universal Security Instruments and our extensive line of products.

Product Information

Technical Details
Part Number MCN108
Item Weight8 ounces
Product Dimensions5.5 x 1.8 x 5.5 inches
OriginChina
Item model numberMCN108
Batteries:1 9V batteries required. (included)
Power Sourcedirect-wired-electric
Item Package Quantity1
Batteries Included?Yes
Batteries Required?Yes
Average Battery Life4380 hours
  
Additional Information
ASINB00AO4AKX4
Best Sellers Rank #71,986 in Home Improvement (See top 100)
Shipping Weight9.6 ounces (View shipping rates and policies)
Domestic Shipping Item can be shipped within U.S.
International Shipping This item is not eligible for international shipping. Learn More
Date First AvailableDecember 11, 2012
  
Warranty & Support

Product Warranty: For warranty information about this product, please click here
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From the Manufacturer

About Universal Security Instruments

Universal Security Instruments is a U.S. based manufacturer of high quality, easy-to-install home safety products. Founded in 1969, Universal Security Instruments has over 40 years of heritage in providing home safety products for families. With state-of-the-art manufacturing facilities, Universal Security Instruments continues to launch revolutionary new products and technologies with the mission of always working to keep families protected.

Universal Security Instruments BF-704HB 70 CFM Bathroom Ventilation Fan

Product Descriptions

The USI Electric BF-704HB Bath Exhaust Fan combines high function with practical design to keep air moving and effectively pull out moisture. This bath fan has a precision balanced blower wheel, a decorative molded grille that will match any decor and the attachment for a 250-watt BR40 infrared heat lamp (not included). The unit comes equipped with a 70-CFM 3.5-sones motor that is custom-designed for bath fans and permanently lubricated so that it will not get louder over time. Galvanized steel housing on the fan is reinforced to resist humid conditions and changing attic temperatures. The 4-inch duct adaptor with built-in damper also reduces rattle noise and prevents back drafts from entering the room. Keyhole slots on the blower bracket simplify installation so you can have a fully-functioning bath fan in no time. This bath fan will return the bathroom to a normal humidity level and prevent mold, mildew and odors from taking over your living space. The USI Electric BF-704HB Bath Exhaust Fan comes with a 3 year limited warranty that protects against defects in materials and workmanship.

  • Bath Exhaust Fan combines high function with practical design
  • Comes equipped with a 70-CFM 3.5-sones motor
  • Includes 4-inch duct adaptor with built-in damper
  • Includes the attachment for a 250-watt BR40 infrared heat lamp (not included)
  • Comes with a 3 year limited warranty

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

4 of 4 people found the following review helpful By Don on April 29, 2014
Verified Purchase
This is the second of these the I bought, because the first one failed after about 6 months in service. I purchased the same thing again for ease of replacement, but this will be the last one if it fails early. The seller offered no warranty.
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3 of 3 people found the following review helpful By BluesBrother on February 26, 2014
Verified Purchase
My house had three of these units pre-installed (by the builder) when I purchased it. These are wired-in A/C units with battery backup, and detect both CO and natural gas.

The existing units began failing (false alarms) about a year after I moved in. Assuming they'd never been replaced, that means they were approximately 5 years old. These units are supposed to last for up to 7 years, so giving them the benefit of the doubt, I replaced all of them.

Now, less than a year later, two of the replacement units (manufacture date: October, 2012) have also failed: false natural gas alarms. One went off while we were away from home, and another went off at 3 AM in the morning. And, you can't silence a natural gas alarm (presumably, due to the potential explosion hazard); you have to disconnect the unit from A/C power AND remove the 9v battery. To prove that these were false alarms, I took the failing units outside in fresh air, re-installed the battery, and within 5 minutes, they were alarming again.

I would like to replace all of these units with a different brand (Kidde, First Alert, etc.) but the USI MCN108 is the only unit I've been able to find that is a combo CO/gas alarm, wired-in, with battery backup. And, of course, it "fits" the existing mounting ring.

So, I've reluctantly ordered replacement MCN108's -- for the second time. Here's hoping they "last" this time.
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2 of 2 people found the following review helpful By Lisa on December 8, 2013
Verified Purchase
Exactly what I was looking for. I needed to replace an older unit that had reached the end of its service life. This was a similar model that allowed me to use the same mounting plate I use on the expired model. Easy switch.
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3 of 4 people found the following review helpful By Sergei Kolpakov on August 29, 2013
Verified Purchase
Bought 2 from amazon. Price was point was slightly better than in home depot . the problem is they are making noise pointing on low battery. Replaced battery that came with the unit but that didn't resolve the issue ...
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By Pamela Ross on February 17, 2015
Verified Purchase
I have replaced the first one I bought in November 2012 a year later November 2013. Company replaced it after two months when it kept going off. Put a new one in a week and one day and it is bad too. Went through all the problems it could be with them and don't have any of the ideas they suggested. Company will only replace it with the same model. No way I'm shopping for another model.
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Verified Purchase
I've ordered this item twice as a replacement to an older model that had failed, with the exact same results. After about a week, the device starts giving "low battery chirps". I've changed the battery out to the best 9 volt battery I can buy, and I continued to get the same results. Now, I'm at a loss as to what replacement device might even be available; this may force me to make a completely new installation, which is not a happy thought.
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Verified Purchase
This product is as stated and no surprises. It replaced an old and out dated one with no modifications and so far working fine.
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Verified Purchase
After 10 yrs the original equipment installed in my house failed. I have about 7 of these throughout the house. This was the recommended replacement per manufacturer of the initial one since that model was not longer produced. Installed in a snap and fit the existing mount perfectly.
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