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3-Pack Kidde Nighthawk Plug-In Carbon Monoxide Alarm w/ Battery Backup EXPIRED

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$89.97
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Tools.Woot has 3-Pack Kidde Nighthawk Plug-In Carbon Monoxide Alarm w/ Battery Backup (KN-COPP-3) on sale for $67.99. Shipping is free for Prime Members, otherwise is $6 flat-rate. Thanks CChoiVA
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  • The digital readout of the Kidde Plug-In Digital Carbon Monoxide Alarm with 9-Volt Backup continuously displays carbon monoxide levels from 30 to 999 parts per million (PPM) and will sound an 85 dB alarm when dangerous levels are reached. Protection continues during power outages thanks to a 9-volt battery backup. -slickdewmaster
  • This also matches a previous Frontpage deal from July.
  • Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
  • If you're not a student, there's also a free 1-Month Amazon Prime trial available. -Corwin

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Edited August 15, 2019 at 12:49 PM by
Tools.Woot [woot.com] has 3-Pack Kidde Nighthawk Plug-In Carbon Monoxide Alarm w/ Battery Backup (KN-COPP-3) for $67.99. Shipping is free w/ Amazon Prime, otherwise shipping is $6 flat rate.
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It's not a bad idea to monitor for explosive gasses, but it is significantly more common to have a furnace problem that causes dangerous CO levels than it is to have a pure gas leak. In most cases you will smell the odorizer agent in natural gas well before it gets close to the LEL concentration that could allow for an explosion. Monitoring for explosive gasses is not a bad idea, but it is much more important to have adequate CO monitoring.
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#3
HD has them for about $25 each, so this is about $3 savings each if you have Prime and $1 each if you don't.
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#4
Don't forget your 5% back with your Prime Visa, too.
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#5
Quote from BBQ_Bob
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HD has them for about $25 each, so this is about $3 savings each if you have Prime and $1 each if you don't.
They are $40 each at Home Depot, when you click the $25.74 price from Google it changes to $40.

https://www.homedepot.com/p/Kidde.../100045210
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#6
I wonder how many of these I need for a 2-story house with one gas furnace on each floor.
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Quote from EJ42
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I wonder how many of these I need for a 2-story house with one gas furnace on each floor.
You should have a minimum of one per floor in your case. I'd put one near each furnace and use the third near or in a sleeping area since leaks overnight are the biggest life threat with CO.
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Quote from Roamingtxn
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You should have a minimum of one per floor in your case. I'd put one near each furnace and use the third near or in a sleeping area since leaks overnight are the biggest life threat with CO.
I just checked, and Amazon has a 4-pack for only $97.79. After tax and shipping, that works out to only $0.80 more each to get them from Amazon, and I don't end up with two extras. I figure I can put one in the upstairs hall, one in the master bedroom, one downstairs hall near garage, and one in kid's bedroom. Guestroom can fend for themselves.
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Quote from EJ42
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I wonder how many of these I need for a 2-story house with one gas furnace on each floor.
I dunno. If you're really using it for Gas detection. You probably want to go all the way.
Get the "Monoxide and Explosive Gas Detector" version where it monitors both Gas and CO leaks.

The CO alarm is more for you left you car running way too long in the garage or your furnace is not going to explode but killing all the oxygen.
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Quote from CChoiVA
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Tools.Woot [woot.com] has 3-Pack Kidde Nighthawk Plug-In Carbon Monoxide Alarm w/ Battery Backup (KN-COPP-3) for $67.99. Shipping is free w/ Amazon Prime, otherwise shipping is $6 flat rate.

Costco has the First Alert brand 3 for $49.99. Which one is better- the one with number display or without??? Also, the Costco brand uses battery only versus the Kidde Nighthawk plug-in with battery back-up. Any suggestions.. thanks in advance!
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Last edited by srisri1966 August 14, 2019 at 01:12 PM.
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Quote from spamdie
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I dunno. If you're really using it for Gas detection. You probably want to go all the way.
Get the "Monoxide and Explosive Gas Detector" version where it monitors both Gas and CO leaks.

The CO alarm is more for you left you car running way too long in the garage or your furnace is not going to explode but killing all the oxygen.
It's not a bad idea to monitor for explosive gasses, but it is significantly more common to have a furnace problem that causes dangerous CO levels than it is to have a pure gas leak. In most cases you will smell the odorizer agent in natural gas well before it gets close to the LEL concentration that could allow for an explosion. Monitoring for explosive gasses is not a bad idea, but it is much more important to have adequate CO monitoring.
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Quote from darkNiGHTS
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They are $40 each at Home Depot, when you click the $25.74 price from Google it changes to $40.

https://www.homedepot.com/p/Kidde.../100045210 [homedepot.com]
HD must have regional pricing on this since I was able to put an order through for $25.74 plus tax with in store pick-up.
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Quote from spamdie
:
I dunno. If you're really using it for Gas detection. You probably want to go all the way.
Get the "Monoxide and Explosive Gas Detector" version where it monitors both Gas and CO leaks.

The CO alarm is more for you left you car running way too long in the garage or your furnace is not going to explode but killing all the oxygen.
I would get one of the explosive gas detectors, but I eat too much Mexican food. Frown
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Quote from Roamingtxn
:
It's not a bad idea to monitor for explosive gasses, but it is significantly more common to have a furnace problem that causes dangerous CO levels than it is to have a pure gas leak. In most cases you will smell the odorizer agent in natural gas well before it gets close to the LEL concentration that could allow for an explosion. Monitoring for explosive gasses is not a bad idea, but it is much more important to have adequate CO monitoring.
This is correct. Any natural gas, oil, or wood burning appliance can have problems with incomplete combustion and generate CO if they aren't vented properly and regularly inspected and maintained. In many states/municipalities it's also required by code to have them on each floor if you have any fuel burning appliances.
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Quote from srisri1966
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Costco has the First Alert brand 3 for $49.99. Which one is better- the one with number display or without??? Also, the Costco brand uses battery only versus the Kidde Nighthawk plug-in with battery back-up. Any suggestions.. thanks in advance!
The display is handy if you want to see information like current PPM of CO and peak detected level. However, most people probably won't look at that very often.

As far as power sources go, you have more limited placement options for a device like the one in this thread because it must be placed in a power outlet. A purely battery powered unit like the one you mentioned from Costco can be placed anywhere. However, most people are not diligent about replacing detector batteries which leads to non-functional detectors.

My personal recommendation would be to look for a sealed detector powered with a 10 year lithium battery. It has the most flexibility with the least maintenance. All detectors must be replaced at least every 10 years, sealed units just don't require battery changes.
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