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Kidde Nighthawk Digital Carbon Monoxide/Gas/Propane Detector w/ Battery Backup EXPIRED

$30
$39.99
+ Free S/H
+30 Deal Score
10,329 Views
Amazon has Kidde Nighthawk Digital Display Carbon Monoxide/Gas/Propane Detector w/ Battery Backup on sale for $29.99. Shipping is free.

Thanks to community member odbal for finding this deal

Note, must be sold/shipped by Amazon

About the Product
  • Easy installation
  • CO detector with digital display & alert modes; 85 decibel alarm alerts of fire
  • Electrochemical sensor technology - detects carbon monoxide & other forms of combustible gas such as propane & natural gas
  • Combo smoke and gas alarm is powered by a 120VAC wall outlet w/ 9V battery backup
  • Low battery warning feature indicates when the battery needs replacement
  • UL Certified
  • Two alarms in one detects carbon monoxide and explosive gas
  • Three convenient mounting options
Warranty
  • Includes a 5-years limited warranty w/ purchase of this product

Editor's Notes & Price Research

Written by
  • Price Research: Purchase this unit today and save $10 Off (25.01% Savings) from the original list price of $39.99. This product recently dropped in price and we haven't seen it this low in years
  • The Kiddie offers a continuous digital display that shows you the level of carbon monoxide (if any) as well as sensing if gas is present; the gas sensor is a metal oxide sensor designed to detect natural gas (methane) or propane
  • Product is returnable until January 31, 2022
  • Offer valid while promotion/supplies last
Additional Note
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Original Post

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Edited December 1, 2021 at 03:23 AM by
Amazon is currently offering the Kidde Nighthawk Combination Explosive Gas Detector & Carbon Monoxide Detector [amazon.com] for $29.99 >Now $31.98, which is its lowest price since 2012 and 33% lower than its average price of $44.69.

This was posted by LO6932 on November 22, but interest in the product has been much stronger in the comments section of the frontpage Kidde Plug-In Carbon Monoxide Detector w/ Battery Backup deal. There, user giantbruin pointed out that they were able to get an additional 30% off with the current Amazon/Amex Membership Rewards deal. Alternatively, user hko got 40% off with the current Amazon/Discover Cashback deal.

The FP Kidde Carbon Monoxide Detector deal comments holds a lot of useful and educational information about the difference between CO and explosive gas detectors, the need for each, and when/where to use them. I am a firefighter and have been fielding a lot of those questions, so I'll post my initial explanation below in hopes that it can be helpful here as well. The more we all know, the safer we can be:
Quote :
Any house using natural gas (generally methane) or propane should have explosive gas alarm(s) in addition to carbon monoxide detectors. Carbon monoxide is created by partially burned fuel releasing CO instead of CO2, and its source can be anything from a faulty pilot light, to a running car in an attached garage, to burning embers in the bottom of an ash bucket next to a wood stove (which can still generate enough CO to kill). It is colorless, odorless...undetectable except by carbon monoxide detectors. Honestly, every house should have at least one CO alarm, even if there aren't any presumed sources.

Explosive gas will not trigger carbon monoxide detectors, even at high concentrations. Usually people rely on the bad smell (like rotten eggs) that is added to natural gas/propane as a warning system. However, we have seen situations where gradual accumulation prevented detection due to nose blindness. A few years ago a man and woman came home from date night and could smell natural gas in their driveway as they pulled up. Their two teenage boys were at the back of the small house (1500 sq ft) playing video games and hadn't noticed a thing. One of them had nudged a kitchen stove burner knob and it was hissing out gas, filling the house. After that, they got one of the these alarms [amazon.com] and put it in their kitchen. Tested by leaving a burner slightly on, unlit...the alarm went off in under five minutes. I have the same unit in my own kitchen.

One last important point: if you smell gas in your house, do not start opening windows to air it out. Explosive gasses are only explosive at relatively low concentrations with air. Propane is only about 10%; methane around 15%. By the time you smell it, it's possible your concentrations could be higher than that. Opening windows could pull you back into the "danger zone". Don't ventilate; evacuate. Call the fire department. We can determine the concentrations and ventilation needs, as well as speed ventilations with fans that are low-risk for causing explosions.

Remember, as a general rule (in the US at least):
• We won't charge you for our help
• You are not bothering us
• If anything, you are probably making our day more interesting
• It is good practice for us
• We are then on-hand in case anything does explode

Alright, enough rambling from me. Be safe, everyone.
https://www.amazon.com//dp/B0002EVNJ6
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This comment has been rated as unhelpful by Slickdeals users
Joined Apr 2010
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#3
No can do with the explosive gas detector. After my dinner of Bush's baked beans I'll be setting that thing off all night long!
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#4
Quote from michael00baker :
No can do with the explosive gas detector. After my dinner of Bush's baked beans I'll be setting that thing off all night long!
Taco alarm bell
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#5
Thanks, I had no awareness of the prior hot deal. Used chase rewards for $15 off as well.
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#6
These are very sensitive and detect minuscule leaks. The local HVAC wouldn't come out until the FD checked everything. One pipe needed tightened was all.

It's a good peace of mind.
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#7
Be aware that CO is lighter than air and propane is heavier than air. It can detect multiple kind of gas, but probably not at the same time because of its placement
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#8
I had an explosive gas detector upstairs many years ago. Turned out my then wife was an alcoholic. I decided to pour out all the alcohol we had in the kitchen sink downstairs. There was so much alcohol in the house that I poured out, that the explosive gas detector upstairs went off about halfway through emptying all the bottles. And the sink was draining the entire time. Crazy.
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#9
Quote from jkloisdafoiwdaf :
Be aware that CO is lighter than air and propane is heavier than air. It can detect multiple kind of gas, but probably not at the same time because of its placement
But if you have gas heat or a gas stove or oven, natural gas is mostly methane, which is also lighter than air (and lighter than carbon monoxide also). I think that nearly all apartments, and many private homes, are more likely to have natural gas on premises than would have propane.
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#10
Didn't know there was a difference between CO and gas as far as detectors go I thought CO detector would sense gas. We are switching from electric to gas range so I just bought 2 of these. One for the furnace and one for the kitchen. Thanks.
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#11
This WILL detect fart gas. I'm not making a joke. False alarms will be a constant nuisance.
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#12
Quote from b-t-1 :
This WILL detect fart gas. I'm not making a joke. False alarms will be a constant nuisance.
So best place it where you won't fart like furnace or behind the oven.
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#13
Quote from jkloisdafoiwdaf :
Be aware that CO is lighter than air and propane is heavier than air. It can detect multiple kind of gas, but probably not at the same time because of its placement
CO is very, very slightly lighter than air...a difference of less than half the molecular weight of hydrogen, the lightest known gas. In the face of all other environmental variables (air flow, temperature variances, humidity, etc), that difference becomes arguably one of the least contributing factors to where CO travels. It would be more accurate to say that CO usually diffuses with air. As for whether one location is perfect for this to detect both gases with equal effectiveness, I agree that there may not be one. Personally, I use it for its explosive gas abilities...CO detection is secondary to my primary units throughout the house. That said, if this is plugged into a kitchen outlet above a countertop, it would be well-positioned to catch either explosive gas leaks or CO from the stove. Same with a mid-wall outlet near a hot water heater in a garage.

Definitely shouldn't be one's only line of defense for CO detection, but should absolutely be incorporated on top of other CO detectors for its explosive gas detection.
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Last edited by odbal December 1, 2021 at 02:26 AM.
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#14
Quote from b-t-1 :
This WILL detect fart gas. I'm not making a joke. False alarms will be a constant nuisance.
You got such an atomic fart!!! That's WMD. You will need a Dick Cheney / Bush Jr. detector.
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#15
One FF post and now everyone suddenly needs 'explosive gas detector', laugh out loud
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