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Not sure why the post only mentions Amazon.
Same price in-store at Walmart.
https://www.walmart.com/ip/Kidde-...2/39360952
11/29 Amazon has dropped price to $11.84 (looks like to match Walmart.com price).
Link to carbon monoxide detector with digital display for $18.98 (I have one in my MBR and use the basic one for my other BRs): DEAD - NOW $29.90
Kidde Nighthawk Carbon Monoxide Detector, AC-Plug-In with Battery Backup, Digital Display
https://www.amazon.com/Nighthawk-...00002N86A/
https://www.walmart.com/ip/Kidde-...arm/870340
Link to combined carbon monoxide and gas detector for $29.99 (I have this one next to my gas dryer): DEAD - Now $34.50
Kidde Nighthawk Carbon Monoxide Detector & Propane, Natural, & Explosive Gas Detector, AC-Plug-In with Battery Backup, Digital Display
https://www.amazon.com/Nighthawk-...0002EVNJ6/
Amazon has raised prices, but walmart.com still has for $11.84.
https://www.walmart.com/ip/Kidde-...hbdg=L1700
12/6 After raising price, Amazon has dropped price again to $11.84 to match Walmart.com.
expiredvsspam posted Nov 23, 2021 02:08 AM
Item 1 of 5
Item 1 of 5
expiredvsspam posted Nov 23, 2021 02:08 AM
Kidde Plug-In Carbon Monoxide Detector w/ Battery Backup
$12
$30
60% offAmazon
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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.
Per EPA.gov
https://www.epa.gov/indoor-air-qu...e-detector
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Anyway, CO detectors are very sensitive. Lighter or heavier than air, CO will fill the room eventually. Before CO density reach harmful level, CO detector goes off wherever it is placed.
Edit
So whats the difference?
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The density of CO at 25C is: 1.145 kg/m^3
CO is slightly less dense, and will raise up in still air. However, the densities are so close that it effectively mixes with air with even slight disruption (like a furnace vent blowing), so it doesn't matter where you put the detector.
Per EPA.gov
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https://www.amazon.com/Nighthawk-...=hi&sr=1-4 [amazon.com]
I've read it's better to get separate detectors though as they may expire at different times.
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.
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 alarms in the link above 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.
Also, I bought one of the recommend explosive gas detector that someone recommended, would you recommend the same? on top of that where would you recommend that I place it? Right right I have my unused fire place gas pipe just protruding into the house (by maybe six inches) I place the detector directly under it hoping it catch it.
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Also, I bought one of the recommend explosive gas detector that someone recommended, would you recommend the same? on top of that where would you recommend that I place it? Right right I have my unused fire place gas pipe just protruding into the house (by maybe six inches) I place the detector directly under it hoping it catch it.
Call FD? Honestly, I would call them in either event (outside or inside). Dispatch will also notify the appropriate natural gas company and get someone out there...and while I'd like to say the companies respond faster when dispatch calls, YMMV. Around here, the gas company is great, but electric companies take forever (I once stared at a power line on a tree branch for 90 minutes before a worker showed). But in either event, the fire department will be able to respond fastest, can secure the scene/assess risk while awaiting the gas company, may be able to temporarily shut off the gas themselves (depending on the setup in the area), and will be on-hand if gas ignites. Basically, if you smell/detect a gas leak and have reason to believe it is not minor and fixable by you, you should clear the area and call 9-1-1. Better to have us and not need us than to need us and not have us.
Placement: directly under the gas pipe is probably fine if it is fairly close by. Methane is lighter than air; propane is heavier than air...but when leaks occur, usually neither is just strolling into the area. They are being ejected from a pressurized tube, which means they will shoot in a given direction before drifting. How close to the pipe is the alarm you placed under it? I'd say as long as it's within 5 feet or so, you're probably fine. Those things are quite sensitive. I was able to get detection by holding down a cigarette lighter's gas button and putting it about six inches from the detector.
Call FD? Honestly, I would call them in either event (outside or inside). Dispatch will also notify the appropriate natural gas company and get someone out there...and while I'd like to say the companies respond faster when dispatch calls, YMMV. Around here, the gas company is great, but electric companies take forever (I once stared at a power line on a tree branch for 90 minutes before a worker showed). But in either event, the fire department will be able to respond fastest, can secure the scene/assess risk while awaiting the gas company, may be able to temporarily shut off the gas themselves (depending on the setup in the area), and will be on-hand if gas ignites. Basically, if you smell/detect a gas leak and have reason to believe it is not minor and fixable by you, you should clear the area and call 9-1-1. Better to have us and not need us than to need us and not have us.
Placement: directly under the gas pipe is probably fine if it is fairly close by. Methane is lighter than air; propane is heavier than air...but when leaks occur, usually neither is just strolling into the area. They are being ejected from a pressurized tube, which means they will shoot in a given direction before drifting. How close to the pipe is the alarm you placed under it? I'd say as long as it's within 5 feet or so, you're probably fine. Those things are quite sensitive. I was able to read detection of holding down a cigarette lighter's gas button and putting it about six inches from the detector.
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