Nonsense. A reading of 10 has no meaning and many
CO units can't detect anything under 25. Let the
guy read is manual. No alarm is even sent unless
the reading gets above 50 for a long period. A
peak reading doesn't even begin until above 10. A
reading of 10 has no meaning, except that the unit
may have malfunctioned.
What's the nonsense part? My CO detector is meaningful at about 11 or
so. It also doesn't give peak readings; if I smoke up the basement, the
CO reading goes up (15, or 20-something if it's really smoky) and then
drops as I air it out. I told him not to worry about it, OTOH long-term
exposure to low levels of CO, while not dangerous, can still cause
malaise and flu-like symptoms.
BTW, the one time my detector went off and there actually was a
dangerous level of CO, there was no smoky smell at all. CO was over 100
and rising rapidly.
Read your manual. It doesn't mean anything and
the detector can't detect a reading that low, so
10 is the same as 0. Mine read 10 for a while,
went bonkers when the power went off, I replaced
the battery (it ran down rather fast with the
power off). Reads 0 all the time now. When you
unplugged the thing did you take the battery out?
If not, you need to and also replace the battery.
I read the manual and called the manufacturer. The units that are
showing 10ppm need to be replaced. The tech said to believe the new
unit which reads zero. I've moved the new unit around the house and
next to the others and it always stays at "0" even next to a unit
According to OSHA a CO concentration of up to 50ppm for an 8-hour
period is okay for a healthy individual. A concentration of 200ppm
will cause nausea, headache, fatigue. A concentration of 800ppm will
cause death in 2-3 hours. I know that when CO2 is present there is
also a (much) smaller amount of CO present, both are
FYI: Common sources of CO include:
Gas appliances not properly ventilated
Using an oven for heating the house
Using a propane or charcoal grill indoors
Running a gasoline engine in an enclosed or partially-enclosed area
Leaving a house door open to a garage that has a vehicle running
I appreciate all your responses and encourage everyone to have a CO
detector in addition to a smoke detector on all levels of your home.
Amazing what one can learn by RTFM, isn't it?
And yes, it is a good idea to have CO detectors.
BUT, get the ones that have the digital readouts. The other ones that
scream only when the levels are high aren't as good. You might have levels
low enough to give you headaches, but not low enough to set the alarm off.
Or, it goes off after you have gone unconscious.
I have always pushed people towards the digital units.
It's your life. Spend a few extra bucks. A family of four we knew died
after moving a generator into their garage. No one has a clue as to what
they were thinking, but they're just as dead. (Happened in Las Vegas about
a year ago.)
A CO detector, even the cheapo variety would have saved their lives.
"Protect Your Family from a Silent Killer
Take steps now to protect your family from the unseen danger of carbon
monoxide. Install a carbon monoxide detector in your house, and plan to
check its battery every time you check your smoke detector batteries.
Carbon monoxide is odorless and colorless. If it builds up in your home
it can cause illness or even death-more than 500 Americans are killed
by carbon monoxide poisoning every year. Any heater that burns fuel,
such as your furnace, gas water heater, or a portable butane or gas
heater, can leak carbon monoxide and should be inspected every year.
In addition to having a working carbon monoxide detector in your house,
you should never burn anything in a stove or fireplace that isn't
vented properly, never heat your house with a gas oven, and never run a
generator in an enclosed space (like your basement) or outside a window
where the exhaust could blow indoors, even if the power goes out.
Carbon Monoxide Detector
When you're driving, don't warm your car up in a closed garage. If
your garage is attached to your house, close the door to the house even
if you open the garage door while you warm up the car. And when it
snows, be sure to clear any snow out of your car's tailpipe-if the
pipe is blocked exhaust can back up inside your car.
For more information on carbon monoxide poisoning, go to:"
As has been said;
1. 10 is very low
2. the detector holds its peak reading. You need to reset it to see
what the current reading is.
3. I have attached garage. If I back in, the detector immediately goes
through the roof as its in the basement just beneath where the garage
butts the house. So if this is your case, pay attention to your cars
and dont run them with garage door open.
"Then said I, Wisdom [is] better than strength: nevertheless the poor
Stick one of those that read 10 outside for awhile. If it still reads
10, it's probably defective. If not, you better get some help. If
all the appliances are shut off, I sure dont see where the CO would be
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