After shopping around much, purchased a nighthawk digital for $33 from
These are expensive and I'm wondering if the best placement would
be high in the hallway near the bedrooms. There are 3 bedrooms that are
Is this a good idea?
Should it be directly under a vent?
Read The Fine Manuals (RTFM) that came with the detectors. They go
into detail on where to and where not to place them. Head level
(while sleeping) in bedrooms are good ideas as I recall from reading
You got a great deal on those detectors. Target sells them for around
I put mine in the basement near the floor. Only my water heater or furnace
could make CO, and I would rather find out about it when there was CO in the
basement than when it hit the bedrooms.
No alarms in 5 years.
For what it's worth, the basement and "near the floor" and "in the
actual furnace room" are all among the "bad idea" places listed in the
Part of the reason is that CO is slightly lighter than air and tends
to rise. The other part is that if yu have a cracked heat exchanger
and conditions that are putting CO into your ductwork, a detector on
the floor of your furnace room will quietly assume all is well because
it'll never know.
You are correct about not being near the floor. Although it is about the
same density as air, it is likely to be warm so it will tend to go up. I
will move my detectors up immediately! Thanks.
But I still think the basement is the right place. A problem with the water
heater is much more likely than a cracked heat exchanger. I have two, maybe
I will split them up. (of course, if the OP doesn't have a gas water heater
you would be right about that also. Live and learn...)
Nd not to mention gas clothes dryers.
But, how old is your furnace? And do you feel lucky? It's worth
noting the furnace runs a lot more often than a water heater and does
a whole lot more combustin'.... and your water heater doesn't have a
bloewr and duct work attached to help distribute it throughout the
So if you have two CO detectors one on the sleeping level is
definitely a good idea.
statistics on CO poisoning in homes compared to
other death causes. Way more chance of dying in a
car accident on the way to work, even if you wear
a seat belt. Diligence in gas appliance
maintenance stops the small possibility of CO
poisoning far better than a CO meter.
Basements aren't where most people live, and you aren't trying to wake
up your heater in the event of CO problems.
"Every home should have a CO alarm in the hallway near the bedrooms in
each separate sleeping area."
tom @ www.NoCostAds.com
Put it in your own bedroom, so you can hear it if it goes off. The
exception may be if the layout of your house suggests that potential CO
sources are significantly closer to the other bedrooms.
$33 isn't a lot of money if it saves your (or your kid's) life. If the
bedroom doors are closed at night, put one behind each closed door.
by the way...the inside of a heat exchanger is under positive pressure
from the blower...
if it should crack, air would blow out of it, it would not pull CO in
but bad stuff can happen and a CO detector is a very good idea...
My brother wanted me to buy one, and actually mentioned it twice,
which for him is a lot.
So I did. The instructions with this first A;lert, I think it was,
said it didn't matter too much how high the detector was, but that was
10 years ago. Maybe they've changed their minds.
I put in the outlet about 12 inches above the floor and 8 feet to the
left of my bed, which had an outlet not being used. 2 or 3 months
after I put it in, it went off at 3 in the morning, woke me up, and I
am alive to type today, although some of you may have notice that my
mental function is not as good as it should be.
I opened the window, ran down stairs to turn off the furnace. Then I
went up stairs where I got quickly colder. After 60 or 90 minutes I
closed the window, but I didn't turn the heat on. When the furnace
was checked the 8 or 12 inch flue only had about 2 inches diameter for
exhaust. The rest was soot.
At the time, some insturctions didn't mention oil furnaces as a
I called them with a couple questions and one thing they said not to
do was to test the detector by finding some CO and stuffing the
detector into it. I got the impression too high a concentration would
ruin that model.
Nighthawk makes suggestions on where to place them. I really like the
digital readout. I have one in the kitchen, one in the utility room
in the basement, and one in the upstairs hallway. Our FD recommends
having a smoke/CO detector on every level.
I have two, one in a room adjacent to the utility room (which contains
both furnace and H2O heater) and one in my bedroom. My furnace
inspector advised against putting one in the utility room, stating that
there might be small amounts of CO present that would be insignificant
in regard to safety (dissipate quickly enough to be no risk, utility
room is remote from living areas) but that might set off the alarm,
creating the possibility of a nuisance alarm that is likely to get
disconnected or ignored.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.