[martin_fierro]

buy a CO2 detector.

Get an OCD detector, too.

you just can't pay enough attention to that stuff.

[Conserev1]

{Kinda makes you wonder why the big deal with venting things like your water heater and gas fireplace. No? But that’s the way it is.}

Because of carbonmonoxide, that’s why!
I know two families that lost their lives because of an improperly vented water heater!
These appliances burn more quantities of nat gas or lp than a range.
A typical WH burns 45 cubic feet of gas an hour, a furnace will burn 100CF on the low end. In other words a 125,00 btu furnace burns 125CF where a range burner may be 5CF or less.
1000btu = 1 cubic ft.
Unless you are qualified do not tamper with venting systems.
It is also a goos idea to have your system checked once a year to make sure is is working properly!

[RichInOC]

That picture is a sure cure for attention deficit disorder. I could stare at those eyes all day.

[Smokin' Joe]

I worked with a guy some years ago with a milder form of OCD. The warehouse was clean and everything was in its place.

There is a place for most everyone under God's blue sky...