Dave wrote:

On Sat, 12 Nov 2005 09:10:46 -0500, Larry said:

Is now a good time to point out that this detector does NOT detect the
presence of POISONOUS Carbon DIOXIDE this heater pours out as it consumes
all the OXYGEN required for life?

You're mixing up two concepts here. CO2 is NOT poisonous. CO, on the other
hand is. However the absence of oxygen that may result from the creation of
CO2 can result in death if the O2 isn't replaced, just as the absence of
oxygen for any other reason can do the same.

Actually an excess of CO2 can be a problem, it's just a problem at a
higher concentration than CO is. The IDLH (immediately dangerous to
life and health) limit for CO2 is 40,000 ppm whereas CO has an IDLH
of 1200 ppm

CO2 is regarded as a simple asphixiant, just like an excess of
nitrogen or any other inert gas.

Matter of fact, O2 at high pressure and concentration is poisonous, leading
to convulsions and ultimately death..

Most of the time what happens with O2 in excess of 23.5% is that there
is so much danger of fire (asphalt becomes combustible in pure
oxygen).

grandma Rosalie