On 12 Nov 2005 19:18:03 -0600, Dave wrote:

On Sun, 13 Nov 2005 00:57:33 GMT, Brian Whatcott
said:

? Have you tried a paper bag over the head
for CO2 enrichment?

Doesn't answer the question. The paper bag over the head will increase the
CO2 as a percentage of the mixture and reduce the percentage of O2, rather
than leaving both constant..


The question I thought I was addressing is the safety of room
exhausted heaters. This was to note that we don't just flake out
and die, but tend to get a respiratory alert when the CO2 proportion
gets high. Presumably why the things are allowed under most codes.

Brian Whatcott Altus OK