In article ,
(Roy) wrote:

There seems to be differences of opinions on the properties of carbon
monoxide gas. One source says its heavier than air another says its
lighter, so.......is it heavier or lighter than air?

To be honest I rather trust the info from this forum than various
websites and media types.

Take a look at this while your at it... has some good links at the end.

http://en.wikipedia.org/wiki/Carbon_Monoxide

Be careful messing with this stuff...

Erik