On Tue, 28 Oct 2003 09:54:26 -0600, someone wrote:

If it burns cleanly/completely then it will only produce carbon dioxide.
However, as a safety measure, you'd better have carbon monoxide detector
in/around your house (or bed room.) In fact anything emitting flames
inside your house has the "potential" to produce carbon monoxide that
kills.

The other significant (but non-lethal) issue is the water vapor. The
main products of "complete" combustion are CO2 and H2O. You can put a
lot of wet into a space with one of these. Maybe its a problem
(buildup in a tight house) or maybe its not (need for humidification
in a loose house).

-v.