On Fri, 03 Dec 2004 23:04:21 -0500, Courtney Thomas
wrote:

Have come into an old single burner and am considering it as a backup
source.

Opinions, caveats, advice ?

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I am very wary of any combustion heater that does not vent to the
outside. At the least you need a CO monitor and alarm but there are
other risks such as oxygen deprivation and poisoning from combustion
byproducts.