On Tue, 13 Nov 2018 14:27:01 -0600, -MIKE-
wrote:

On 11/13/18 1:46 PM, wrote:
Are propane or kerosene heaters SAFE to use in enclosed spaces if the
heater is not vented to the outside air? I've always heard they were
not safe if not vented outside. And for the garage under
consideration here, cutting a vent hole in the wall does not seem
like a good idea. Unless its an unattached garage building with no
insulation so cutting a hole is real simple. I would not want to cut
holes in the walls of my attached garage. Thus the reason electric
heaters are popular.

Yes, "ventless" heaters and fireplaces (and logs for same) have been
available for a long time. They're perfectly safe. Of course, CO
detectors should be installed in any building where there is
combustion, vented or not.


Most are considered "clean burning."
Look at the manufacturers warning pages and you'll see a list of
"pollutants."
They do give off some, but are considered low enough levels to be safe
for indoor use.
A typical gas stove does the same.
They provide the typical warning for pregnant women, the elderly, small
children, etc.

The same warning is on bottled water and don't forget the Prop-65
warning.