On Thu, 15 Nov 2018 07:31:02 -0800, pyotr filipivich
wrote:

on Wed, 14 Nov 2018 20:54:43 -0500 typed in
rec.woodworking the following:
On Wed, 14 Nov 2018 07:58:28 -0800, pyotr filipivich
wrote:

" on Tue, 13 Nov
2018 11:46:51 -0800 (PST) typed in rec.woodworking the following:
Are propane or kerosene heaters SAFE to use in enclosed spaces if the heater is not vented to the outside air?

Depends on what you mean by "safe". The issue is the build up of
combustion products, particularly Carbon Dioxide. If you don't have
adequate fresh air,* you may get a lot of incomplete combustion,
leading to Carbon Monoxide production. While breathing CO2 is bad, CO
is really bad to breath. Insidious in a manner that CO2 isn't.

tschus
pyotr

*one of the drawbacks of modern 'airtight' energy efficient
construction is the reduction in air exchange. Sure you used to have
drafts, but you didn't have to worry about the heater not getting
enough fresh air.

True enough but only a fool would have a combustion furnace, stove, or
other device in their home without a functional CO detector.

When drafts like those, exhaust product production is not a major
concern.
Now, the next question is: how sensitive do you want your
detector? 100ppm? 50ppm? the least amount detectable?
I want the best detection possible at an affordable price. The alarm
limit is a different story -and even there, very low because if you
are getting ANY Co something is not working right - - -