Ok, know this is a lamp thread, but the subject was raised about unvented flame heating of a living space.
I own several kerosene heaters for emergency use, have used them a lot in the past, and have had training on
proper use, and repair of these heaters. They are perfectly safe when used *as directed*, and with adequate ventilation.
Did a little looking around for online information on the subject, here is a pretty good article on Kerosene heaters use...
http://www.iii.org/article/kerosene-heater-safetyA few excerpts from the article regarding Oxygen depletion and Carbon Monoxide production:
"Kerosene heaters consume oxygen as they burn. If they are operated in a small room or in an inadequately ventilated area, oxygen in the air could be reduced to a dangerous level. Reduced oxygen supply could lead to incomplete combustion of fuel and the production of carbon monoxide. Carbon monoxide is a colorless, odorless gas which in sufficient concentrations, or if breathed over a period of time, can kill without warning."
"The real danger is that misuse of kerosene heaters could replace room oxygen with carbon monoxide and lead to death by asphyxiation.
Therefore, it's important to have adequate ventilation to other rooms, and a source of fresh, outside air such as a window or door open at least one inch whenever you're using a kerosene heater."
This information appllies to *ANY* unvented heating device, be it kerosene, natural gas, propane, unvented gas fireplace, buddy heater, etc, etc...
Not trying to scare anyone out of using these appliances, just want everyone to understand how to properly use them. Read the directions that come with
the appliance. Have a working C.O. detector. Keep the appliance in good condition, and use common sense.
I've been in the HVAC buisness for 30+ years, and have been to many, many homes where I found C.O. present for a great variety of reasons.
Thats my 2 cents lol, and best wishes y'all