Guys, the one thing here that I have not seen mentioned is a carbon monoxide detector. I used to use a Kerosun heater in the garage. After 3 or 4 hours I would come into the house, kinda dizzy and nausiated. I thougt it was the brand of Whisky I drank. I changed brands no help. (several times) Then one day my wife came out to the garage, took a couple of breaths and nearly passed out. After checking that heater put out gobs of BTU's but also put huge amounts of particulate matter as well as enough carbon monoixide to kill an ox. My wife is in the health care industry. From what says I would wish Alzhimers disese on somebody rather than consist repeted carbon monoxide exposure.
