I am not new to growing. Ive been around for a while but recently I got feed up with filling my 20lb co2 tanks so I switched to a propane burner and used it for about 8 months. My rooms were suddenly I was plagued with problems and couldnt figure out what the problem was. Then it occurred to me it was something that I changed and sure enough it was the burner. After some research I learned there are 2 grades of propane sold the L5 and L10. The 5 is for machinery and the 10 is for say your gas grill. The 10 is no good for an enclosed room it doesnt burn clean and lets off carbon monoxide as a by product and suffocates the plants and isnt good for us to breath either. Just figured I could save someone a big headache.
buddy of mine thought kerosene heaters would be good too. Just the same problem really, bad exhaust kills plants and people..
Dodgy using any kind of burner. I had a parafin lamp for CO2 and it resulted in everything being covered in soot, doh!