Just got, rather made, an oxygen aerating wand to use with an oxygen welding tank. Heat garage with a portable open flame kerosene heater. What precautions should I take to prevent the wort from bursting into flame? Plan to aerate at most 90 seconds. Kerosene heater is about 10 feet from the brewing bench. Garage is 5K CF (21x28x9). Will have a through-the-wall ventilation fan installed before brewing next time. It draws about 800 CFM. Am thinking need to do nothing. Any excess oxygen bubbling out of the wort, which I keep to a minimum, will be vented outdoors in short order. Just the same, wanted to know what your experience has been with open flame heating and aerating with oxygen.