Electric heaters don`t require any ventilation, but there has been several references to propane and kerosene heaters in the thread and they do require ventilation.
I use a 90,000 BTU kerosene torpedo style heater and it heats the garage quickly and easily,but..... You need to be careful about burning up the oxygen in a confined space when using any type of combustible heater. When using mine, I have the passageway door open about 6" to a foot and leave the garage to heat for about 15 to 30 minutes. Then I turn off the heater and close the door. If the area gets cold again, I repeat the process.
The fumes are not bad, but the thing is noisy.
Charles
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