Reading the post all make sense, workshops can be dangerous places, but it is about managing the risk whatever your heat source is , electric fan heater has open elements etc, is your dust extraction earthed, do you smoke, if you have central heating where is the boiler etc ,the question is what is best for you both financially and risk. Evaluate the risk, then minimise the risk .
I am lucky logs cost me nothing, failures only cost me time (these are getting less) have I minimised the risk I hope, so all machines attached to central extraction which is in another room . 2 jet air filters on timers, most of all clean up each day/evening with vacuum attached to central system . All comes at a cost but I have environment which is pleasant to work in .
As woodworkers and turners all the equipment we use has dangers and we minimise the risk by understanding, do so with your heating whatever you chose.