Burning Ethanol Fireplace Fuel – Pros and Cons Learn Pros and Cons of burning Ethanol Fireplace Fuel in a Ethanol Fireplace. Ethanol is clean burning, no smell, no smoke, no ash, no toxic exhaust. Ethanol Fuel Safety increases using a flame arrestor to prevent flash or explosion when refueling. in Public bookmarkswith bio_ethanol_fireplace_fuelethanol_fireplaceethanol_fireplace_fuel Note: Learn Pros and Cons of burning Ethanol Fireplace Fuel in a Ethanol Fireplace. Ethanol is clean burning, no smell, no smoke, no ash, no toxic exhaust. Ethanol Fuel Safety increases using a flame arrestor to prevent flash or explosion when refueling.