3. Use only Kerosene or #1 fuel oil. Never use gasoline, naphtha, paint thinner, alcohol or other fuels of any kind. 4. For indoor use only. Use only in well ventilated areas. Provide at least 2 sq. ft. of opening near the floor and 2 sq. ft. of opening near the ceiling. (Also see "Operating Precautions"). 5. Install the heater such that is is not directly exposed to water spray, rain and/or dripping water. 6. Maintain minimum clearance from normal combustible material (like paper) at least 8 ft