Space oil furnaces have been on the market for a very long time, & they are used properly all around the country every year… They are convenient & incostly for taking the chill out of the air in your home, and also, people use them in their offices at work when the Heating & Air Conditioning unit doesn’t exactly do the task or if their colleagues adore the temperature a bit lower. There isn’t a single thing wrong with using a space heater, & they have become much more safe over some time, however it still pays to use caution when using portable space heaters. You need to be sure to learn and then read all of the directions that come in the box with your space heater. Never use it to dry mittens or heat up your blanket. Don’t leave your space furnace running while you are not there, if you are going out, turn it off. The need to use the furnace while you are asleep may be real, however don’t do it. Please never use your space furnace if you see that it has any disfigure. If it has a crack in it, is dented, or the wire or plug looks a bit flimsy or frayed, just throw it away & get a brand new heater. The risk is not worth it! Do not plug anything else into the outlet where you have clogged in your heater, and overloading your wall outlets is not very safe and can even cause a fire; Keep flammable things away from your heater, as well. Flowy curtains, the newspaper, a pile of magazines, a throw rug – these are all highly flammable & should not be somewhere near your heater. Finally, use your smoke alarms just in case!