Look for one that is listed with a nationally-recognized testing laboratory. These heaters have been tested to meet specific safety standards, and manufacturers are required to provide important use and care information to the consumer. On heaters that are not listed, consumers have less assurance that the safety features and operating instructions are adequate.
Most dedicated wood lovers insist that the best finish for a wood floor is a floor-formulated tung oil. Derived from the nut of the tung tree, tung oil penetrates the wood and bonds with the surface fibers. More giving than a synthetic finish, a tung-oiled floor will evolve with wear rather than cracking or chipping. Originally developed as as ship sealant, tung oil naturally provides excellent protection from spills, water, traffic, and dirt. Cleanup is simple, with a little clear vinegar in water or an oil soap mixed with water.