A friend of mine has what amounts to a small oil filled radiator heated electricly. It has some kind of temp control- maybe a thermostat. There's no fan, no exposed element, it just gets gets quite warm. It's gonna spin the meter like anything else, but it's a much better "quality" heat and looks a lot safer than most. It's on wheels and he just rolls it out of a cabinet and plugs it in. Uses it in his hobby room in the evenings.