In article , notbob wrote:
On 2011-01-10, Jeff Thies wrote:

Most people I know, myself included, keep one in the bathroom. Small
size, quick heat, reasonably safe. Still need to be careful. The safest
heater, is the largest, the radiator style IMHO.

All electric heaters are limited by wiring codes for 110V house
current. Max is 1500 watts. Add a fan and the motor subtracts from
heating element maximum. Radiant heat BTUs are determined by direct
conversion of amps to BTUs. Can anyone show me that ceramics are more
efficient than a heated metal filament?

The ceramics are more efficient at heating air, which is directed by
the fan to what is to be heated. The filament types are more efficient at
heating whatever absorbs their infrared radiation, though they do some
heating of adjacent air that rises upward.
--
- Don Klipstein )