do ceramic heaters use more energy when cold?

i have a 250 watt screw in heater that is for a reptile terranium.

It is one 24/7 and was wondering does it draw more power

when its cold? does resistance of a wire change with temperature?

3 Answers

  • 1 decade ago
    Favorite Answer

    You get what you pay for with heaters, the better the quality usually means you will have a more efficient heating element, any heater is going to draw more power when its cold. Wire resistance is not effected by temp. change

  • 1 decade ago

    Yes, resistance on a wire changes with temperature, but not enough for you to notice.

    Your 250W heater will draw 250W more or less. Line voltage will affect power more than ambient temperature. The temperature effect is minimal.

    Most heaters are rated for xWatts at 120 of 125V. Your utility delivers power at 110 to 120V, depending on generating capacity and load. At 110V, your heater does not put out its full 250W.

  • 1 decade ago

    Check the amperage for that heater if it is over 20Amps you might want to consider something else. Your amperage will run up your electrical bill

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