[beojan]

A heating element is basically just a resistor, right? Which means if you run one on half the design voltage it'll draw half the current it's meant to and produce ¼ the power.

[dgfitz]

Half the voltage = 2x the amperage draw, not half, if I’m not mistaken.

[beojan]

P = (v^2)/R. It's R that stays constant, not P.