Brian Lawson writes:

Seems to me to be some confusion between the term Kilowatts and heat.

Nope. Read the magnet specs someone else posted for the DC resistance of
the coil and the DC current. I*I*R ends up as heat in the magnet coil.

They just use that much energy, and not necessarily as heat.

Seems to me to be some confusion between the term energy and power.