"John Sevinsky" wrote in
oups.com:

But there's something I don't understand. Since all electric heaters
are 100% efficient, how can an 8' 2000 watt hydronic electric heater
not put out as much heat as an 8' 2000 watt standard electric heater?

You are confusing heat (energy) with temperature. Both types put out the
same amount of energy. The hydronic heaters radiate their heat from a
larger surface, but at a lower surface temperature. The standard electric
heater has a smaller radiating surface that runs at a higer temperature.