I think they did their math wrong. If we assume an iron operates at 1000 W (probably about right), then 21 hours of ironing is 21000 Wh, or 21 kWh. Someone pr

I think they did their math wrong. If we assume an iron operates at 1000 W (probably about right), then 21 hours of ironing is 21000 Wh, or 21 kWh. Someone probably got a little confused and ended up off by a couple orders of magnitude.