Well ok then, I call BS on that. No wait. I'll replace the fan cooled magnetron in my microwave with a water cooled unit. Tap a line from the nearby frig(used for the ice machine) and while I cook dinner I get hot water for the dishes all while being 30% more efficient. No wait even more efficient overall because now I get hot water for free.
Whats next - an all in one refrigerator(with ice machine)/microwave/dishwasher combo unit?