But that may be a mistake. According to Appliance Magazine, the average American household of four does six to eight loads of laundry a week. Actually, they all work about the same. It really doesn't matter whether you use an electric or gas dryer. The clothes are kept in motion while hot air is blown through the clothes.
Air is pulled in from outside the dryer and exhausted to a vent outside the dryer.
A microwave dryer that would have a completely different method is in the development stage but isn't ready yet. First, the source of the heat. The next most significant issue is whether the hot air is allowed to circulate through the clothes. Plenty of hot air doesn't do any good if it can't warm the clothes. The key here is run full loads, but don't over-do it.