I have a gas dryer and often wondered if a line would be a decent savings. I use one from time to time. Have you ever figured it out?
Anything that draws heat, takes a lot of electricity - but refrigerators and freezers and stoves are the biggest hogs.
I outlined my way to save a lot with the stove...and as for refrigerators, mine is small compared to most - I see no reason for paying, for example, for a huge refrigerator with an ice maker and water dispenser.
The things I do to save power isn't to 'save the world' but to save money.
But another reason for hanging wash out - nothing smells better - and to climb into fresh, sun-kissed, wind whipped sheets is almost sensual...