[myself248]

For things like garage door openers that only run for a moment and only once in a while, the payoff would likely never come. But for things like dryers where it's a simple continuous motion for hours on end, I could see it easily justifying an air motor conversion.

Bonus: Compressed air is inherently dry. It'll come out of the motor cooler than ambient, but pass it through a heat exchanger and you'll get almost-room-temp super-dry air. (And maybe use the exchanger to condense some of the moisture out of the dryer's exhaust; you're halfway to a ventless condensing dryer already!)

I wonder if refrigeration appliances would be designed differently if they assumed compressed air as the power source.