Nest (http://www.nest.com/ http://www.nest.com/) is already working on a thermostat that solves this problem. I can't imagine it would be hard to adapt it for h

Nest (http://www.nest.com/ http://www.nest.com/) is already working on a thermostat that solves this problem. I can't imagine it would be hard to adapt it for hot tubs as well. On an unrelated note, I really want a hot tub.