Quote Originally Posted by Geckodelic View Post
What does this do? Don't I want the thermostat to be proportional? What happens to my temps if I switch to non?
You definatly want to run your thermostat on proportional mode, you can test the flexwatt by switching it to non-proportional mode to see if it still makes the humming noise, but the same thing will be accomplished by just plugging the flexwatt into the wall.