Fermenting when the temperature fluctuates

Like many homebrewers, I would rather ferment outside the house, most in a garage, some in a shed (brewhouse). We also do not want to heat them. In the summer, it is simple to set up a cooling system, in the winter a way to warm. But what about spring and fall? Nightime temps can drop into the 30's, daytime in the 70's. Too cold or too hot to ferment a beer at the preferred temperature. We (at Brewhemoth central) have come up with the perfect solution, a dual set of tubes that can go into the Brewhemoth, one that can chill the wort when needed, the other can be heated when needed. Will be tested next week with a batch of American Pale ale. Here is a picture of it half done.



And here is it finished.....

And the top

Carefully marked so the proper hoses go on the right line!