Originally Posted by Bobby_M
I always wanted to build a fermentation chamber in my basement and have a dryer vent hose connecting it to the outside. My logic was that the overall temp of the basement is 66 constant in the winter. The outside is usually below 35. I figure, the controller could be set to 33 to run a small 3" fan to pull air into the chamber from outside. A small "flapped" exhaust port in the chamber would let the warmer air out. This would essentially work for both lagering at 33 and fermenting at 55 as long as the outside temp was a little colder than your desired set temp. This could even be your freezer whereby the exercise I'm describing would keep your fridge from running during the winter. Worth it?
Jeezus-just watch the classifieds for an old chest freezer. Or ask around for one. Throw your controller on that and you're done! Why go through all the headaches? By the time you've gone and bought two controllers, two heating ducts, etc, you'd have prolly spent more money and definitely more time on something that will only work in wintertime, which is when you need it least. I'm on my second free freezer. The first was a hand-me down from my sister and the second was a give-away from the paper. Granted, it's ancient, but I only use it when I make a lager in the summeritme. In the winter my beer room is plenty cold.