Have a spare refrigerator? Or at least surmountable opposition to you using your main refrigerator solely for brewing?
This device from Johnson Controls will turn your refrigerator into the perfect temperature controlled fermenting chamber.
You can now do Lagers any time of year, or even ferment that ale out in the garage in the heat of the summer!!
Installs easily on the side of your appliance, with the adhesive chain hook (no drilling required).
Simply plug the thermostat in and plug your fridge into the thermostat. The analog dial allows you to choose your temperature
from 30° to 80°F. There is a 3.5° differential to keep the cycling down, but your beer temp will stay right where you want it.