I just upgraded my brewery to include a refrigerator for fermenting. I live in a hot part of Australia and get bad results during the summer because the yeast gets too hot. I've tried all sorts of simple methods of cooling the fermenter, but when its over 30 celcius inside the house for most of the day it's not easy. I use DCL Saf Ale yeast and it needs temps between 16 and 23 celcius.
I went and bought a room air conditioner thermostat and wired it in place of the original thermostat, to give perfect fermenting and ageing conditions (I've set it on 18 celcius/64F).
When I want to drink it, I just shift a few bottles to the kitchen fridge.
I'm hoping for a dramatic quality improvement. Has anyone else done something similar? and what were the results?