Cool Weather and Vinegar Brewing

We've been hit with an extended patch of unseasonably cold weather and with my side board being against the north wall of my house it just isn't staying warm enough for my vinegars to brew, even with me stirring them nightly in an effort to keep the oxygen levels high.  Tonight I've moved all the jars into my big hall closet close to the water heater hoping that it will keep the ambient air temperature warm enough to get the vinegar bacteria growing.