I have put them in the closet (coolest room in the house) for about 2.5 months and it seems to work fine. I live in central AL. The first time I used a closet where the temps stayed around 60 to 65. I now use a closet that has two walls to the outside and that closet stays cooler. (from ~54 to ? depending on how warm it is outside. Now we are in the 70's for a week or so and that ain't helping!