Ideas for maintaining a good brew temperature?!

Ideas for maintaining a good brew temperature?

i've been home brewing for a while, but i've yet to find a good way to maintain a good brew temperature during the summer.

i've tried freezing 2 liter bottles of water and putting them in the closet, i've tried putting the carboy in a cooler of water (this one ruined my brewometer) and also tried putting a shirt soaked in cold water around the carboy.

any other ideas? i was thinking of just grabbing a fan, but thats kind of a waste of electricity..

Put the carboy in a tub of water (below the level of your brewometer) and wrap a wet towel around the rest of the carboy, making sure a good part of the towel is submerged in the water. Place a small fan facing the wet towel and the carboy will cool due to the evaporation of water off the towel.

You can also take those 2l bottles of frozen water and float them in the tub to water alongside your carboy.

I made a lagering closet big enough for 2 carboys. Simple 2x2 strips of wood to make a cabinet. Between the stays, I cut 1.75 inch insulation to fit and covered it inside and out with very thin plywood veneer just for aesthetics. On the back of the cabinet, near the top, I made 2 small cutouts for piezo coolers and a temperature probe. The whole contraption draws less electricity than a lightbulb and can get the cabinet down to lagering temps in a few days.