[laryb]

Tom, I'm told it does, but since I haven't been there full time yet it's just my opinion. The de-humidstat tells the air to go on when the humidity reaches a set point, not by temp, so it goes on a lot less. Since it's humidity that causes mold and the smell that goes with it, you shouldn't worry about how hot it gets, but how humid it gets. When we came in for a couple of days last weekend the temp inside was 89F, and every thing smelled fine and no visible mold or mildew. Now if you plan on never being away for extended periods, then you probably don't need one. On the other hand, it's only $75 installed, so it might be worth it in the long run.