So far, it hasn't gotten below 70F inside my house yet this year, but when I do have to turn on the heater, all of the picture frames on the wall will condensate for the first few days. I love how warm it is here, because I just don't care for the arthritic cold of winter, but it has it's drawbacks. This is why all construction and materials used down here are different from most other building codes in the US. I guarantee that all older homes in this state all have some sort of fungus that is dangerous in them.