Warm air can hold more moisture than cold air. Humans and their activities give off moisture. In winter humans maintain warmer than ambient temperatures. Therefore at some point the warm wet air is going to cool and reach its dew point.
Ideally you don't want this happening in the house, whether it does depends on the inside temp and the outside temp and humidity inside and out.
So there's a few knobs you can twiddle, temp being one.
Warm air can hold more moisture than cold air. Humans and their activities give off moisture. In winter humans maintain warmer than ambient temperatures. Therefore at some point the warm wet air is going to cool and reach its dew point.
Ideally you don't want this happening in the house, whether it does depends on the inside temp and the outside temp and humidity inside and out.
So there's a few knobs you can twiddle, temp being one.