I moved in my first house less than 3 years ago, and i admit i know nothing about house. This winter i began to notice there are too much humidity in my house. Water condensation all over windown, ice frozen at the bottom of the window, some black mold on the ceiling. The strange thing is that it was never like this before. I think hard on what's changed, then i think of these two things.
I just replaced my old furnace with a high efficiency furnace two months ago, and I know they built some new ventilation pipe through the side wall, or somthing like that. Can it cause some problems?
Second, there was some leaking in my kitch area. On and off for a while (we had warm Jan, so that is why i still saw leaking in winter), so there might be some water leftover?
The key thing is that it never happened like this before. I have to think one of these two things has something to do with it. Can anyone please give me some suggestion? Should I call the furnace company to check out?