We recently purchased new Pella windows (spring 98). Since then, we notice moisture on the Windows, when in the past with the older windows this was never an issue.
We live in a one story SLAB house, and do not have a humidifier attached to our furnace. the furnace itself is a down draft model with the furnace duct (clay pipe) in the foundation. The house was built in 1962.
There appears to be ample attic ventilation in the soffits, and octagonal vents on each gable. I did read through the current positing relating to moisture, but was wondering if anything further stick out.