1.   In climates with excessive outdoor humidity, an energy-recovery ventilator is more suitable.

2.   Patches of mold or mildew stains are signs of excessive humidity and inadequate air circulation.

3.   Q. Ever since I had loose fill insulation blown into the attic several years ago I have had trouble with excessive humidity inside the house during the summer.

4.   This will circulate the air and help keep excessive humidity from building up below the ceiling.