The airco air is dehumidified by the temp. drop. That's why many high end compressed air systems use a refrigerant dehumidifier as well as a dessicant (medical/dental systems come to mind). This dehumidified air defrosts by "drying" the glass because of it's lower relative humidity. Hot air works by raising the "dew point" of the glass above the temp. that moisture will condense, relative to it's % humidity. It makes sense if you say it really fast.
The Golden Rule
1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)
Last edited by jbaj007; 09-07-2001 at 02:23 AM.