OK. You're talking about a defogger rather than a defroster. Two different situations.

The problem is that you wont be blowing conditioned/ dehumidified air on your window to defog it like a modern car. You're just going to be blowing warm/hot air with the same humidity content on the fogged up window.

I think your best bet is to keep the inside of the windshield wiped down with RainX. Try doing it on your vanity mirror in the bathroom and look what happens when you steam it up during a shower.

The water on the glass beads up and rolls down allowing you to see your reflection instead of staying fogged up.


1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)