I think if you can get enough air movement then the windshield won't fog. I know several people that just have fans that blow across the windshield. I was wondering if actually using the heater core to heat up the air was any good. The A/C in my daily driver is out and it's pretty much useless to run the defrost fan without being able to kick-on the A/C to dry out the air so I was thinking using the heater core wouldn't help too much.

David