Why do my windows get frosty? By: Ryan Woodland Rob Branham

No frost Frost is found on the rear window and not on the side windows.

Frost beginning to form. Frost is found on the rear window and not on the side windows.

Equations Windows approximated as a rectangular surface on an infinite flat plane A1 = window A2 = ground A3 = sky

Results

Conclusions and Recommendations Higher heat loss is found in the window with lower angle with respect to the ground. The windows that are more open to the sky reach a lower temperature faster than the windows that are not as open to they sky. Any method that blocks this radiation will keep more heat in the car longer. –parking in a garage rather than on the street –putting a cover over your car at night –parking under a tree