JohnBoy,
Colleagues is in the distilling and like solar I would like to test myself to see if I can build one that can actually work.
Proof is in the drinking
Danie, You have to confirm this is the case. If you have warm air from the engine bay area leaking through to the air collector area ( the ducting area just before your windscreen) it would mean you will be getting allot of warm air blowing into the car which could feel to you like the heating comin...