Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Has there been any experimentation with redirecting window/sunroof air to the rear?

freebeard · 03-14-2015, 07:14 PM

I agree with aerohead. Ducts need to be short with a large cross-section. And the volume of air moving through the interior is [orders of magnitude] less than the air moving over the outside. The edge case would be a convertible with the top down.

Here's one that does/should work:

03-14-2015, 07:14 PM	#8 (permalink)
freebeard Master EcoModder Join Date: Aug 2012 Location: northwest of normal Posts: 28,940 Thanks: 8,217 Thanked 8,987 Times in 7,424 Posts	I agree with aerohead. Ducts need to be short with a large cross-section. And the volume of air moving through the interior is [orders of magnitude] less than the air moving over the outside. The edge case would be a convertible with the top down. Here's one that does/should work: