Air conditioning is the fastest way to get that condensation off the windows
unless it is below freezing.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Cunegonde
Sent: Wednesday, May 7, 2014 6:33 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: WBX Front Heater Core Mystery Sheet Metal

Baffled I was. Found
http://www.thesamba.com/vw/forum/viewtopic.php?t=277650&start=0&postdays=0&p
ostorder=asc&highlight="Block Off Plate in Front Heater" survey. Someone
suggested the plate is for backpressure to keep the ram air flaps closed
sufficiently for defrost when driving at speed.

I tested it the whole box out of the car using two shop vacs as the ram air
supply. I tried it baffle in and baffle out; the block off plate does indeed
make the ram air flaps close. No plate, less defrost air volume. Couldn't
test for defrost or heater duct air temp differences out of the car.

One guy on the samba had about a 10-20F rise at 40f outside air temp w/out
the baffle, but he wasn't going highway speeds. So I guess we get a smaller
amount of hotter air w/out the flap. I suspect here in the PNW where it's
wet condensation to be moved that's the biggest issue, more air volume would
be better than hotter air.

I reinstalled w/baffle plate. Just having a new Behr heat exchanger and new
fan should make a lot more than 10F difference from before!