Date: Sat, 09 Dec 1995 22:45:37 EST
Sender: Vanagon Mailing List <vanagon@vanagon.com>
From: Crazed Idiot <sbart7kb@s850.mwc.edu>
Subject: Breadloaf bus ducting
Hey all,
I was thinking about the recommendations for those fans you can
buy at boating stores to improve defrosting efficiency. I'm
having trouble imagining things, so if you could help me out I'd
appreciate it.
On the top of the bus dash, there's a vent smack in the center
and there are two more defroster vents, one on each side. Are
all these vents connected to the heat line or is it just the one
in the middle or is it just the ones on the side? I'm thinking
it's just the one in the middle and I'm thinking the ones on
the sides are for fresh air and not heated air. Could someone
clear this one up for me? By the way, I'm speaking of late
model buses, like '77-'79.
Also, how big are these boating fans? Could you conceivably
install one in line with that big round heat hose under the bus
to speed heat flow while perhaps purchasing two more smaller
fans, one to be installed inline with the fresh air ducting andn
one to be installed with the defroster ducting or are fresh air
and defroster ducting one in the same? Is three fans overkill
or what?
Here's what i'm thinking -- one larger fan in line with the big
heat tube under the bus for the express purpose of speeding
heater flow. This fan would be placed toward the front of the
tube, so it would probably also help defroster flow quite a bit.
I was also thinking of a smaller fan to help with fresh air
flow, as fresh air flow is nonexistent when the bus isn't moving
and it's a bitch to keep the windows clear in a VW in a summer
rainstorm if you're in traffic (been there, had a bug with same
fresh air system). If the defroster ducting is separate from
fresh air ducting, perhaps a third fan to help with that if the
fan in line with the big tube isn't enough (which it probably
would be).
So, I would like to know what is the deal with the
defroster/fresh air ducting. Is it the same or is it two
separate systems or are they connected and if so, how? I'm
betting that they're connected somehow. I can envision a nice
little setup with three little toggle switches mounted on a
single panel under the dash to do the job. I don't want to
overload the electrical system, but all of these hypothetical
fans would not be running at the same time except in the even of
some freak weather occurence :) . Am I thinking about this too
hard or does some of this make sense? Thanks in advance for any
and all help.
Sean
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