Hi David.

Actually I wrote the text below.   :)

The fan I'm thinking of installing would be something like this:

http://www.xoxide.com/yate-220-blue.html  (or bigger),

on one of the slider windows.

But I see your point. Instinct (notice the distinct lack of scientific
knowledge here <grin>), told me that the vent up top would be best. I was
just trying to see what may work, and what may help others in terms of a
user friendly install. For my needs, if the fan proves not so good, I can
always use it to blow air around while sleeping.  (I bet it's much quieter
than the Canadian Tire fan I bought recently)

And, I had wondered about aftermarket solutions. More Googling!

Neil.

On Tue, Aug 3, 2010 at 12:49 PM, David Beierl <dbeierl@attglobal.net> wrote:

> At 11:02 AM 8/3/2010 Tuesday, Jake de Villiers wrote:
>
>> > Was thinking of alternatives to installing a vent on pop top. They are
>> > pricey, and I've read they can leak. But that's likely due to install
>> > error. Still. If there was a less expensive way for us w/o the factory
>> > installed vent....
>>
>
> The skylight/vent is darn useful, worth real money in my
> opinion.  Among other things it gives substantial convective
> ventilation when you park the thing with a couple windows
> cracked.  Since the hole isn't already there you can get a standard
> size, and have a built in screen, built in fan with or without
> thermostat, built in rain detection, probably a built in 105 mm
> howitzer.  Because of the diameter, the fan will either move a lot
> more air or be a lot quieter or both, compared to a little muffin
> fan.  The smaller a fan is the worse it works, even without the motor
> taking up a big chunk of real estate in the middle.
>
> The stock location is in a neutral pressure zone  when you're under
> way -- air will flow either in or out depending on what the other
> windows and  vents are doing.
>
> The village wisdom of the list says don't leave (the stock one) open
> under way to save battering the mechanism; however my experience is
> that if you bring it wide open with the lifters tight against the
> stops, it will travel forever that way without bothering a thing.  I
> did it that way for 160,000 miles with no discernable effect on the
> mechanism.
>
> Yours,
> David
>

--
Neil Nicholson '81 VanaJetta 2.0 "Jaco"

http://tubaneil.googlepages.com/

http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines