Those fresh air vents have flaps. They open when there is pressure. They don't do much for circulating air.

I went to the trouble of replacing the flaps with screens. 

That made no difference.

It would have been nice to have a fan at the front that would move air through the van and flush out the hot air when parked.

But that's a fantasy.

> On Mar 19, 2015, at 10:28 AM, Kevin Duvernay <kduvey@GMAIL.COM> wrote:
> 
> I think one is for 80-87 vans and the other is for 88-91 vans. 88-91 had a
> vent in the rear of the rear windows as part of a fresh air circulation
> revamp attempt in 88.
> 
>> On Thu, Mar 19, 2015 at 12:25 PM, Raimund Feussner <ray@v6bus.de> wrote:
>> 
>> These are either a GoWesty design, or (which I doubt) a prototype SA
>> window.
>> 
>> I know a german SA prototype with 5-cyl, but the original bodystyle.
>> I can´t remember the windows. But if it had the sliding window type of
>> later SA Vanagons, then they must have had the "front middle height" handle
>> with the old outer dimensions.
>> 
>> The second link looks more like a "brown doube plastic glass" camping
>> window?!
>> 
>> Raimund
>> 
>> 
>> 
>> Am 19.03.2015 um 18:19 schrieb Kevin Duvernay:
>> 
>> Sorry, second link was ment to be this:
>>> http://www.gowesty.com/ec_view_details.php?id=23422&
>>> category_id=23453&category_parent_id=
>>> 
>>> On Thu, Mar 19, 2015 at 12:18 PM, Kevin Duvernay <kduvey@gmail.com>
>>> wrote:
>>> 
>>> http://www.gowesty.com/ec_view_details.php?id=23453&
>>>> category_id=&category_parent_id=
>>>> http://www.gowesty.com/ec_search_results.php?start=30&
>>>> search_phrase=sliding
>>>> 
>>>> On Thu, Mar 19, 2015 at 12:16 PM, Raimund Feussner <ray@v6bus.de> wrote:
>>>> 
>>>> That seems not to be true. VW did exactly that.
>>>>> 
>>>>> I´ve seen photos of older and newer Vanagons (ca after 85 was the change
>>>>> I believe).
>>>>> 
>>>>> I have two rearmost sliding windows collected, one early, one later.
>>>>> The earlier one had the sliding part in the front, as I like it. I guess
>>>>> this fits the early Westies with a D-pillar closet covering the rear of
>>>>> the window.
>>>>> The later one (I think when in Europe the Multivan was introduced, with
>>>>> plastic interior and fold-out table that you know as Carat) is exactly
>>>>> the opposite:
>>>>> Sliding part in the rear, with the seam between the panes perfect for
>>>>> rain water ingress. Still seemed to work as they sold it (rarely) until
>>>>> the end of the Vanagon.
>>>>> 
>>>>> ETKA tells me the same differences. Not visible on the pictures, but the
>>>>> part numbers will give you the hint!
>>>>> 
>>>>> I still don´t trust the newer version and will install the earlier
>>>>> version in my ´92.
>>>>> 
>>>>> Raimund
>>>>> 
>>>>> 
>>>>> Am 19.03.2015 um 18:06 schrieb Stuart MacMillan:
>>>>> 
>>>>>  Fine idea as long as you never drive in the rain.  It will blow in
>>>>> 
>>>>>> between the panes, which is why VW installed them the way they do.
>>>>>> 
>>>>>> Stuart
>>>>>> 
>>>>>> -----Original Message-----
>>>>>> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On
>>>>>> Behalf
>>>>>> Of Vincent Dow
>>>>>> Sent: Thursday, March 19, 2015 9:06 AM
>>>>>> To: vanagon@GERRY.VANAGON.COM
>>>>>> Subject: Sliding window idea
>>>>>> 
>>>>>> For years I've been considering how to make the back windows on my van
>>>>>> open, so that my dog can get her head out and sniff the air.
>>>>>> 
>>>>>> I've seen a few interesting options.
>>>>>> 
>>>>>> I'm thinking about taking out the slidingdoor window, and it's
>>>>>> counterpart on the driver's side, and flipping them. That way the open
>>>>>> window would be accesible from the back bench. The dog could put her
>>>>>> paws
>>>>>> on fold out table, and get some air.
>>>>>> 
>>>>>> The passenger side silding window has the danger of a guillotine effect
>>>>>> when the door opens, but a mostion limiter would take care of that.
>>>>>> 
>>>>>> Any thoughts? Anyone seen this, or even considered it?
>>