Mark,
I've never seen/noticed this change.  Can you reference a pic of this system?
Thx,
Karl Wolz
Sent from my electronic umbilicus

On Jun 20, 2013, at 8:03 AM, mark drillock <mdrillock@COX.NET> wrote:

> If you remove the passenger van center duct work you will find that much
> more air movement reaches the front seat area than before. The ceiling
> duct-work slows down the airflow and reduces it in my opinion. Whether
> the overall result is satisfactory is a separate question that will
> depend on individual circumstances and tastes. Try it and see, if you
> prefer it. More air, YES.
> 
> The Westy rear A/C is a different animal and there are 2 version. Those
> with the tan interior are almost all a weaker single fan motor setup
> that doesn't move as much air and that people are generally dissatisfied
> with. Starting about 87 it was upgraded to the more powerful dual fan
> motor setup that passenger vans above got starting with 86. This
> coincided with the  addition to the rear ceiling in the Westy of a wide
> flat duct that carries cool air forward to the edge of the poptop
> opening closer to the front seats. All of the 87+ grey interior campers
> with A/C got this improved setup as well as a few late tan 86 models. It
> is not just the dual fan motors that make the difference, that later
> system is better all around IMHO.
> 
> Mark
> 
> 
> Harry Hoffman wrote:
>> Hi All,
>> So, I'm wondering if anyone with A/C, that has the duct that runs along the ceiling from the front to the rear has removed said duct and determined if air circulation is better or worse?
>> Cheers,
>> Harry
>>