If anyone is interested, here is a photo of the vented
platinum catalytic heater installation in my vanagon.

http://members.tripod.com/~wetwesties/maryhill/MARYHI12.jpg

As you can see on the picture, there is no cabinet around the
heater. It is just mounted on a board against the back of the
battery box behind the passenger seat.
On the right side you can see the exhaust hose where it exits
the plat cat and then goes through the floor. I rerouted the
exhaust inside the plat cat heater so that it exits on the
right side. This simplied the installation.
There still is enough space next to it for the fire extinguisher.

Photo was taken by James at our Maryhill wetwestie club
campout. Thanks to Jim Arnott, fellow wetwestie club
member, for posting this picture of our vanagon on his website.

Harald
'90 westy