> 1: A replaceable bottle mounted right in the door;
> 2: Hose going to bottle/tank under the seat.

My understanding is that propane bottles are not to be used indoors... they
have pressure relief valves... as the bottles warm the pressure builds
inside and the valve can open, leaking propane inside the van :(

>
> The door would have to be prevented from opening completely- to prevent
the
> heater from impacting the body as the door slides.

I don't think that would be too good...

> As you note, venting would be a cinch

Sure... for those few who would be willing to cut a hole in the outside of
their slider door...

On the other hand.... I believe the Plat Cat was 6 inches thick to
accomodate the venting system... perhaps if the venting went right out the
back it would be engineered to be only 4" thick?

Bill

Bill