My thanks to all who responded to my questions about my
P4 furnace's performance.  I recently returned from a 10-day
trip which included 4 nights of camping in the Westy.
We used the furnace 3 of those nights.  Two were only
moderately cool, and the furnace did fine at keeping the
temperature up just a bit.  One was cold, and the furnace
seemed to be doing pretty well initially, but unfortunately
my battery was drained long before morning - I think I've
got battery problems - so I don't really know how well it
would have done.  I'll have to try again when I get the battery
problems worked out.

                               -Steven Sittser