the big unit uses 1/4 lb. an hour ... the little unit uses 1/8 lb. and hour...constant operation.  One of those little camping 1 lb. bottles lasts 4 hrs.
in the big one  and 8 hrs. in the little one.  The westy tank holds 3 gallons...i think this translates to something like 13 lbs.  So with the big one
you could run it constantly for 52 hours (and drive yourself from the van!) on the westy tank and with the smaller one for 104 hours.  Since these have a
thermostat, they likely will not be on constantly.
steve

Nathaniel Merrill wrote:

> So, how long will it take a plat cat to drain a westy tank?  Can you keep it warm for several (long dark winter) nights in a row and still cook food?
> Inquiring minds want to know.
> Nat Sunny Seattle
> 1991 syncro westy (with a big gas aux. heater which is a blast furnace but electric hungry)