Is that really only 1500btu?  I have a couple unvented catalytic
heaters.  One is portable 7000 BTU, the other is meant to be mounted and
plumbed in and is 3000btu.  the 3000 BTU one didn't put out enough heat to
be worth much to me.  I do take the 7000btu one with me if I'm going to be
camping off grid in winter.  It does warm you up.  As was said, it heats
people a lot more than air with its radiant heat.  It has only one
speed.  On a recent trip i found that I wanted to turn it down once I got
warm, but I just had to turn it off and wait until I got cold.  I find that
opening the skylight an inch or so, and opening the vents in the front
doors gives a good air circulation to let the fumes/moisture out without
losing too much heat.

Edward

At 09:06 PM 1/3/2007, Michael Diehr wrote:
>Santa left me a Coleman sportcat heater, the basic 1500btu
>model. :-)  Anyone use these while vanagon camping and care to share
>tips?   How long does it take to heat up a cold van in the morning?
>What sort of temperature differential can they handle before you
>drown in humidity or die of CO poisoning?   Would it be possible to
>mount one of these near the stove or fridge, and tie it into the
>van's LP system?  Might make a really cheap alternative to a built-in
>heater?