This catalytic is vented to the outside:

http://www.ventedcatheater.com/2.html

It is extremely energy efficient.  I'm thinking about getting one in my
Westy.

Scott

Loren Busch wrote:
>  RE: Heat
> For heat where you have shore power have you tried one of the small cube
> heaters?  I've carried one around for about 15 years and they are great when
> you have power to plug into.  Or, short of the Propex (I have a Propex in my
> rig) one of the Mr Heater products?  I have several friends that have the
> Mr. Heater and love it.
>
>
>