Hi Gang,

I don't have direct experice with my van needing a heater, but the my
sailboat will get one of these dickenson propane heaters next year.
 They are certainly nice for a small boat, but I'm sure a resourcful
individual could adapte one to the amibiance in their westy.

I've seen these propane heaters in my local marine supply.  The one
pictured here actually has a  flame window, like a fireplace and  the
top is used for heating a tea or coffee pot.  I see them occasionly used
as well.
http://www.dickinsonmarine.com/shop/categories-heaters.asp

Sincerely,

Mark Keller
 91 Carat
Northwest 21 Sailboat