In a message dated 2/25/98 9:58:56 PM, jag@CS.ROCHESTER.EDU wrote:

<<Note however that improvement is limited by the ratio of glass
area to insulated area in the Vanagon, unless you start covering
also the glass. Single pane glass is approx R=1. Heat "resistance"
in parallel circuits calculates just like in electrical circuits.

/Martin>>

You can loose a lot of heat through the glass.  There are quilted insulated
window covers available, or you could make your own.  Many WV campers in
Germany have insulated windows.  These are made of two layers of plastic and
have a brown tint to them.

Steve
'74 Campmobile
New Side Tents at http://members.aol.com/tentinfo/index.html