Jeff,
When I run the Dometic cooler on propane, I have always used it outside the Vanagon.� When I used it with my Coleman pop-up trailer, I would use it inside the pop-up tent camper (which always had lots of air circulation).
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The units do generate some heat, and there are exhaust fumes (which are minor).� In the Vanagon, my main issue was space.� Taking it out of the Vanagon just opens up all sorts of room.� It also makes a great extra seat outside.� I never had it connected directly to the Vanagon propane system, so there was always the issue with the external propane tank and the hose connection.� 
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If I was leaving the Vanagon unattended for a long period, I would have no issue with leaving the Dometic cooler inside the bus, and leaving either the roof vent open, or the sliding windows.� It does not really generate that much heat.
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I think I will look at what I would have to do to hook up a one pound disposable propane cylinder to the cooler to add to the flexibility.� 
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There has been some banter on the Westy Dometic fridge.� I find that I rarely use the Westy Dometic fridge and use the Dometic cooler for most of my needs.� I like having the cooler outside.� While the Westy has the built in stove, I also prefer to use a propane stove outside.� I guess it is all a matter of personal choice........
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Cheers!
Stuart
86 Vanagon GL

From: jpalmer@mymts.net <jpalmer@mymts.net>
Subject: RE: Dometic Cooler

Dumb question time. �Is the issue with venting the exhaust gas or the heat or both?

Is it really that big a deal if all your windows are open? �I can see it would be an issue with propane heat, but isn't the exhaust off a fridge negligible in comparison? �Especially in summer with all the windows open and top up?

Trying to recall whether or not propane fridges (full size in cottages etc) are vented. �Don't believe they are?

Jeff