Here is the Fan I have in my Vanagon.
http://www.goodboatgear.com/detail/7400/%20Sirocco%20DC%20Fans
Great Fan, Not cheap seen for 80 to 180 bones pending where you shop.
Got as a gift from Santa one year. 3 speed LOW power consumption and
Quiet. Auto shut off times 2-8 hours.
Great to move air and equal out the hot and cold spots of a heater.
Think it is .4 or less amp draw. but can not confirm. also shuts off
if power is to low around 10 volts.
In winter I use my R-8 Thermal upstairs and the fan. Going to try
Candle heat this cold spell and see what happens.

Jonce

>Ol Al writes to say, "Lighting one candle with nominal airflow will keep
>the inside warmish until you can caffeine or mate' up"
>
>I used to use one of the smaller Dietz kerosene lanterns lit inside the
>Westy for (a) light and (b) quite perceptible heat in your colder
>evenings. They are quite nice and the added warmth is welcome. The soot
>blackening the overhead, not so much. I have since added LED lighting
>strips and have relegated the lantern to the outside. The new inside
>lights provide much nicer lighting but, since they are so darn
>efficient, kick off no heat. Lose one, win one.
>
>"Several of our esteemed adventurers keep the lid up but with a heat
>isolating membrane over the upstairs to keep a modicum of the expensive
>hot air (we see a lot of that around these days) in the cabin."
>
>I sleep on the downstairs bed with my head toward the front of the van.
>On your more frigid nights -- like in the teens -- I definitely feel a
>downdraft from the upper deck onto my head. I wonder about having some
>kind of fabric snap-in seal that would close off of the upper deck and
>prevent that downdraft.
>
>And in the morning, arising when it is in the low-30s (F) or lower in
>the van, I fire up the Mr. Heater Buddy (for about 30 minutes, that
>thing chews through 16.4oz bottles of propane at a fearsome rate, and a
>Propex heater would empty the van's stock tank quickly, too) before
>bringing in the preheated kerosene heater and think to myself, I think:
>sure a lot of hot air up in the top of this thing, sure wish I had a
>gentle ceiling fan to bring that hot air down to me where I am sitting,
>wrapped in woolens and down.
>
>--
>Jack "Rocket j Squirrel" Elliott
>1984 Westfalia, auto trans,
>Bend, Ore.
>
>On 11/04/2013 01:47 PM, Al Knoll wrote:
>>Following the thread along.  Seems there are several popular heater
>>types, ranging from the unglazed ceramic inverted on the westy stove,
>>to full blown furnaces (propex is a furnace).  Coleman (RIP) had
>>propane catalytics for years and mine still work pretty well.   Then
>>other radiant heaters like buddys, black cats, and so on rounding out
>>the bunch, with the exception of Rocket's kero blaster they all run on
>>either petrol or LPG.  Now since amount of energy going from fuel to
>>water and CO2 is gained by breaking CH bonds is proportional to the
>>number of bonds broken in the process, the most efficient is the Kero
>>using long chain hydrocarbons as the energy source.  The least
>>efficient is the Propane.  So for more BTU per buck stick with the
>>most efficient.
>>
>>Lighting one candle with nominal airflow will keep the inside warmish
>>until you can caffeine or mate' up.  Several of our esteemed
>>adventurers keep the lid up but with a heat isolating membrane over
>>the upstairs to keep a modicum of the expensive hot air (we see a lot
>>of that around these days) in the cabin.  Bob has one I think.  A
>>sleepytime hat will do wonders for those of little thatch.  And I use
>>a makeshift shawl around my shoulders made of dead synchilla skins,
>>adjusted to cover those nasty drafts.
>>
>>Oh ya, I do have a wondrous old propex which whines away under the
>>seat on occasion.
>>
>>Some years a go a fellow in colorado made and marketed a certified
>>radiant heater with an exhaust system to vac the nasties outside.
>>Disremember the fellow and the name of the heater.
>>
>>The organic squirrel coats can be a problem as the squirrels tend to
>>come out of hibernation and scurry around inside the coat.
>>
>>Pensionerd.,