On Jan 31, 2008, at 4:17 PM, Keith Ovregaard wrote:

> Well done, Mr Squirrel! Now we just need to apply that figure to  
> the amp/hour rating of the battery (hopefully not the starting  
> battery!) and that should give you approx. run time.
>
> BTW, my Propex HS1800 has kept me comfortable down to 16�F with the  
> poptop down. I do not run the heater at night, so fuel and battery  
> consumption are not really much of an issue for me. It does take  
> quite a while to get the cabin warmed up, but it does the trick,  
> especially while sitting on the back seat with a blanket over my  
> legs which forces the heat where it's needed. If I had to do it all  
> over again and had the $$, I'd go for more BTU's like the HS2800  
> delivers. However, the Propex heaters are  no competition when  
> compared to the factory installed gasoline-burning furnace that was  
> in my 84 westy.

What heater was that-an Eberspacher?

Mr. BZ

> I don't know what the BTU output was on that thing, but it got the  
> van warmed up quickly! Also used a LOT of amps and gas and could  
> only run for about 15 minutes unless the engine was running.
>
> Keith O.
>
>
> On Jan 31, 2008, at 12:59 PM, Michael Elliott wrote:
>
>> Well, 1.4 amps for one hour is 1.4 amp-hours (Ah) so if you run  
>> the heater for 30 hours you'll use 42Ah.
>>
>> -- 
>> Mike "Rocket J Squirrel" Elliott
>> 71 Type 2: the Wonderbus
>> 84 Westfalia: Mellow Yellow ("The Electrical Banana")
>> 74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano
>> KG6RCR
>>
>>
>>
>> On 1/31/2008 9:40 AM Keith Ovregaard wrote:
>>
>>> According to the Propex website specs, the HS2000 uses 13kg  
>>> propane in
>>> 91.5 hours (1/3 lb. per hour) and 1.4 amps continuous. I am not sure
>>> how many pounds the westy tank holds, but a typical BBQ tank is  
>>> 20lbs
>>> and 5 gallons. The westy is 3 gal. So, lets say there is 10lbs. That
>>> would give you 30 hours of continuous heat.
>>> Someone else want to do the math on the battery drain?
>>> Keith O.
>>> On Jan 31, 2008, at 5:54 AM, Automatic digest processor wrote:
>>>> second battery was almost dead!!! So yes, it take some juice... and
>>>> i would
>>>> not count on this thing for a week in the cold wild unless the tank
>>>> is full
>>>> and you have  2 spare batteries. The fan motor must drain about 3-4
>>>> amp an
>>>> hour. The propane will outlast the baterry, that is for sure.