With 4.5 gallons you are probably o.k. for tens of minutes of idling, Al.

I

was much more concerned about Chuck's tank because it sounded like a

quart or

something without doing the math.  The bigger the tank the longer it

takes to

heat it to a critical temp.  I posted a graph a while back...here's the
spreadsheet.

Al Gietzen wrote:

Jeff;

Thanks for good info.  I assume the calcs neglect heat loss from the surface
of the sump tank, so might be a little conservative.

Al

 
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